AX Series
Dynamic Power Saving Functionality
Configuration Guide

Edition 2

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Preface
The trend towards green computing has created a need for power saving solutions in routers, switches, andother network equipment. The purpose of this AX Series Dynamic Power Saving Functionality User's Guide is
to show users how to use the new Dynamic Power Saving Functionality supported in ALAXALA Networks
Corporation's AX6700S, AX6600S, and AX1240S model switches. It also provides examples of how toincorporate it as part of an energy saving network system that is friendly to the environment.
Relevant documents
x AX series product manual (http://www.alaxala.com/en/techinfo/manual/index.html)

Notes on using this document
The contents of this document reflect data obtained through basic operation in specific environments.
Functionality, performance, and reliability may vary in other operating environments and cannot be guaranteed.
Moreover, the data on power consumption and performance was obtained through testing under specificconditions in ALAXALA Networks' labs. Results obtained under different conditions and in otherenvironments may vary. The information herein is intended solely as a guide to assist those looking to build asystem incorporating ALAXALA products.
Unless otherwise noted, the information in this document applies to the following OS software versions andearlier:
AX6700S / AX6600S
Ver11.2
AX1240S
Ver2.1
Information in this document is subject to change without notice.
Export restrictions
If you export this guide, you must check and comply with all applicable laws, rules and restrictions of Japanand any other countries, such as Japan's Foreign Exchange and Foreign Trade Law and U.S. export control
laws and regulations.
Conventions: The terms "Switch" and "switch"
The term Switch (upper-case "S") is an abbreviation for any or all of the following models:x AX6700S series switchx AX6600S series switch
x AX1240S series switch
The term switch (lower-case "s") might refer to a Switch, another type of switch from the current vendor, or aswitch from another vendor. The context decides the meaning.
Trademarks
x The ALAXALA name and logo are trademarks or registered trademarks of ALAXALA Networks
Corporation.
x Ethernet is a product name of Xerox Corporation.
x Other company and product names in this manual are trademarks or registered trademarks of theirrespective owners.
Relevant switchesx AX6700S/AX6600S (version 11.2)
x AX1240S (version 2.1)
x AX2430S (version 11.1.A)

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

History of Amendments
EditionFirst
editionSecondedition

rev.
-

Date
5/29/2009

ChangesPublication of first edition

Location--

31/3/2010

A description of dynamic power saving functionality in a
scenario where an AX6700S is used as a core switch has
been added.
Compatible devices: AX6700S/AX6600S (Ver11.2)
Table 1.3-1 now shows the degree to which power
consumption is reduced by device type.
A description of the power savings achieved by the unused
port power saving functionality (AX1240S) has been
added.
Section 2.4: A description of using the scheduling function
to switch the dynamic power saving functionality has been
added.
Table 3.1-1 now shows the degree to which power
consumption is reduced by device type.
Scheduling for fiscal 2010 (from April 1st 2010 to March
31st 2011) has been added.
Messages and log entries have been updated for theAX6600S (Ver11.2).

2.2,
3.1-3.4, 3.8,
4.1, 4.2, 5.1
Preface1.3(1)The examples of power savings achieved now conform to
the NIF configuration in chapter 3.
"Explicitly specify the power control mode when setting
scheduled time ranges" has been added to the cautionary
notes for AX6700S/AX6600S.

4Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

1.3(6)

2.4

3.1(3)
3.4, 3.6
3.7

5.1(7)

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Contents
1. Green IT by ALAXALA .............................................................................................................................5
1.1

ALAXALA's approach to green IT: Finding ways to eliminate "wastefulness" ............................5

1.2

Dynamic power saving functionality lets you cut power to unused resources ............................6

1.3

Dynamic power saving functionality ............................................................................................7

2. Dynamic Power Saving Functionality and the Support Status........................................ 11
2.1

AX series dynamic power saving functionality and the support status .....................................11

2.2

AX6700S/AX6600S dynamic power saving functionality ..........................................................11

2.3

AX1240S dynamic power saving functionality ..........................................................................12

2.4

Scheduling function (scheduling the power saving functionality)..............................................13

3. Application Example of Power Saving Network System .................................................... 15
3.1Power saving network system overview ...................................................................................15

3.2

Configuration of power saving network system.........................................................................17

3.3

Configuring power saving on AX6700S/AX6600S backbone switches ....................................19

3.4

Example of an AX6700S/AX6600S configured as a backbone switch .....................................21

3.5

Configuring power saving on AX1240S floor switches .............................................................25

3.6

Example of AX1240S devices configured as floor switches .....................................................28

3.7

Checking settings and description of messages and log entries ..............................................30

3.8

Canceling schedules .................................................................................................................38

4. Power Saving Achieved in Application Example.................................................................... 40
4.1

Power savings at device level ...................................................................................................40

4.2

System-level power savings over a year...................................................................................42

5. Cautionary Notes .................................................................................................................................... 43
5.1

Notes on using AX6700S/AX6600S devices.............................................................................43

5.2

Notes on using AX1240S devices.............................................................................................44

Appendix 1: Configuration Files and Log Entries ........................................................................... 45

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

1. Green IT by ALAXALA
1.1

ALAXALA's approach to green IT: Finding ways to eliminate "wastefulness"

Energy efficiency has become a key concern for those in the IT industry. Owing to the ever-increasing traffic
volumes carried by data networks, the rapid increase in power consumption by equipment such as routers andLAN switches has emerged as a significant issue.
ALAXALA responded quickly to the need for power saving solutions in routers and LAN switches. For
example, ALAXALA managed to balance high performance and reduced power consumption by increasing theperformance of its processing engine through proprietary device technology and the adoption of an integrated
architecture.
ALAXALA also decided to see if anything could be done at the system level. The answer took the form ofdynamic power saving functionality, whose novel approach is to reduce power consumption by limiting power
during periods where the equipment goes unused. In doing so, ALAXALA's dynamic power saving functionality
solves the problem of "wastefulness" on networks.

Reduce overall power consumption by leaving the network only partially
active on nights and weekends
Minimize power consumption by reducing performance during time ranges with low traffic
AX6700S

AX6600S

BackboneswitchFloorswitchAX1240S

AX1240S

AX1240S

Reception

Conference rooms

Used

UnusedOfficesCut power to resources that are not in use

Weekend(Sun)

Thu

Late night

Wed

Late night

Tue

Late nightMon

Late night

Late night

Late night

Late nightTraffic volume

Sun

Weekend(Sat)

Weekdays (Mon To Fri)

Fri

Sat

Example of traffic volume over a week

Figure 1.1-1 Concept of dynamic power saving

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

1.2

Dynamic power saving functionality lets you cut power to unused resources

As a matter of course, standard electrical equipment like lighting and air conditioning is shut off when not inuse. In a networking context, although some systems require 24/7 uptime, there are many cases where only
partial operability is needed at night and on holidays.
For example, suppose that the hours from 00:00 to 06:00 on weekdays are considered late night hours, and
06:00 to 24:00 is considered daytime. Organizations like universities can have approximately 200 days off eachyear. Adding this to the late night hours on weekdays gives a time range of 5,790 hours, or approximately 2/3 ofthe 8,760 hours in a year, in which the network does not need to be operating at full capacity. Organizations thatclose for two days each week have approximately 130 days off each year, which when added to the late night
hours on weekdays, equates to 4,530 hours or almost half a year.
This led ALAXALA to change its way of thinking. The idea that further power savings could be realized by
cutting power or enabling power saving mode for resources that are not in use led to the development of
ALAXALA's dynamic power saving functionality.

Table 1.2-1 Key dynamic power saving functionality in AX series products
Location

ModelsFunctionality

Description

Backboneswitch

AX6700S
AX6600S

On-line switchover topower saving mode

Switches between normal power mode and powersaving mode without interrupting communication.

Standby switch unit
power-off function

Stops supplying power to standby units in a
redundant configuration.

Unused NIF and port
power-off function

Stops supplying power to unused NIFs and ports.

LED off function

Dynamic
powersavingScheduling function
FloorswitchAX1240S

Sleep function
Unused port powersaving function
LED brightness setting
function

Scheduling function

Turns off the LEDs at NIF ports.
Automatically controls the power saving
functionality at specific times on specific dates (ordays of the week).
Puts the device to sleep at specific times on
specific dates (or days of the week).
- Operates link-down ports in power saving mode
- Stops supplying power to unused ports
Changes the brightness of the LEDs to reduce
power consumption.
(full brightness/dimmed/off)
Automatically controls the power saving
functionality at specific times on specific dates (ordays of the week).

Eliminate wasted energy by supplying power to components that need it,
and reducing or cutting power to those that do not

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

1.3
(1)

Dynamic power saving functionality"On-line switchover to power saving mode" and "Standby switch unit power-off function"(AX6700S/AX6600S)

On-line switchover to power saving mode is a functionality that switches equipment from normal power mode
to power saving mode without any interruption to service. Power saving mode offers reduced power consumption,and is indicated by the SYSTEM2 LED. This LED is off in normal power mode, blinks green when transitioning
between modes, and is lit green when in power saving mode.
The standby switch unit power-off function reduces power consumption by stopping the supply of power tostandby units in a redundant switch configuration.
This functionality can be implemented on BSUs (AX6700S) or CSUs (AX6600S) in a redundant configuration.

On-line switchover to power saving mode
Active
BSU

Saves energy by lowering the operating clock frequency

 Reduces power consumption by curbing
excess performance

0100

Full operation

 Maintains communication during the transition

StandbyBSU
0

ActiveBSU

100

0

Hot standby

100

Eco mode

Normal modeStandbyBSU
0100

Cold standby

Power saving mode

to power saving mode
Curb performance + Cold standby

Standby switch unit power-off function

Power

Saves energy by turning off power to standby resources Stops supplying power to standby BSUs/PSPs (coldReducedstandby) Brings the standby BSU/PSP out of cold standby when theNormalPower saving

active BSU/PSP fails

Figure 1.3-1 Power saving mode and standby switch power-off (AX6700S/AX6600S)

On-line switchover to power saving mode and the standby switch unit power-off function can be used together.
There are two ways of combining these functions, as described in the table below. The table also shows the kindof energy savings that might be achieved by each method.

Table 1.3-1 Combinations of power saving modes in AX6700S/AX6600S and energy savings

MethodNormalpower mode
Method 1
Method 2#

On-line switchover
to power savingmode
Not used
Used
Used

Standby switch unit
(BSU/PSP) power-off function
Not usedNot used
Hot standby
Used
Cold standby

Potential energy
savings #-AX6708S: 10 to 20%
AX6608S: 5 to 15%
AX6708S: 20 to 50%
AX6608S: 10 to 30%

Switchover in the eventthe active BSU/PSP fails
Recovers quickly fromfailures
Recovers quickly fromfailures
Can take several minutes torestart BSU/PSP

How much energy is conserved depends on the type of device and line, the load conditions, and other factors.
This data was obtained through testing under specific conditions in ALAXALA Networks' labs. Results obtained under different
conditions may vary. Use this information as a guideline when choosing whether to implement this functionality.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(2)

Unused NIF and port power-off function (AX6700S/AX6600S)

The unused NIF and port power-off function can reduce power consumption by stopping the supply of power
to unused NIFs and ports.
(3)

LED off function (AX6700S/AX6600S)

The LED off function can turn off all the NIF port LEDs.
If you enable this function, you can still check the operating status of the ports by pressing any key on thesystem operation panel. The LEDs turn off again 60 seconds after the key is pressed.
(4)

Scheduling function (AX6700S/AX6600S)

You can control the power saving functionality automatically by using the scheduling function to designate thetime ranges in which it operates. Time ranges can be defined by specifying a date or day of the week and a time
range.

[AX6700S/AX6600S] Scheduling function
Controls power saving functionality according to a set schedule Scope of scheduling function
9 On-line switchover to power saving
Shifts back tonormal mode atscheduled time

Enters powersaving mode atscheduled timemode

9 Standby switch unit power-off
function

9 Unused NIF and port power-off
function

9 NIF port LED off function

Power use

Reduced Schedule power saving mode for specificdates and times, certain days of the week,
or every day

M TWT F S S
Figure 1.3-2 Scheduling function (AX6700S/AX6600S)(5)Sleep function (AX1240S)

The sleep function greatly reduces power consumption by putting the device to sleep within scheduled time
ranges. When the device is in sleep mode, the PWR LED blinks slowly in green, and all features from switching
to remote access are disabled. Upon entering a normal time range, the device wakes from sleep mode and comesback online.
Potential energy savings: Approximately 70% (for AX1240S-24T2C) ##How much energy is conserved depends on the type of device and line, the load conditions, and other factors.
This data was obtained through testing under specific conditions in ALAXALA Networks' labs. Results obtained under different
conditions may vary. Use this information as a guideline when choosing whether to implement this functionality.

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(6)

Unused port power saving function (AX1240S)(1) Link-down port power saving operation
This function reduces power consumption by operating link-down ports in power saving mode.
You cannot apply this function to optical ports.
Potential energy savings:
A difference of approximately 13% # when this function is enabled in a AX1240S-24T2C
model on which all 24 ports are down.
(2) Deactivating ports (settings for port deactivation)
This function reduces power consumption by stopping the supply of power to unused ports.
Potential energy savings:
A difference of approximately 13% # when this function is enabled in a AX1240S-24T2C
model on which all 24 ports are disconnected.

Unused port power saving function
Saves energy by controlling the supply of power to ports(1) Feature that automaticallyplaces link-down ports in
power saving mode
Conventional switch

Unused

0

100

フル稼働

AX1240S

Power used

Link
Up

(2) Feature that shuts down
ports

Used

E.g. PoE floor
switch or wirelessAP

Power used

Link
Up

0

100

Conserves energy by stopping power
supply to ports that are never used or
are unused during scheduled time
ranges

フル稼働

Power used
0100Power used

Link
Dow

0

Supply of poweris stopped tounused ports

100

With all ports downPower

Consumes
power when
not in use
Link
Dow

ReducedDisabled

EnabledA "conventional switch" means a switch that does not support the unused port power saving function.

Figure 1.3-3 Unused port power saving function (AX1240S)#

How much energy is conserved depends on the type of device and line, the load conditions, and other factors.
This data was obtained through testing under specific conditions in ALAXALA Networks' labs. Results obtained under different
conditions may vary. Use this information as a guideline when choosing whether to implement this functionality.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(7)

LED brightness setting function (AX1240S)

This function reduces power consumption by changing the LED brightness.
You can configure this function to display the LEDs at normal brightness, dimmed, or not at all. You can also
configure the function to automatically switch between the three brightness levels in certain scenarios.

(8)

Scheduling function (AX1240S)

The scheduling function simplifies operation by automatically controlling the power saving functionality basedon time ranges. You can define time ranges by specifying a date or day of the week and a start and end time.

[AX1240S] Scheduling function
Controls power saving functionality according to a set schedule

Enters powersaving mode atscheduled time

Shifts back tonormal modeat scheduledtime Scope of scheduling function
9 LED brightness setting function
9 Unused port power saving function
9 Scheduled sleep function
 Schedule power saving mode for specificdates and times, certain days of the week, or
every dayPower use

ReducedM T W T F S S

Figure 1.3-4 Scheduling function (AX1240S)

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

2. Dynamic Power Saving Functionality and the Support Status
This chapter describes which dynamic power saving functionality is supported by each AX series product.

2.1

AX series dynamic power saving functionality and the support status
The following table lists the major dynamic power saving functionality and the support status.

Table 2.1-1 List of major dynamic power saving functionality and the support status
Model

Backbone switch
Floor switch

Dynamic
power
Savingfunctional
ity

AX6700S

AX6600S

AX6300S

AX3600S

AX2400S

AX1240S

AX1230S

N

N

N

--

N

CommonSwitchover to thepower saving mode
onlineY#1

Y#2

Standby switch unit
power-off function

Y

Y

--

Unused NIF and port
power-off function

Y

Y

--

LED off function

Y

Y

--

LED brightness
setting function

--

--

Y

Unused port powersaving function

--

--

Y

Sleep function

--

--

Y

Scheduling function

Y

Y

Y

(Legend: Y: Supported, N: Not support the dynamic power saving functionality, --: Not fall under this category#1: When using two or more BSUs
#2: When using two CSUs

2.2

AX6700S/AX6600S dynamic power saving functionality

Depending on the purpose, you can select the AX6700S series switch or an AX6600S series switch as a
backbone switch. The AX6700S series switch can contain up to three BSUs and provides high-switching
performance and high-packet processing performance. The AX6600S series switches contain up to two CSUs per
switch and are compact.
Table 2.2-1 shows the major dynamic power saving functionality of the AX6700S and AX6600S series
switches. By installing two or more BSUs or CSUs to switch power control, the dynamic power saving function,
which switches the mode to the power saving mode online, becomes available. In addition to this, the standby
switch units (BSUs or a CSU) can be used in hot standby mode, or can be used in cold standby mode by using"the standby switch unit power-off function".
Moreover, "the NIF and port power-off function", which stops supplying power to unused NIFs and ports, and"the LED off function", which turns off the LED of the port, can be used together.
You can configure settings so that the power saving functionality can operate continuously, or can schedule thetime range when a switch operates in the power saving mode by using the scheduling function.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Table 2.2-1 Major dynamic power saving functionality of AX6700S/AX6600S series switches
Power saving
functionality

Term in manuals

FeaturesSwitchover to thepower saving mode
online

BSU/PSP power
control#1

Performs switchover between normal power mode and powersaving mode without restarting the switches.
The power consumption is reduced but the transfer
performance is decreased in power saving mode#2.

Standby switch unit
power-off function(Standby switch units
in cold standby)

Standby BSU/PSP
power-off#1(Standby BSU/PSP incold standby 2)

Further reduces the power consumption. However it takes timeto switch systems when an error occurred on an active BSU orPSP.

NIF and port
power-off function

NIF and port powerOFF

Stops supplying power to unused NIFs and ports to reduce
power consumption.

LED off function

NIF port LED OFF

Turns off the LED of the NIF port to reduce power consumption.

Scheduling function

Scheduling

Schedules the time range when the power saving functionality
is operated.

#1: For AX6700S: Enabled when two or more BSUs are installed.
For AX6600S: Enabled when two CSUs are installed.
PSP (Packet Switching Processor) is a part of a CSU.
#2: Packet processing performance is reduced to about 50 % (compared with it in normal power mode).
However, this value varies depending on the types and the numbers of installed BSUs, CSUs, and NIFs, theload conditions, and other causes

2.3

AX1240S dynamic power saving functionality

The table 2.3-1 shows the major dynamic functionality of the AX1240S series switches.
The "LED brightness setting" function, which changes the LED brightness, and the "unused port powersaving" function can be used together.
In addition, you can specify settings so that the power saving functionality can operate continuously, or canschedule the time range when a switch operates in the power saving mode by using the scheduling function.
You can also specify the time range when a switch is in the sleep status by using both the scheduling function
and the sleep function.

Table 2.3-1 Major dynamic power saving functionality of the AX1240S series switches
Power saving
functionality
Sleep function

Unused port powersaving function

Term in manual
Sleep mode
Port
power
savingFeatures
Brings the switches into sleep status to reduce
power consumption.

Link-down port
power saving
operation

Changes the status to the power saving status by
disconnecting the LAN cable and turning off thepower of the connection destination.

Deactivating ports(Settings fordeactivate ports)

Stops supplying power to unused pots to reduce
power consumption.

LED brightness setting
function (normalbrightness/lower
brightness/off)

LED behavior(normal brightness/powersaving brightness/OFF)

Changes the brightness of the LED to reduce power
consumption.
You can also specify the settings for automaticallychanging the brightness.

Scheduling function

Scheduling

Schedules the time range when the power saving
functionality operates.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

2.4

Scheduling function (scheduling the power saving functionality)

AX6700S, AX6600S, and AX1240S series switches can use the scheduling function to execute the scheduled
power saving function. The scheduling function allows you to specify a combination of the power saving
functionality and up to 50 time periods during which they are to be run. When the specified start time arrives, thepower saving functionality automatically starts and changes the Switches to power saving status. When thespecified end time arrives, normal time range settings are automatically recovered.
The time periods during which the power saving functionality is enabled are referred to as the scheduled time
range and the time periods during which the power saving functionality is not enabled are referred to as thenormal time range.
A combination of the power saving functionality settings shown in Tables 2.4-1 to 2.4-3 must be specified forthe scheduled time range and the normal time range, respectively. When the scheduled time range starts, the all of
the settings for the scheduled time range are activated, and those for the normal time range are deactivated. Whenthe scheduled time range is reached, the all of the settings are switched to the settings for the normal time range.
A combination of the power saving functionality settings once determined for the scheduled time range isapplied to all of the scheduled time range entries. Therefore, it is not possible to specify a different combinationof the power saving functionality settings for each entry.
The settings for the normal time range are not automatically inherited by the settings for the scheduled time
range, and vice versa. Therefore, you must configure the settings for the scheduled time range and the normal
time range respectively with care. If commands are omitted, default commands are executed.

Table 2.4-1 Power saving settings by using the AX6700S scheduling function and command
names
Mon. to Fri. Mon. to Fri.
Mon. to Fri.
23:59 0:00 late night
5:59

Mon. to Fri.
6:00

(Example)

Normal time range

Scheduling
Entry 1

Settings
BSU power control
mode

Normal time range
power-control mode
(default: normal: Normal power)

Active BSUs

redundancy max-bsu(default: The number of active BSUs is 3.)

Standby BSU
power supply off

redundancy standby-bsu(default: hot: The power supply is on.)no power enable nif(default: The power supply is on.)shutdown(default: The power supply is on.)system port-led(default: enable: LED is normally lit.)

Unused port power
supply off
LED of the NIF port

23:59

Scheduling
Entry 2Up to 50 scheduled time range
entries can be set.
However, the power saving
functionality settings arecommon to the entries.

AX6700

Unused NIF
power supply off

Weekends
0:00

Scheduled time range
schedule-power-control mode
(default: mode2: BSUs are switched to powersaving mode.)schedule-power-control max-bsu(default: The number of active BSUs is 1. The
other BSUs are for standby)schedule-power-control standby-bsu(default: cold2: The power supply is off.)schedule-power-control shutdown nif(default: The power supply is on.)schedule-power-control
shutdowninterface (default: The power supply is on.)schedule-power-control port-led(default: disable: LED is turned off.)

The name of the command to set a scheduled time range entry: schedule-power-control time-range
The number of scheduled time range entries: 50
The power saving functionality applies thesecommand settings during scheduled time ranges.
A scheduled time range cannot be specified for eachfunction separately.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Table 2.4-2 Power saving settings by using the AX6600S scheduling function and command
names
Settings
PSP power control
mode

Normal time range
power-control mode
(default: normal: Normal power)

Active PSPs

redundancy max-psp(default: All PSPs are activated.)StandbyPSP
power supply off

redundancy standby-psp(default: hot: The power supply is on.)no power enable nif(default: The power supply is on.)Shutdown(default: The power supply is on.)

Unused NIF power
supply off
Unused port power
supply off
LED of the NIF portsystem port-led(default: enable: LED is normally lit.)

Scheduled time range
schedule-power-control mode
(default: mode2: PSPs are switched to powersaving mode.)schedule-power-control max-bsu(default: The number of active PSPs is 1. The
other PSP is for standby)schedule-power-control standby-psp(default: cold2: The power supply is off.)schedule-power-control shutdown nif(default: The power supply is on.)schedule-power-control
shutdowninterface(default: The power supply is on.)schedule-power-control port-led(default: disable: LED is turned off.)

The name of the command to set a scheduled time range entry: schedule-power-control time-range
The number of scheduled time range entries: 50

Table 2.4-3 Power saving settings by using the AX1240S scheduling function and command
names
Settings
Link-down port
power saving
operation

Normal time range
power-control port cool-standby(default: Normal power)

Deactivating ports

shutdown(default: The power supply is on.)LED behavior

system port-led(default: enable: LED is normally lit.)

Scheduled time range
schedule-power-control portcool-standby(default: Normal power)
schedule-power-control shutdown
interface(default: The power supply is on.)schedule-power-control port-led(default: economy: The LED brightness is
reduced.)The name of the command to set a scheduled time range entry: schedule-power-control time-range
The number of scheduled time range entries: 50

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

3. Application Example of Power Saving Network System
This chapter uses an example of a network system to describe a recommended implementation of dynamic
power saving functionality.

3.1

Power saving network system overview

This section explains how to apply the dynamic power saving functionality by using Figure 3.1-1 Example of asystem configuration.
(1)

Example of a network system configuration (using a university as an example)• Server switch in a server room: AX2430S x 1• Backbone switch: AX6708S fault tolerant switch x 1 or AX6608S fault tolerant switch x 1
The AX6708S fault tolerant switch has three BSUs in a redundant configuration.
The AX6608S fault tolerant switch has two CSUs in a redundant configuration.
• Total number of switches installed in 40 classrooms, 2 office rooms, and 18 laboratories: AX1240S x 60
(installing a switch per floor)
Using dynamic power saving functionality
Server room

Operates at full capacity
Server switch

AX2430S
10G

Performance is reduced at nights and on weekends
when traffic drops sharply

Backbone switch

AX6708S
or
AX6608S

Fault-tolerant
switchLate nights (0:00 to 6:00) and holidays:
On-line switchover to power saving modeStandby CSU in hot standby mode
Operates in normal mode during daytime hours(6:00 to 24:00)

1GE

Total number of AX1240S: 60 switches

Floor switches

Selectively implement powersaving functionality
Classroom

OfficeLaboratories

40 floors

2 floors

18 floors

Completely unused late at night and on
holidays
Power saving at device level throughscheduled sleep function

When offices are potentially used forovertime and holiday work:
Use unused port power saving function
for offices that are in use
Schedule sleep mode for switches inunused offices

You cannot define times in which laboratories
are unused (it is common for lights to be on
24/7)
Use unused port power saving function to set
ports to power saving mode only whenconnected PCs are turned off：Link aggregation
Monday0Server room

Middle ofnight

Tuesday6

Wednesday

Weekday daytime

ThursdayFriday0

Middle of
night

24

Operation in normal mode

Saturday6

SundayWeekend daytime

24

Operation in normal mode

Backbone

Power saving
mode

Operation in normal mode

Power saving mode

Classrooms

Sleep mode

Operation in normal mode

Sleep mode

Office rooms

Operation in normal mode

Operation in normal mode

Laboratories

Operation in normal mode

Operation in normal mode

Figure 3.1-1 Using the dynamic power saving functionality

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15

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(2)

Example of an operation policy for each switch

First, decide on the policy for how the switches will operate, considering the usage of each switch.
• The AX2430S server switch performs full operation for 24 hours a day because the server switch is used
at any time 24 hours a day.
• The backbone AX6708S or AX6608S switch is switched to power saving mode, in which the performanceis reduced, during the middle of the night (0:00 to 6:00) and weekends.
During daytime hours (6:00 to 24:00), the switch operates in normal mode.
• On the AX1240S individual floor switches, power saving functions are implemented as the situation
demands. That is, switches in classrooms enter sleep mode late at night and on holidays, while switches in
offices and laboratories are always on.
(3)

Using dynamic power saving functionality on the backbone switch (AX6708S/AX6608S)

Dynamic power saving functionality offers a variety of modes and functions. First, we need to decide
which combination best suits this example.
Dynamic power saving functionality offered in AX6700S/AX6600S series devices:- On-line switchover to power saving mode
- Standby switch unit power-off function- Unused NIF and port power-off function- NIF port LED off- Scheduling function
On-line switchover to power saving mode and the standby switch unit power-off function can be used together.
There are two ways of combining these functions, as described in the following table 3.1-1.

Table 3.1-1 Combinations of power saving modes in the AX6700S/AX6600S series
On-line switchover
to power saving
mode
Used

Standby switch
unit (BSU/PSP)
power-off function
Not used
Hot standby
Used
Cold standby

Switchover characteristics andexpected switching speeds in theevent the active BSU/PSP fails (*1)
Method 1
AX6708S: 10 - 20%
Recovers quickly from failures
AX6608S: 5 - 15%
5 milliseconds or less
Method 2
Used
AX6708S: 20 - 50%
Can take several minutes to restart
AX6608S: 10 - 30%
standby BSU/PSP
AX6708S:
0.7 to 1.5 minutes (with OSPF
disabled)
AX6608S:
0.5 to 2 minutes (with OSPF
disabled)(*1) Measured through testing of a specific configuration. Results obtained with different devices and under different
conditions may vary.
Potential energy
savings(*1)

The example in this chapter will use the more basic method 1 (on-line switchover to power saving mode + hotstandby), which reduces power consumption to an extent and performs node switching with minimal effect on
operation.
Standard hours
Nights/holidays

Normal mode
LK Switch
Power saving mode+

Hot standby+

Hot standby

The unused NIF and port power-off function will be used to stop the backbone switch from supplying power to
NIFs 3 to 6 (which connect to the 40 floors of classrooms) when in power saving mode. The LEDs of these NIF
ports will also be turned off.

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16

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(4)

Using dynamic power saving functionality in floor switches (AX1240S)

Dynamic power saving functionality offered on AX1240S series devices:- LED brightness setting function (dimmed or off)
- Unused port power saving function (link-down port power saving operation, deactivating ports(port deactivation settings))- Sleep function- Scheduling function
For the application example in this chapter, to achieve the greatest possible energy savings, LEDs will bedimmed at all times on floor switches, and the unused port power saving function (link-down port power saving
operation and port deactivation) will be implemented. Switches on floors that are not used at night or on holidays
will be set to sleep mode during these times.

Standard hours

Normal mode+

Set LED brightness
to dimmed+

Unused port powersaving function

LKSwitch
Nights/holidays

3.2

Sleep mode

Configuration of power saving network system

Figure 3.2-1 (using an AX6708S as the backbone switch) and figure 3.2-2 (using an AX6608S as the backbone
switch) show examples of the logical configuration of the example network. In these examples, ports 21 to 24 ofeach AX1240S device are unused as they are reserved for future use.

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

17

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Servers

Server switch (S1):
AX2430S-24T2X

0/1-12
0/13-24
VLAN10 VLAN20
S1: AX2430S
VLAN10,20
0/25-26
10 GbE
LAG61
1/1, 2/1
VLAN10,20

Backbone switch (B1): AX6708S
B1: AX6708S

ACT

BCU (x1)

SBY

NIF1

NIF2

NIF3

NIF4

ACT

BSU (x1)

ACT

BSU (x2)

SBY

BSU (x3)
NIF5

NIF6

NIF7

NIF8

VLAN101
3/1, 4/1
LAG1
1 GbE

AX6708S installed modules

BCU (x2)

Product code
AX6708S
PS-A11BCU-S11

Description
Chassis & FAN
Power supply
Controller

Qty.
1
8
2

BSU-LA

Forwarding unit

3

10 GbE×4 NIF
2NK10G-4RX
6
NK1G-24S 1 GbE SFP×24 NIF
Double-acting BSUs with standby unit in hot standby
10 GbE modules: XFP-SR, 1GSFP modules: SFP-SXVLAN120
3/20, 4/20
LAG20

VLAN121
5/1, 6/1
LAG21

VLAN140
5/20, 6/20
LAG40

VLAN141
7/1, 8/1
LAG41

VLAN160
7/20, 8/20
LAG60

Floor switches (A1 toA60): AX1240S-24T2C
A1:

0/25-26

AX1240S

VLAN101
0/1-20A20:

0/25-26

AX1240SA21:

0/25-26

AX1240S

VLAN120
0/1-20

VLAN121
0/1-20A40:

0/25-26

AX1240S

VLAN140
0/1-2040 switches
A1 to A40
for 40 classrooms

A41:

0/25-26

AX1240S

A60:

0/25-26

AX1240S

VLAN141
0/1-20

VLAN160
0/1-202 switches
A41 to A42
for 2 offices

18 switches
A43 to A60
for 18laboratories

Figure 3.2-1 Logical configuration with an AX6708S as a backbone switch

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18

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Servers

Server switch (S1):
AX2430S-24T2X

0/1-12
0/13-24
VLAN10 VLAN20
S1: AX2430S
VLAN10,20
0/25-26
10 GbE
LAG61
1/1, 2/1
VLAN10,20

Backbone switch (B1): AX6608S
B1: AX6608S

NIF1

AX6608S installed modules

NIF2

Product code
AX6608S
PS-A11

Description
Qty.
Chassis & FAN
1Power supply
8
Controller and2
CSU-1A
forwarding unit
10 GbE×4 NIF
2NK10G-4RX
6
NK1G-24S 1 GbE SFP×24 NIF
Single-acting CSU with standby unit in hot standby
10 GbE modules: XFP-SR, 1GSFP modules: SFP-SX

NIF4

NIF3

ACT

CSU (x1)

SBY

CSU (x2)
NIF5

NIF6

NIF7

NIF8

VLAN101
3/1, 4/1
LAG1
1 GbE

VLAN120
3/20, 4/20
LAG20

VLAN121
5/1, 6/1
LAG21

VLAN140
5/20, 6/20
LAG40

VLAN141
7/1, 8/1
LAG41

VLAN160
7/20, 8/20
LAG60

Floor switches (A1 to A60): AX1240S-24T2C
A1:

0/25-26

AX1240S

A20:

0/25-26

AX1240S

VLAN101
0/1-20

VLAN120
0/1-20A21:

0/25-26

AX1240S

VLAN121
0/1-20A40:

0/25-26

AX1240S

VLAN140
0/1-2040 switches
A1 to A40
for 40 classrooms (one per floor)

A41:

0/25-26

AX1240S

A60:

0/25-26

AX1240S

VLAN141
0/1-20

VLAN160
0/1-202 switches
A41 to A42
for 2 offices(one per floor)

18 switches
A43 to A60
for 18 laboratories(1 per floor)

Figure 3.2-2 Logical configuration with an AX6608S as a backbone switch

3.3

Configuring power saving on AX6700S/AX6600S backbone switches
There are seven steps to implementing the dynamic power saving functionality for this example.
A time range such as nights and weekends in which power saving is scheduled is referred to as a scheduled

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
time range. A time range such as daytime on a weekday when power saving is not scheduled is called a normal
time range.
(1) [Power saving in normal time range] Use the power-off function to reduce power consumption.
(2) Schedule power saving functionality for nights and holidays using the scheduling function.
(3) [Power saving in scheduled time range] Set the power control mode to dynamic power saving mode.
(4) [Power saving in scheduled time range] Set the number of active BSUs/PSPs and the operating mode of thestandby BSU/PSP.
(5) [Power saving in scheduled time range] Set the power-off function that applies for both normal and scheduled
time ranges.
(6) [Power saving in scheduled time range] Configure the NIF power-off and LED off functions.
(7) Specify scheduled time ranges using a simple approach.

Each step is described in detail below.

(1)[Power saving in normal time range] Use the power-off function to reduce power consumption.

Set the power control mode for normal time ranges to normal, specify the number of active BSUs/PSPs, andconfigure the operating mode of standby BSUs/PSPs. Then, to save power in normal time ranges, configure theswitches to stop the supply of power to unused NIFs and ports as needed.
Use the no power enable command to designate NIFs as unused, and the shutdown command todesignate ports as unused.
Because the example in this chapter has no unused NIFs during normal time ranges, only the unused port
power saving function will be used.

(2)

Schedule power saving functionality for nights and holidays using the scheduling function.

You can save power on the backbone switch by switching it to power saving mode at times like nights andholidays when fewer packets are in transit and performance is not an issue. If you intend to switch between
normal and power saving modes on a regular basis, you can use the scheduling function to automate the process.
Scheduling is configured separately from normal time ranges using the following set of commands. The
purpose of each command is described in (3) onwards.
schedule-power-control max-bsu: Number of BSUs active during scheduled time ranges [AX6700S]
schedule-power-control max-psp: Number of PSPs active during scheduled time ranges [AX6600S]
schedule-power-control standby-bsu: Operating mode of standby BSU in scheduled time ranges [AX6700S]
schedule-power-control standby-psp: Operating mode of standby PSP in scheduled time ranges [AX6600S]
schedule-power-control port-led: Control of NIF port LEDs in scheduled time ranges
schedule-power-control shutdown : Control power to unused NIFs and ports in scheduled time ranges
schedule-power-control mode
: Power control mode used by power saving functionality in scheduled
time ranges.
schedule-power-control time-range : Sets dates, times, and other properties that govern when the above
features operate.
(3)[Power saving in scheduled time range] Set the power control mode to dynamic power saving mode.

Use the schedule-power-control mode command to set the power control mode used by the powersaving functionality.
Specify mode2 to switch dynamically to power saving mode without any downtime.
After specifying the above mode, a message appears prompting you to confirm the power control mode. Entery to apply the setting.
(4)[Power saving in scheduled time range] Set the number of active BSUs/PSPs and operating modes ofstandby BSU/PSP.

When you use the scheduling function, you can use the schedule-power-control max-bsu andCopyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

20

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)schedule-power-control max-psp commands to set the number of active BSUs and PSPs.
You can then use the schedule-power-control standby-bsu and schedule-power-control
standby-psp commands to set the operating mode of the standby BSUs and PSPs. The example in this chapter
uses hot standby as its operating mode, so specify hot. To use cold standby, specify cold2.

(5)[Power saving in scheduled time range] Set the power-off function that applies for both normal andscheduled time ranges

Use the schedule-power-control shutdown command to configure the power-off function for theunused NIFs and ports that you want to be retained even after the device transitions from a normal time range to ascheduled time range. If you neglect to do so, unused NIFs and ports lose their shutdown attribute and draw
power in scheduled time ranges.
The functions and commands are as follows:- Unused NIF power-off: Set by schedule-power-control shutdown nif
Specify a single NIF by using the nif parameter of the schedule-power-control shutdown
command.
To specify multiple NIFs, enter the command individually for each NIF.
- Unused port power-off: Set by schedule-power-control shutdown interface [{add | remove}]
Use the interface parameter of the schedule-power-control shutdown command to
specify ports. You can specify multiple ports in one operation. If the command spans multiple lines, use
the add parameter for the second and subsequent items. You can disable the function for selected portsby executing the command with the remove parameter specified.

(6)[Power saving in scheduled time range] Configure the NIF power-off and LED off functions.

Configure NIF-related power saving functionality that applies only to scheduled time ranges.
The commands that configure scheduled power saving functionality for NIFs are as follows:- NIF port LED off: Set by schedule-power-control port-led- Unused NIF power off: Set by schedule-power-control shutdown nif- Unused port power off: Set by schedule-power-control shutdown interface [{add |remove}](7)

Specify scheduled time ranges using a simple approach.

Use schedule-power-control time-range commands to specify a maximum of 50 time ranges inwhich scheduled power saving functionality operates. You can use this command to implement power saving
functionality on specific dates, certain days of the week, or every day. Make sure that the start and end times of atime range are separated by at least 30 minutes.
To avoid complexity, we recommend that you take a simple approach to configuring schedules using only
enable for the action parameter, by specifying daily time ranges first, then days of the week, and finallyspecific dates.
The disable option of the action parameter can be used to disable a schedule for a specified duration.
If the time range you specify overlaps with an enable parameter, action disable takes precedence. This
also lets you disable power saving mode in a scheduled time range at short notice should the need arise. We
recommend you leave the final entry (entry 50) in the schedule-power-control time-range command
blank for this purpose.

3.4

Example of an AX6700S/AX6600S configured as a backbone switch

In this example, late night hours and holidays (weekends, public holidays, and extended breaks) are defined asshown in table 3.4-1. Described below is an example of a configuration that implements dynamic power saving
functionality in AX6700S/AX6600S devices. See Appendix 1 for an overview of the network configuration.

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21

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Table 3.4-1 Example of scheduled time ranges
Scheduling for fiscal 2009 and 2010 (April 1 2009 to March 31 2011)
Item
Daily schedule
Weekly schedule

2009 public
holidays2009
extendedbreaks2010 public
holidays2010
extendedbreaksDescription
Late night hours
Saturday and Sunday
Public holiday on 4/29/2009
Public holiday from 5/3/2009 to substituteholiday 5/6/2009
Public holiday on 7/20/2009
Public holiday on 9/21/2009 to 9/23/2009
Public holiday on 10/12/2009
Public holiday on 11/3/2009
Substitute holiday on 11/23/2009
Public holiday on 12/23/2009
Public holiday on 1/1/2010
Public holiday on 1/11/2010
Public holiday on 2/11/2010
Substitute holiday on 3/22/2010
Summer break (7/24/2009 to 9/13/2009)
Winter break (12/23/2009 to 1/6/2010)
Spring break (4/1/2009 to 4/2/2009)
Spring break (2/11/2010 to 3/31/2010)
Public holiday on 4/29/2010
Public holiday on 5/3/2010 to 5/5/2010
Public holiday on 7/19/2010
Public holiday on 9/20/2010
Public holiday on 9/23/2010
Public holiday on 10/11/2010
Public holiday on 11/3/2010
Public holiday on 11/23/2010
Public holiday on 12/23/2010
Public holiday on 1/1/2011
Public holiday on 1/11/2011
Public holiday on 2/11/2011
Public holiday on 3/21/2011
Summer break (8/1/2010 to 9/20/2010)
Winter break (12/23/2010 to 1/10/2011)
Spring break (4/1/2010 to 4/2/2010)
Spring break (2/11/2011 to 3/31/2011)

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

#
1
2
3
4

Date and time
start-time0000
sat 0000
090429 0000
090503 0000

end-time
0600
mon 0000
090430 0000
090507 0000

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

090720 0000
090921 0000
091012 0000
091103 0000
091123 0000
091223 0000
100101 0000
100111 0000
100211 0000
100322 0000
090724 0000
091223 0000
090401 0000
100211 0000
100429 0000
100503 0000
100719 0000
100920 0000
100923 0000
101011 0000
101103 0000
101123 0000
101223 0000
110101 0000
110111 0000
110211 0000
110321 0000
100801 0000
101223 0000
100401 0000
110211 0000

090721 0000
090924 0000
091013 0000
091104 0000
091124 0000
091224 0000
100102 0000
100112 0000
100212 0000
100323 0000
090914 0000
100107 0000
090403 0000
100401 0000
100430 0000
100506 0000
100720 0000
100921 0000
100924 0000
101012 0000
101104 0000
101124 0000
101224 0000
110102 0000
110112 0000
110212 0000
110322 0000
100921 0000
110111 0000
100403 0000
110401 0000

22

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(1)

Device B1 (AX6608S)

Table 3.4-2 shows an example of the configuration of power saving functionality on the AX6700S/AX6608S
device serving as a backbone switch (device B1), in normal time ranges (normal power mode) and scheduled
time ranges (power saving mode).

Table 3.4-2 Example of an AX6700S/AX6608S power saving functionality configuration
Item
Number of active BSUs/PSPs
Number of standby BSUs/PSPs
BSU/PSP power control mode
Power supply to standby
BSU/PSPPower supply to NIFs and ports

NIF port LEDs

Status in normal time ranges(normal power mode)
BSU=2, PSP=1
1
Normal power
ON (hot standby)

Status in scheduled time ranges(power saving mode)
BSU=2, PSP=1
1
BSU/PSP power saving
ON (hot standby)

All NIFs are ON
Ports 2 to 4 of NIFs 1 to 2 are OFF
Ports 21 to 24 of NIFs 3 to 8 are OFF
Lit

NIF3 to NIF6 are OFF
Ports 2 to 4 of NIFs 1 to 2 are OFF
Ports 21 to 24 of NIFs 3 to 8 are OFF
Off

B1 (AX6708S/AX6608S) configuration[Configuration of power saving functionality in normal time ranges]
Set the power control mode to normal(config)# power-control mode normal

Sets the power control mode to normal for normal time
ranges.

Set the number of active BSUs/PSPs(config)# redundancy max-bsu 2[AX6708S] Sets the number of active BSUs in normal
time ranges to 2.

(config)# redundancy max-psp 1[AX6608S] Sets the number of active PSPs in normal time
ranges to 1.

Set the operating mode of standby BSUs/PSPs(config)# redundancy standby-bsu hot(config)# redundancy standby-psp hot
Configure power saving operation for unused ports(config)# interface range tengigabitethernet 1/2-4,
tengigabitethernet 2/2-4(config-if-range)# shutdown(config-if-range)# top(config)# interface range gigabitethernet 3/21-24,
gigabitethernet 4/21-24, gigabitethernet 5/21-24,
gigabitethernet 6/21-24, gigabitethernet 7/21-24,
gigabitethernet 8/21-24(config-if-range)# shutdown(config-if-range)# top

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

[AX6708S] Sets the operating mode of standby BSUs innormal time ranges to hot standby.
[AX6608S] Sets the operating mode of standby PSPs innormal time ranges to hot standby.
Stops the supply of power to unused ports.
Ports 2 to 4 of NIFs 1 and 2

Ports 21 to 24 of NIFs 3 and 8

Important points on constructing a system 3.3(1)23

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
B1 (AX6708S/AX6608S) configuration[Configuration of power saving functionality in scheduled time ranges]
Set the power control mode to dynamic power saving for BSUs/PSPs in scheduled time ranges(config)# schedule-power-control mode mode2
BSU and NIF might be restarted automatically when the modeis changed.
Do you wish to change mode (y/n): y[AX6708S] Sets the power control mode of BSUs to
dynamic power saving mode (mode2).
A confirmation message appears. Enter y to confirm thechange.
Important points on constructing a system 3.3(3)(config)# schedule-power-control mode mode2
PSP and NIF might be restarted automatically when the modeis changed.
Do you wish to change mode (y/n): y[AX6608S] Sets the power control mode of PSPs todynamic power saving mode (mode2).
A confirmation message appears. Enter y to confirm thechange.
Important points on constructing a system 3.3(3)Set the number of active BSUs/PSPs in scheduled time ranges(config)# schedule-power-control max-bsu 2[AX6708S] Sets the number of active BSUs in scheduled
time ranges to 2.
Important points on constructing a system 3.3(4)(config)# schedule-power-control max-psp 1[AX6608S] Sets the number of active PSPs in scheduled
time ranges to 1.
Important points on constructing a system 3.3(4)Set the operating mode of standby BSUs/PSPs in scheduled time ranges(config)# schedule-power-control standby-bsu hot[AX6708S] Specifies hot standby as the operating modefor standby BSUs in scheduled time ranges.
Important points on constructing a system 3.3(4)(config)# schedule-power-control standby-psp hot[AX6608S] Specifies hot standby as the operating modefor standby PSPs in scheduled time ranges.
Important points on constructing a system 3.3(4)Set power saving operation for unused ports in scheduled time ranges (to be carried over from normal time ranges)(config)# schedule-power-control shutdown interface
Stops the supply of power to unused ports.
gigabitethernet 3/21-24, gigabitethernet 4/21-24,
Ports 21 to 24 of NIFs 3 to 8, ports 2 to 4 of NIFs 1 and 2
gigabitethernet 5/21-24, gigabitethernet 6/21-24,
gigabitethernet 7/21-24, gigabitethernet 8/21-24,
Important points on constructing a system 3.3(5)tengigabitethernet 1/2-4, tengigabitethernet 2/2-4
Configure NIF port LEDs to turn off in scheduled time ranges(config)# schedule-power-control port-led disable

Disables the LEDs for NIF ports.

Important points on constructing a system 3.3(6)Configure unused NIF power off function in scheduled time ranges(config)# schedule-power-control shutdown nif 3
Stops the supply of power to NIF 3.
(config)# schedule-power-control shutdown nif 4
Stops the supply of power to NIF 4.
(config)# schedule-power-control shutdown nif 5
Stops the supply of power to NIF 5.
(config)# schedule-power-control shutdown nif 6
Stops the supply of power to NIF 6.

Important points on constructing a system 3.3(6)Configure the scheduled time ranges(config)# schedule-power-control time-range 1 everyday
start-time 0000 end-time 0600 action enable

Configures power saving functionality to operate every
day from 0:00 to 6:00.

(config)# schedule-power-control time-range 2 weekly
start-time sat 0000 end-time mon 0000 action enable

Configures power saving functionality to run all day on
weekends (0:00 on Saturday to 0:00 on Monday).

(config)# schedule-power-control time-range 3 datestart-time 090429 0000 end-time 090430 0000 action enable(config)# schedule-power-control time-range 4 datestart-time 090503 0000 end-time 090507 0000 action enable(config)# schedule-power-control time-range 5 datestart-time 090720 0000 end-time 090721 0000 action enable(config)# schedule-power-control time-range 6 datestart-time 090921 0000 end-time 090924 0000 action enable(config)# schedule-power-control time-range 7 datestart-time 091012 0000 end-time 091013 0000 action enable(config)# schedule-power-control time-range 8 datestart-time 091103 0000 end-time 091104 0000 action enable

Configures power saving functionality to operate on the
public holiday 4/29/2009.
Configures power saving functionality to operate frompublic holiday 5/3/2009 until the substitute holiday 5/6.
Configures power saving functionality to operate on the
public holiday 7/20/2009.
Configures power saving functionality to operate on the
public holiday from 9/21/2009 to 9/23/2009.
Configures power saving functionality to operate on the
public holiday 10/12/2009.
Configures power saving functionality to operate on the
public holiday 11/3/2009.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
B1 (AX6708S/AX6608S) configuration(config)# schedule-power-control time-range 9 datestart-time 091123 0000 end-time 091124 0000 action enable(config)# schedule-power-control time-range 10 datestart-time 091223 0000 end-time 091224 0000 action enable(config)# schedule-power-control time-range 11 datestart-time 100101 0000 end-time 100102 0000 action enable(config)# schedule-power-control time-range 12 datestart-time 100111 0000 end-time 100112 0000 action enable(config)# schedule-power-control time-range 13 datestart-time 100211 0000 end-time 100212 0000 action enable(config)# schedule-power-control time-range 14 datestart-time 100322 0000 end-time 100323 0000 action enable

Configures power saving functionality to operate on thesubstitute holiday 11/23/2009.
Configures power saving functionality to operate on the
public holiday 12/23/2009.
Configures power saving functionality to operate on the
public holiday 1/1/2010.
Configures power saving functionality to operate on the
public holiday 1/11/2010.
Configures power saving functionality to operate on the
public holiday 2/11/2010.
Configures power saving functionality to operate on thesubstitute holiday 3/22/2010.

(config)# schedule-power-control time-range 15 datestart-time 090724 0000 end-time 090914 0000 action enable

Configures power saving to operate over summer break:(Example: 7/24/2009 to 9/13/2009)(config)# schedule-power-control time-range 16 datestart-time 091223 0000 end-time 100107 0000 action enable

Configures power saving to operate over winter break:(Example: 12/23/2009 to 1/6/2010)(config)# schedule-power-control time-range 17 datestart-time 090401 0000 end-time 090403 0000 action enable(config)# schedule-power-control time-range 18 datestart-time 100211 0000 end-time 100401 0000 action enable

Configures power saving to operate over spring break:(Example: 4/1/2009 to 4/2/2009)(Example: 2/11/2010 to 3/31/2010)(config)# schedule-power-control time-range 19 datestart-time 100429 0000 end-time 100430 0000 action enable(config)# schedule-power-control time-range 20 datestart-time 100503 0000 end-time 100506 0000 action enable(config)# schedule-power-control time-range 21 datestart-time 100719 0000 end-time 100720 0000 action enable(config)# schedule-power-control time-range 22 datestart-time 100920 0000 end-time 100921 0000 action enable(config)# schedule-power-control time-range 23 datestart-time 100923 0000 end-time 100924 0000 action enable(config)# schedule-power-control time-range 24 datestart-time 101011 0000 end-time 101012 0000 action enable(config)# schedule-power-control time-range 25 datestart-time 101103 0000 end-time 101104 0000 action enable(config)# schedule-power-control time-range 26 datestart-time 101123 0000 end-time 101124 0000 action enable(config)# schedule-power-control time-range 27 datestart-time 101223 0000 end-time 101224 0000 action enable(config)# schedule-power-control time-range 28 datestart-time 110101 0000 end-time 110102 0000 action enable(config)# schedule-power-control time-range 29 datestart-time 110111 0000 end-time 110112 0000 action enable(config)# schedule-power-control time-range 30 datestart-time 110211 0000 end-time 110212 0000 action enable(config)# schedule-power-control time-range 31 datestart-time 110321 0000 end-time 110322 0000 action enable

Configures power saving functionality to operate on the
public holiday 4/29/2010.
Configures power saving functionality to operate on the
public holiday from 5/3/2010 to 5/5/2010.
Configures power saving functionality to operate on the
public holiday 7/19/2010.
Configures power saving functionality to operate on the
public holiday 9/20/2010.
Configures power saving functionality to operate on the
public holiday 9/23/2010.
Configures power saving functionality to operate on the
public holiday 10/11/2010.
Configures power saving functionality to operate on the
public holiday 11/3/2010.
Configures power saving functionality to operate on the
public holiday 11/23/2010.
Configures power saving functionality to operate on the
public holiday 12/23/2010.
Configures power saving functionality to operate on the
public holiday 1/1/2011.
Configures power saving functionality to operate on the
public holiday 1/11/2011.
Configures power saving functionality to operate on the
public holiday 2/11/2011.
Configures power saving functionality to operate on the
public holiday 3/21/2011.

(config)# schedule-power-control time-range 32 datestart-time 100801 0000 end-time 100921 0000 action enable

Configures power saving to operate over summer break:(Example: 8/1/2010 to 9/20/2010)(config)# schedule-power-control time-range 33 datestart-time 101223 0000 end-time 110111 0000 action enable

Configures power saving to operate over winter break:(Example: 12/23/2010 to 1/10/2011)(config)# schedule-power-control time-range 34 datestart-time 100401 0000 end-time 100403 0000 action enable(config)# schedule-power-control time-range 35 datestart-time 110211 0000 end-time 110401 0000 action enable

Configures power saving to operate over spring break:(Example: 4/1/2010 to 4/2/2010)(Example: 2/11/2011 to 3/31/2011)
Important points on constructing a system 3.3(7)(config)# save
(config)# end#

Saves the configuration.
Exits configuration mode.

3.5

Configuring power saving on AX1240S floor switches

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
There are seven steps to implementing the dynamic power saving functionality for this application example.

(1) [Power saving in normal time range] Use power saving functionality to reduce power consumption.
(2) Schedule power saving functionality for nights and holidays using the scheduling function.
(3) [Power saving in scheduled time range] Set the power-off function that applies for both normal and scheduled
time ranges.
(4) [Power saving in scheduled time range] Set port-related power saving functionality(5) [Power saving in scheduled time range] Configure the sleep function for the device.
(6) Specify scheduled time ranges using a simple approach.
(7) Save the configuration as the startup configuration before the device enters sleep mode.

Each step is described in detail below.

(1)[Power saving in normal time range] Use power saving functionality to reduce power consumption.

To save power, set the LED brightness setting function, unused port power saving function (link-down port
power saving operation and port deactivation) as needed.
The power saving functionality and associated commands are as follows:- LED brightness setting function: Set by the system port-led command.
- Link-down port power saving operation: Set by the power-control port cool-standby command.
Ports with this function configured will take slightly longer (3 to 5 seconds) to re-establish the link.
- Deactivating ports (port deactivation settings): Set by shutdown command.

(2)

Schedule power saving functionality for nights and holidays using the scheduling function.

You can save power by using scheduling to implement power saving functionality on the AX1240S in time
ranges when there are no users on the premises, like nights and weekends. If you intend to switch between
normal and power saving modes on a regular basis, you can use the scheduling function to automate the process.
You can also significantly reduce power consumption by putting the device to sleep on a scheduled basis.
Scheduling is configured separately from normal time ranges using the following set of commands. The
purpose of each command is described in (3) onwards.
schedule-power-control port-led: Controls port LED brightness in scheduled time ranges
schedule-power-control shutdown interface : Controls power to unused ports in scheduled time ranges
schedule-power-control system-sleep: Puts the device to sleep in scheduled time ranges
schedule-power-control time-range: Sets dates, times, and other properties that govern whenpower saving functionality operates.

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26

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(3)[Power saving in scheduled time range] Set the power-off function that applies for both normal andscheduled time ranges.

Configure the LED brightness setting function and unused port power saving function (link-down port powersaving operation and port deactivation) that you want to be retained when the device transitions from a normal
time range to a scheduled time range.
If you choose not to use the sleep function and neglect to schedule the unused port power saving function,
unused ports will draw power during scheduled time ranges.
The functions and commands are as follows:- LED brightness setting function:
Set by schedule-power-control port-led- Link-down port power saving operation: Set by schedule-power-control port cool-standby- Deactivating ports (port deactivation settings): Set by schedule-power-control shutdown
interface [{add | remove}]
Use the interface parameter of the schedule-power-control shutdown command to
specify ports. You can specify multiple ports in one operation. If the command spans multiple lines, use
the add parameter for the second and subsequent items. You can disable the function for selected portsby executing the command with the remove parameter specified.
If you combine these functions with the sleep function, the LEDs will be off and ports will be deactivatedwhen the device is asleep regardless of how these functions are configured.

(4)[Power saving in scheduled time range] Set port-related power saving functionality.

Configure power saving functionality for additional ports in scheduled time ranges.
The following shows the power saving functionality you can set for ports and the associated commands.
- LED brightness setting function: Set by schedule-power-control port-led- Link-down port power saving operation: Set by schedule-power-control port cool-standby- Deactivating ports (port deactivation settings): Set by schedule-power-control shutdown
interface [{add | remove}](5)[Power saving in scheduled time range] Configure the sleep function on the device.

Use the schedule-power-control system-sleep command to configure the sleep function fordevices that go unused during scheduled time ranges.

(6)

Specify scheduled time ranges using a simple approach.

Use schedule-power-control time-range commands to specify a maximum of 50 time ranges inwhich scheduled power saving functionality operates. You can use this command to implement power saving
functionality on specific dates, certain days of the week, or every day. Make sure that the start and end times of atime range are separated by at least 30 minutes.
To avoid complexity, we recommend that you take a simple approach to configuring schedules using only
enable for the action parameter, by specifying daily time ranges first, followed by days of the week and thenspecific dates.
The disable option of the action parameter can be used to disable a schedule for a specified duration.
If the time range you specify overlaps with an enable parameter, action disable takes precedence.

(7)

Save the startup configuration before the device enters sleep mode.

When the device goes to sleep, all communication stops and the console is disabled. Any unsaved configuration
changes are lost. The device uses the startup configuration when exiting sleep mode, so make sure that you havesaved the configuration before the device enters sleep mode.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

3.6

Example of AX1240S devices configured as floor switches

In this example, late night hours and holidays (weekends, public holidays, and extended breaks) are defined in
the same manner as Table 3.4-1. Described below is an example of a configuration that implements dynamic
power saving functionality in AX1240S devices. See Appendix 1 for an overview of the network configuration.

(1)

Devices A1 to A40 (AX1240S)

On the AX1240S floor switches, set LED switches to dimmed and configure power saving functionality forlink-down ports and for unused ports 21 to 24.
Schedule the power saving functionality on the AX1240S devices A1 to A40 as shown in Table 3.6-1.

Table 3.6-1 Example of scheduling for AX1240S devices A1 to A40
Item
LED operation
Port power
For link-down ports
savingFor unused ports
Device sleep

Status in normal time
rangesDimmedAll ports

Status in scheduled time ranges

Ports 21 to 24
Normal operation

Ports 21 to 24
Sleep modeOff
All ports

A1 to A40 (AX1240S) configuration[Configuration of power saving functionality in normal time ranges]
Set LED brightness to dimmed(config)# system port-led economy

Dims lit and blinking LEDs.

Important points on constructing a system 3.5(1)Configure power saving functionality for link-down ports
Configures link-down ports to operate in power saving
mode.
Important points on constructing a system 3.5(1)Configure power saving functionality for unused ports (port deactivation settings)(config)# interface range fastethernet 0/21-24
Stops the supply of power to unused ports 21 to 24.
(config-if-range)# shutdown
Important points on constructing a system 3.5(1)(config)# power-control port cool-standby(config)# top[Configuration of power saving functionality in scheduled time ranges]
Configure power saving functionality for link-down ports (to be carried over from normal time ranges)
Configures link-down ports to operate in power saving
mode.
Important points on constructing a system 3.5(2),3.5(3)(config)# schedule-power-control port cool-standby

Configure power saving functionality for unused ports (to be carried over from normal time ranges)
Stops the supply of power to unused ports 21 to 24.

(config)# schedule-power-control shutdown interface
0/21-24

Important points on constructing a system 3.5(3)Set LED brightness to off(config)# schedule-power-control port-led disable

Turns active LEDs off.

Important points on constructing a system 3.5(4)Enable the sleep function on the device(config)# schedule-power-control system-sleep

Sets the device to sleep mode.

Important points on constructing a system 3.5(5)Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
A1 to A40 (AX1240S) configuration
Configure the scheduled time ranges(config)# schedule-power-control time-range 1 everyday
start-time 0000 end-time 0600 action enable

Configures power saving functionality to operate every day
from 0:00 to 6:00.

(config)# schedule-power-control time-range 2 weekly
start-time sat 0000 end-time mon 0000 action enable

Configures power saving functionality to run all day on
weekends (0:00 on Saturday to 0:00 on Monday).

(config)# schedule-power-control time-range 3 datestart-time 090429 0000 end-time 090430 0000 action enable(config)# schedule-power-control time-range 4 datestart-time 090503 0000 end-time 090507 0000 action enable(config)# schedule-power-control time-range 5 datestart-time 090720 0000 end-time 090721 0000 action enable(config)# schedule-power-control time-range 6 datestart-time 090921 0000 end-time 090924 0000 action enable(config)# schedule-power-control time-range 7 datestart-time 091012 0000 end-time 091013 0000 action enable(config)# schedule-power-control time-range 8 datestart-time 091103 0000 end-time 091104 0000 action enable(config)# schedule-power-control time-range 9 datestart-time 091123 0000 end-time 091124 0000 action enable(config)# schedule-power-control time-range 10 datestart-time 091223 0000 end-time 091224 0000 action enable(config)# schedule-power-control time-range 11 datestart-time 100101 0000 end-time 100102 0000 action enable(config)# schedule-power-control time-range 12 datestart-time 100111 0000 end-time 100112 0000 action enable(config)# schedule-power-control time-range 13 datestart-time 100211 0000 end-time 100212 0000 action enable(config)# schedule-power-control time-range 14 datestart-time 100322 0000 end-time 100323 0000 action enable

Configures power saving functionality to operate on the
public holiday 4/29/2009.
Configures power saving functionality to operate from public
holiday 5/3/2009 until the substitute holiday 5/6/2009.
Configures power saving functionality to operate on the
public holiday 7/20/2009.
Configures power saving functionality to operate on the
public holiday from the 9/21/2009 to 9/23/2009.
Configures power saving functionality to operate on the
public holiday 10/12/2009.
Configures power saving functionality to operate on the
public holiday 11/3/2009
Configures power saving functionality to operate on thesubstitute holiday 11/23/2009.
Configures power saving functionality to operate on the
public holiday 12/23/2009.
Configures power saving functionality to operate on the
public holiday 1/1/2010.
Configures power saving functionality to operate on the
public holiday 1/11/2010.
Configures power saving functionality to operate on the
public holiday 2/11/2010.
Configures power saving functionality to operate on thesubstitute holiday 3/22/2010.

(config)# schedule-power-control time-range 15 datestart-time 090724 0000 end-time 090914 0000 action enable

Configures power saving to operate over summer break:(Example: 7/24/2009 to 9/13/2009)(config)# schedule-power-control time-range 16 datestart-time 091223 0000 end-time 100107 0000 action enable

Configures power saving to operate over winter break:(Example: 12/23/2009 to 1/6/2010)(config)# schedule-power-control time-range 17 datestart-time 090401 0000 end-time 090403 0000 action enable(config)# schedule-power-control time-range 18 datestart-time 100211 0000 end-time 100401 0000 action enable

Configures power saving to operate over spring break:(Example: 4/1/2009 to 4/2/2009)(Example: 2/11/2010 to 3/31/2010)(config)# schedule-power-control time-range 19 datestart-time 100429 0000 end-time 100430 0000 action enable(config)# schedule-power-control time-range 20 datestart-time 100503 0000 end-time 100506 0000 action enable(config)# schedule-power-control time-range 21 datestart-time 100719 0000 end-time 100720 0000 action enable(config)# schedule-power-control time-range 22 datestart-time 100920 0000 end-time 100921 0000 action enable(config)# schedule-power-control time-range 23 datestart-time 100923 0000 end-time 100924 0000 action enable(config)# schedule-power-control time-range 24 datestart-time 101011 0000 end-time 101012 0000 action enable(config)# schedule-power-control time-range 25 datestart-time 101103 0000 end-time 101104 0000 action enable(config)# schedule-power-control time-range 26 datestart-time 101123 0000 end-time 101124 0000 action enable(config)# schedule-power-control time-range 27 datestart-time 101223 0000 end-time 101224 0000 action enable(config)# schedule-power-control time-range 28 datestart-time 110101 0000 end-time 110102 0000 action enable(config)# schedule-power-control time-range 29 datestart-time 110111 0000 end-time 110112 0000 action enable(config)# schedule-power-control time-range 30 datestart-time 110211 0000 end-time 110212 0000 action enable(config)# schedule-power-control time-range 31 date

Configures power saving functionality to operate on the
public holiday 4/29/2010.
Configures power saving functionality to operate on the
public holiday from 5/3/2010 to 5/5/2010.
Configures power saving functionality to operate on the
public holiday 7/19/2010.
Configures power saving functionality to operate on the
public holiday 9/20/2010.
Configures power saving functionality to operate on the
public holiday 9/23/2010.
Configures power saving functionality to operate on the
public holiday 10/11/2010.
Configures power saving functionality to operate on the
public holiday 11/3/2010.
Configures power saving functionality to operate on the
public holiday 11/23/2010.
Configures power saving functionality to operate on the
public holiday 12/23/2010.
Configures power saving functionality to operate on the
public holiday 1/1/2011.
Configures power saving functionality to operate on the
public holiday 1/11/2011.
Configures power saving functionality to operate on the
public holiday 2/11/2011.
Configures power saving functionality to operate on the

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
A1 to A40 (AX1240S) configuration
start-time 110321 0000 end-time 110322 0000 action enablepublic holiday 3/21/2011.

(config)# schedule-power-control time-range 32 datestart-time 100801 0000 end-time 100921 0000 action enable

Configures power saving to operate over summer break:(Example: 8/1/2010 to 9/20/2010)(config)# schedule-power-control time-range 33 datestart-time 101223 0000 end-time 110111 0000 action enable

Configures power saving to operate over winter break:(Example: 12/23/2010 to 1/10/2011)(config)# schedule-power-control time-range 34 datestart-time 100401 0000 end-time 100403 0000 action enable(config)# schedule-power-control time-range 35 datestart-time 110211 0000 end-time 110401 0000 action enable

Configures power saving to operate over spring break:(Example: 4/1/2010 to 4/2/2010)(Example: 2/11/2011 to 3/31/2011)

Important points on constructing a system 3.5(6)(config)# save
(config)# end#(2)

After configuring sleep mode for scheduled time ranges, if
you exit configuration mode without saving theconfiguration, the message shown on the left appears. To
save the configuration, enter n, execute the savecommand, and then exit configuration mode.
Important points on constructing a system 3.5(7)Devices A41 to A60 (AX1240S)

On AX1240S devices A41 to A60, configure power saving functionality for normal time ranges as describedin Table 3.6-2.
You do not need to configure scheduling as there are no scheduled time ranges for these devices.

Table 3.6-2 Example of scheduling for AX1240S devices A41 to A60
Item
LED operation
Port power saving
For link-down ports
For unused ports

Status in normal time ranges
DimmedAll ports
Ports 21 to 24

A41 to A60 (AX1240S) configuration[Configuration of power saving functionality in normal time ranges]
Set LED brightness to dimmed(config)# system port-led economy

Dims lit and blinking LEDs.

Important points on constructing a system 3.5(1)Configure power saving functionality for link-down ports(config)# power-control port cool-standby

Configures link-down ports to operate in power saving
mode.
Important points on constructing a system 3.5(1)Configure power saving functionality for unused ports (port deactivation settings)(config)# interface range fastethernet 0/21-24(config-if-range)# shutdown(config)# top(config)# save
(config)# end#

3.7

Stops the supply of power to unused ports 21 to 24.

Important points on constructing a system 3.5(1)Saves the configuration.
Exits configuration mode.

Checking settings and description of messages and log entries

The descriptions that follow assume the use of an AX6600S device as the backbone switch (log entries are for
OS Ver.11.2 on AX6600S).

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

3.7.1
(1)

Checking settings for normal time ranges on an AX6600S backbone switch

Use the show system command to check the number of active PSPs, the operating mode of standby
PSPs, and the normal power modeB1# show system
Date 2009/10/23 16:02:35 JST
System: AX6608S, OS-SE Ver. 11.2
Node : Name=B1:
Device redundancy cpu status : duplex
Power control : normal:
CSU1 : active
Normal power mode
CPU : AX-F6600-41A [CSU-1A , 80200020]
Boot : 2009/10/23 16:01:12 , operation reboot , 0 times restart
PSP : active
Lamp : STATUS LED=green , ACTIVE LED=green
SYSTEM1 LED=green , SYSTEM2 LED=light off:
Active PSP
CSU2 : standby
CPU : AX-F6600-41A [CSU-1A , 80200020]
Boot : 2009/10/23 16:01:19 , operation reboot , 0 times restart
PSP : standby hot
Lamp : STATUS LED=green , ACTIVE LED=light off
Standby PSP
SYSTEM1 LED=green , SYSTEM2 LED=light off
Hot standby:

Figure 3.7-1 Example of checking active PSPs, standby PSP operation, and normal powermode from within a normal time range(2)

Use the show port command to check the status of power saving operation for unused ports
B1# show port
Date 2009/10/23 16:03:25 JSTPort Counts:152
Port Name
Status Speed
1/ 1 tengeth1/1
up
10GBASE-SR
1/ 2 tengeth1/2
dis
1/ 3 tengeth1/3
dis
1/ 4 tengeth1/4
dis
2/ 1 tengeth2/1
up
10GBASE-SR
2/ 2 tengeth2/2
dis
2/ 3 tengeth2/3
dis
2/ 4 tengeth2/4
dis
3/ 1 geth3/1
up
1000BASE-SX::
3/20 geth3/20
up
1000BASE-SX
3/21 geth3/21
dis
3/22 geth3/22
dis
3/23 geth3/23
dis
3/24 geth3/24
dis
4/ 1 geth4/1
up
1000BASE-SX::

Duplex
FCtl FrLen ChGr/Status
full
on1518 61/up-/- appears-/- in Statusdis-/column:
fullon1518 61/up
Operation
was disabled by-/shutdown-/-command in
configuration.
-/full(auto) off 1518 1/up-

full(auto) off
full(auto) off

1518 -/-/-/-/-/1518 1/up

Figure 3.7-2 Example of checking unused port power saving operation from within a normal
time range

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(3)

Use the show power-control schedule command to check the scheduled time ranges

You can use the show power-control schedule command to check the current status of the powersaving schedule, and the dates and times when the power saving schedule applies.
B1# show power-control schedule 091023 count 10
Date 2009/10/23(Fri) 16:04:43 JSTCurrent Schedule Status : Disable
Schedule Power Control Date:
2009/10/23(Fri) 00:00 JST - 2009/10/23(Fri) 06:00 JST
2009/10/24(Sat) 00:00 JST - 2009/10/26(Mon) 06:00 JST
2009/10/27(Tue) 00:00 JST - 2009/10/27(Tue) 06:00 JST
2009/10/28(Wed) 00:00 JST - 2009/10/28(Wed) 06:00 JST
2009/10/29(Thu) 00:00 JST - 2009/10/29(Thu) 06:00 JST
2009/10/30(Fri) 00:00 JST - 2009/10/30(Fri) 06:00 JST
2009/10/31(Sat) 00:00 JST - 2009/11/02(Mon) 06:00 JST
2009/11/03(Tue) 00:00 JST - 2009/11/04(Wed) 06:00 JST
2009/11/05(Thu) 00:00 JST - 2009/11/05(Thu) 06:00 JST
2009/11/06(Fri) 00:00 JST - 2009/11/06(Fri) 06:00 JST

Current status of
power saving
schedule (normal)

Dates and times
when power saving
schedule applies

Figure 3.7-3 Example of checking scheduled time ranges from within a normal time range(showing the first 10 events from 10/23/2009)

3.7.2
(1)

Checking settings for scheduled time ranges on an AX6600S backbone switch

Use the show system command to check the number of active PSPs, the operating mode of standby
PSPs, and the power saving modeB1# show system
Date 2009/10/24 00:04:16 JST
System: AX6608S, OS-SE Ver. 11.2
Node : Name=B1
Has entered power saving:
mode without downtime
Device redundancy cpu status : duplex
Power control : saving mode2:
CSU1 : active
CPU : AX-F6600-41A [CSU-1A , 80200020]
Boot : 2009/10/23 16:01:12 , operation reboot , 0 times restart
PSP : active
Active PSP
Lamp : STATUS LED=green , ACTIVE LED=green
SYSTEM1 LED=green , SYSTEM2 LED=green:
CSU2 : standby
CPU : AX-F6600-41A [CSU-1A , 80200020]
Boot : 2009/10/23 16:01:19 , operation reboot , 0 times restart
PSP : standby hotStandby PSP
Lamp : STATUS LED=green , ACTIVE LED=light off
Hot standby
SYSTEM1 LED=green , SYSTEM2 LED=light off:

Figure 3.7-4 Example of checking active PSPs, standby PSP operation, and scheduled powermode from within a normal time range

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(2)

Use the show nif command to check shutdown status of unused NIFs
B1# show nif
Date 2009/10/24 00:04:52 JST
NIF1: active 4-port 10GBASE-R(XFP)
retry:0
Average:0Mbps/80Gbps Peak:0Mbps at 09:00:00
Port1: active up 10GBASE-SR
0012.e2a0.4503
XFP connect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port2: disable 0012.e2a0.4504
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port3: disable 0012.e2a0.4505
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port4: disable 0012.e2a0.4506
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
NIF2: active 4-port 10GBASE-R(XFP)
retry:0
Average:0Mbps/80Gbps Peak:0Mbps at 09:00:00
Port1: active up 10GBASE-SR
0012.e2a0.4533
XFP connect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port2: disable 0012.e2a0.4534
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port3: disable 0012.e2a0.4535
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
Port4: disable 0012.e2a0.4536
XFP notconnect
Bandwidth:10000000kbps Average out:0Mbps Average in:0Mbps
NIF3: disable 24-port 1000BASE-X(SFP)
retry:0
NIF3 is disabled
Average:0Mbps/48Gbps Peak:0Mbps at 09:00:00
NIF4: disable 24-port 1000BASE-X(SFP)
retry:0
NIF4 is disabled
Average:0Mbps/48Gbps Peak:0Mbps at 09:00:00
NIF5: disable 24-port 1000BASE-X(SFP)
retry:0
Average:0Mbps/48Gbps Peak:0Mbps at 09:00:00
NIF5 is disabled
NIF6: disable 24-port 1000BASE-X(SFP)
retry:0
Average:0Mbps/24Gbps Peak:0Mbps at 09:00:00
NIF6 is disabled
NIF7: active 24-port 1000BASE-X(SFP)
retry:0
Average:0Mbps/24Gbps Peak:10Mbps at 16:01:49
Port1: active up 1000BASE-SX full(auto)
0012.e2a0.c530
SFP connect
Bandwidth:1000000kbps Average out:0Mbps Average in:0Mbps
Port2: active up 1000BASE-SX full(auto)
0012.e2a0.c531
SFP connect
Bandwidth:1000000kbps Average out:0Mbps Average in:0Mbps
Port3: active up 1000BASE-SX full(auto)
0012.e2a0.c532
SFP connect
Bandwidth:1000000kbps Average out:0Mbps Average in:0Mbps:::

Figure 3.7-5 Example of checking shutdown status of unused NIFs

(3)

Messages output when switching to power saving mode

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)
The figure below shows an example of the messages output when an AX6600S device has entered the powersaving mode. See Appendix 1 for examples of complete messages and examples of the messages output by
AX6700S devices.
B1#
10/24 00:00:01 E3 SOFTWARE 25090003 1001:000000000000 System changes to the schedule power control because
it became schedule time.
B1#
10/24 00:00:01 E3 SOFTWARE 25090001 1001:000000000000 The change of power control mode was started.
B1#
10/24 00:00:01 E3 NIF NIF:3 25000100 1240:000000000000 NIF disabled administratively.
Power
B1#
to NIFs
10/24 00:00:01 E3 NIF NIF:4 25000100 1240:000000000000 NIF disabled administratively.
B1#
3 to 6
10/24 00:00:01 E3 NIF NIF:5 25000100 1240:000000000000 NIF disabled administratively.
is OFF
B1#
10/24 00:00:01 E3 NIF NIF:6 25000100 1240:000000000000 NIF disabled administratively.
B1#
10/24 00:00:01 E3 CSU 25070912 2301:000000000000 PSP on this system (CSU1) changed from active.
B1#
10/24 00:00:01 E3 CSU 25070917 2301:000000000000 PSP on other system (CSU2) changed to active.
B1#
10/24 00:00:01 E3 MAC 20120010 0800:000000000000 Port(3/1) detached from Channel Group(1) - Port down.
B1#
10/24 00:00:01 E3 MAC 20120010 0800:000000000000 Port(3/2) detached from Channel Group(2) - Port down.
B1#
:
:
:

CSU is switchedwhen power modechanges

10/24 00:00:01 E3 MAC 20120010 0800:000000000000 Port(3/19) detached from Channel Group(19) - Port down.
B1#
10/24 00:00:01 E4 VLAN 25100002 0700:006600000000 VLAN (102) Status is Down.
B1#
10/24 00:00:03 E4 VLAN 25100002 0700:008a00000000 VLAN (138) Status is Down.
B1#
10/24 00:00:03 E4 VLAN 25100002 0700:008c00000000 VLAN (140) Status is Down.
B1#
10/24 00:00:03 E3 MAC 20120010 0800:000000000000 Port(6/20) detached from Channel Group(40) - Port down.
B1#
10/24 00:00:42 R8 CSU 25070002 2301:000000000000 PSP initialized.
B1#
10/24 00:00:42 E3 CSU 25070918 2301:000000000000 PSP on other system (CSU2) changed from active.
B1#
10/24 00:00:42 E3 CSU 25070911 2301:000000000000 PSP on this system (CSU1) changed to active.
B1#
10/24 00:00:42 E3 CSU 01300412 2314:0dae00000000 System status changed from duplex to simplex.
B1#
10/24 00:01:24 E3 SOFTWARE 25090002 1001:000000000000 The change of power control mode was completed.
B1#
10/24 00:01:25 E3 CSU 01300413 2314:0dac00000000 System status changed from simplex to duplex.

Figure 3.7-6 Example of messages output when switching to power saving mode

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(4)

Log entries output when switching to power saving mode

The figure below shows an example of the log entries output when an AX6600S device has entered the powersaving mode. See Appendix 1 for complete log entries and examples of the log entries output by AX6700S
devices.
B1# show logging
Date 2009/10/24 00:02:22 JST
System information
AX6608S, OS-SE Ver. 11.2 (Build:62), CSU1(active)
Logging information
KEY 10/24 00:02:22 operator(tty00):B1# show logging
EVT 10/24 00:01:25 E3 CSU 01300413 2314:0dac00000000 System status changed from simplex to duplex.
EVT 10/24 00:01:24 E3 SOFTWARE 25090002 1001:000000000000 The change of power control mode wascompleted.
EVT 10/24 00:00:42 E3 CSU 01300412 2314:0dae00000000 System status changed from duplex to simplex.
EVT 10/24 00:00:42 E3 CSU 25070911 2301:000000000000 PSP on this system (CSU1) changed to active.
EVT 10/24 00:00:42 E3 CSU 25070918 2301:000000000000 PSP on other system (CSU2) changed from
active.
EVT 10/24 00:00:42 R8 CSU 25070002 2301:000000000000 PSP initialized.
EVT 10/24 00:00:03 E4 MAC 20120003 0800:000000000000 Channel Group(40) is Down - All port detached.
EVT 10/24 00:00:03 E3 MAC 20120010 0800:000000000000 Port(6/20) detached from Channel Group(40)- Port down.
EVT 10/24 00:00:03 E4 VLAN 25100002 0700:008c00000000 VLAN (140) Status is Down.
EVT 10/24 00:00:03 E4 MAC 20120003 0800:000000000000 Channel Group(39) is Down - All port detached.
EVT 10/24 00:00:03 E3 MAC 20120010 0800:000000000000 Port(6/19) detached from Channel Group(39)- Port down..
:::
EVT 10/24 00:00:01 E3 MAC 20120010 0800:000000000000 Port(3/2) detached from Channel Group(2)- Port down.
EVT 10/24 00:00:01 E3 MAC 20120010 0800:000000000000 Port(3/1) detached from Channel Group(1)- Port down.
EVT 10/24 00:00:01 E3 CSU 25070917 2301:000000000000 PSP on other system (CSU2) changed to active.
EVT 10/24 00:00:01 E3 CSU 25070912 2301:000000000000 PSP on this system (CSU1) changed from
active.
EVT 10/24 00:00:01 E3 NIF NIF:6 25000100 1240:000000000000 NIF disabled administratively.
EVT 10/24 00:00:01 E3 NIF NIF:5 25000100 1240:000000000000 NIF disabled administratively.
EVT 10/24 00:00:01 E3 NIF NIF:4 25000100 1240:000000000000 NIF disabled administratively.
EVT 10/24 00:00:01 E3 NIF NIF:3 25000100 1240:000000000000 NIF disabled administratively.
EVT 10/24 00:00:01 E3 SOFTWARE 25090001 1001:000000000000 The change of power control mode wasstarted.
EVT 10/24 00:00:01 E3 SOFTWARE 25090003 1001:000000000000 System changes to the schedule power
control because it became schedule time.

Figure 3.7-7 Example of log entries output when switching to power saving mode

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

3.7.3
(1)

Checking the configuration of AX1240S floor switches in normal time ranges

Checking LED operation status

You can check the status of LEDs by the value of Brightness mode in the output of the show system
operation command.
A1# show system
Date 2009/05/14 19:01:15 JST
System: AX1240S-24T2C Ver. 2.1 (Build:60)
Name
: A1
Contact: Locate: Machine ID : 0012.e294.05b2
Boot Date: 2009/05/14 19:00:21
Elapsed time : 0 days 00:00:54
LED
ST1 LED : Green
Brightness mode : economy::

economy:LED is dimmed (operating with
reduced power)

Figure 3.7-8 Example of checking LED status(2)

Checking port power saving control status

Use the show power-control port operation command to check the status of port power saving control.
A1# show power-control port
Date 2009/05/14 20:31:59 JSTPort status cool-standby
0/1 up0/2 up::0/19 up
0/20 up
0/21 down
applied0/22 down
applied0/23 down
applied0/24 down
applied0/25 up
0/26 up-

Applied:Port power saving function is running

Figure 3.7-9 Example of checking port power saving control status

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(3)

Checking schedule status

You can use the show power-control schedule command to check the current status of the powersaving schedule, and the dates and times when the power saving schedule applies.
A1# show power-control schedule

Current status of powersaving schedule (normal)
Date 2009/05/14(Thu) 20:39:43 JSTCurrent Schedule Status : Disable
Schedule Power Control Date :2009/05/15(Fri) 00:00 JST - 2009/05/15(Fri) 06:00 JST
2009/05/16(Sat) 00:00 JST - 2009/05/18(Mon) 06:00 JST
2009/05/19(Tue) 00:00 JST - 2009/05/19(Tue) 06:00 JST
2009/05/20(Wed) 00:00 JST - 2009/05/20(Wed) 06:00 JST
2009/05/21(Thu) 00:00 JST - 2009/05/21(Thu) 06:00 JST
Scheduled dates
2009/05/22(Fri) 00:00 JST - 2009/05/22(Fri) 06:00 JST
2009/05/23(Sat) 00:00 JST - 2009/05/25(Mon) 06:00 JST
and times when
2009/05/26(Tue) 00:00 JST - 2009/05/26(Tue) 06:00 JST
power saving
2009/05/27(Wed) 00:00 JST - 2009/05/27(Wed) 06:00 JST
schedule applies
2009/05/28(Thu) 00:00 JST - 2009/05/28(Thu) 06:00 JST
Figure 3.7-10 Example of checking schedule operating status(4)

Messages output when switching to sleep mode

The following figure shows an example of the messages output when an AX1240S device goes to sleep.
A1#>>> This machine is going to sleep ... in a few seconds.

INFO 09/05/21 00:00:00 ECO System changes to the schedule power control because it became schedule time.
INFO 09/05/21 00:00:00 LED Changed LED brightness : off

Figure 3.7-11 Example of messages output when switching to sleep mode

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(5)

Log entries output when switching to sleep mode according to schedule

The AX1240S does not output log entries when entering sleep mode.
The following figure shows an example of the log entries the AX1240S outputs when waking from sleepmode.
A1# show logging
Date 2009/05/21 06:00:56 JST
System Information
AX1240S-24T2C, OS-LT2, Ver. 2.1 (Build:60)
Logging Information
Total Entry : 18
KEY INFO 09/05/21 06:00:56 console:show logging
KEY INFO 09/05/21 06:00:53 console:enable
EVT INFO 09/05/21 06:00:50 SESSION Login operator from console.
EVT INFO 09/05/21 06:00:48 VLAN VLAN (101) Status is Up.
EVT INFO 09/05/21 06:00:48 PORT FastEthernet 0/1 Link Up/Speed 100M-Full(auto)
EVT INFO 09/05/21 06:00:46 PORT Active Medium Change Notification. (0/26, SFP)EVT INFO 09/05/21 06:00:46 LINKAGG Port 0/26 attached to Channel Group 1.
EVT INFO 09/05/21 06:00:46 PORT Active Medium Change Notification. (0/25, SFP)EVT INFO 09/05/21 06:00:46 LINKAGG Port 0/25 attached to Channel Group 1.
EVT INFO 09/05/21 06:00:46 PORT 0/24 is disabled.
EVT INFO 09/05/21 06:00:46 PORT 0/23 is disabled.
EVT INFO 09/05/21 06:00:46 PORT 0/22 is disabled.
EVT INFO 09/05/21 06:00:46 PORT 0/21 is disabled.
EVT INFO 09/05/21 06:00:45 LED Changed LED brightness : economy
EVT INFO 09/05/21 06:00:42 SFP Detect to mount Transceiver module[1000BASE-SX] on the port(0/26).
EVT INFO 09/05/21 06:00:41 SFP Detect to mount Transceiver module[1000BASE-SX] on the port(0/25).
EVT INFO 09/05/21 06:00:28 KERNEL Boot cause is expired sleep time.
EVT INFO 09/05/21 06:00:28 SVP SVP started.

The device restarts when
the sleep time expires

Figure 3.7-12 Example of log entries output when waking from sleep mode

3.8

Canceling schedules

3.8.1

Disabling power saving schedules at specific times (AX6700S/AX6600S, AX1240S)

You can disable scheduled power saving by specifying the start and end times of a time range to disable. You
can disable the specified time range on a specific date or day of the week, or every day.
Example: schedule-power-control time-range 1 everyday start-time 0000 end-time 0600 action enable
schedule-power-control time-range 5 date start-time 090720 0000 end-time 090721 0000 action enable
Supposing that the above schedule is configured, you can disable the schedule from 6:00 to 24:00 on 7/20/2009
by using the commands below.
There are two ways to disable power saving: deleting a schedule entry from the configuration, and using theaction disable command to specify a disabled time range.
Method 1: Delete information associated with the fifth schedule entry(config)# no schedule-power-control time-range 5

Deletes entry number 5 from the schedule configuration
while leaving number 1.

Method 2: Set a disabled time range(config)# schedule-power-control time-range 49 datestart-time 090720 0600 end-time 090721 0000 action
disableDisables power saving in the scheduled time range from6:00 to 24:00 on 7/20/2009.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

3.8.2

Returning quickly to normal mode from power saving mode (AX6700S/AX6600S andAX1240S without sleep mode)Use the method for disabling power saving schedules at specific times, as described in 3.8.1 above.
We recommend that you use the second method which is based on the action disable command. Specify
the start and end times of the time range in which to disable power saving (you can specify the current time orearlier as the start time).
To avoid overwriting an existing schedule, you assign the new entry an unused entry number. However, it is
not always easy to identify unused entry numbers in an emergency. You can avoid this problem by leaving a
specific number unused (for example the final number 50) for this purpose.
Returning to normal mode quickly(config)# schedule-power-control time-range 50 datestart-time 090516 0600 end-time 090517 0000 action
disableTo quickly exit power saving mode at 7:00 on 5/16/2009:
Disables the scheduled time range from 6:00 to 24:00 on
5/16/2009.

Alternatively, you can use the first method to delete the entry associated with the scheduled time range.
Because this approach involves deleting one or more specific entries from the configuration, and considering themaintenance required afterwards, we do not recommend it for urgent mode changes.

3.8.3

Quickly waking a device from scheduled sleep mode (AX1240S)

You can forcibly wake a device from sleep mode by pressing the reset switch on the front panel for 3 or moreseconds until all the LEDs are lit. Scheduling will not be active on the device when it wakes.
You can reinstate scheduling on the device by executing the set power-control schedule enable
operation command after it wakes.
Simply turning the device off and on again will not wake it from sleep mode. The device will go to sleep again
because it is still in a scheduled time range.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

4. Power Saving Achieved in Application Example
For the application example described in chapter 3, ALAXALA calculated the power savings achieved by theAX switch and the system in general based on power consumption measured at the device level.
In the first edition of this guide, the results in this section were for a device in which NK1G-24T interfaces
replaced NK1G-24S NIFs 5 to 8. In this second edition, the results reflect a device in which NIFs 5 to 8 are also
NK1G-24S interfaces (though there is little difference in terms of actual results).

4.1

Power savings at device level

Measurements were conducted on the devices listed below.
•

Devices used for measurement(Device B1) Backbone switch
AX6708S or AX6608S
1 unitUsing SFP-SX as SFP
Using XFP-SR as XFP

AX6708S
ChassisPower supply
BCU1 - 2
BSU1 - 3
NIF1 - 2
NIF3 - 8
AX6608S
ChassisPower supply
CSU1 - 2
NIF1 - 2
NIF3 - 8

configuration

BCU
BSU
10GbE NIF
1GbE SFP NIF
configuration

CSU
10GbE NIF
1GbE SFP NIF

Product code
AX6708S
PS-A11
BSU-LA
NK10G-4RX
NK1G-24S

Qty.
1
8
2
3
2
6

Product code
AX6608S
PS-A11
CSU-1A
NK10G-4RX
NK1G-24S

Qty.
1
4
2
2
6

(Device A1) Floor switch AX1240S-24T2C, scheduled time ranges configured, 1 unit, SFP-SX used as SFP(Device A41) Floor switch AX1240S-24T2C, always in normal time range, 1 unit
(Device S1) Server switch AX2430S-24T2X, 1 unit, XFP-SR used as XFP, UTP used on 1-GbE ports 1 to 4
y Load conditions: A load device which sends and receives 256-byte packets is connected to the ports of eachdeviceCopyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

On the basis of actual measurements, Table 4.1-1 shows the reduction in power consumption achieved per
device in scheduled time ranges with dynamic power saving functionality implemented in the application
example of chapter 3. Percentage values indicate the reduction in power consumption relative to normal mode.

Table 4.1-1 Power savings achieved per device with dynamic power saving
256-byte packet load
Overview of measurement conditions used for application example

AX6708S as
backboneswitch(device B1)<Normal time ranges>
2 x active switch unit BSUs
1 x standby switch unit BSU
Power saving configuration:- 6 unused 10-GbE ports- 8 unused 1-GbE ports<Scheduled time ranges>
2 x active switch unit BSUs
1 x standby switch unit BSU
Power saving configuration:- Power saving mode
- 4 NIFs Shutdown- 6 unused 10-GbE ports- 8 unused 1-GbE ports- Port LEDs off

AX6608S as
backboneswitch(device B1)

AX1240S-24T2Cas classroom
floor switch(device A1)

0.0%- BSU mode:
Hot standby
(hot)

31%

- BSU mode:
Cold standby(cold2)42%<Normal time ranges>
1 x active switch unit PSP
1 x standby switch unit PSP
Power saving configuration:- 6 unused 10-GbE ports- 8 unused 1-GbE ports<Scheduled time ranges>
1 x active switch unit PSP
1 x standby switch unit PSP
Power saving configuration:- Power saving mode
- 4 NIFs Shutdown- 6 unused 10-GbE ports- 8 unused 1-GbE ports- Port LEDs off

Reduction in power
consumption per device

0.0%- PSP mode:
Hot standby
(hot)

36%

- PSP mode:
Cold standby(cold2)

43%<Normal time ranges>
Power saving configuration:- LEDs dimmed- Link-down port power saving enabled- 4 unused ports

3%<Scheduled time ranges>
Power saving configuration:- Device in sleep mode

67%

The data on this page was obtained through testing under specific conditions in ALAXALA Networks' labs. Results
obtained under different conditions and in other environments may vary.

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

4.2

System-level power savings over a year

Over the course of a year (the 8,760 hours from 4/1/2009 until 3/31/2010), the application example in chapter 3
operates in normal mode for 2,970 hours, and in power saving mode for 5,790 hours as a result of scheduling.
Standard operation(no power saving)

Normal operation: 8,760 hours

Operation with dynamic
power saving scheduled(example of chapter 3)Power saving operation: 5,790 hours

Normal operation: 2,970 hours

The results in table 4.1-1 apply to this portion.

Table 4.2-1 and 4.2-2 show the power savings that can be achieved over a year.

Table 4.2-1 Reduction in system power consumption over one year (backbone switch AX6708S)
Power saving settings
and time operating ineach mode
Power saving set
according to application
exampleBreakdown of operationtime:
Year: 8,760 hours
Scheduling breakdown:
Normal
2,970hUsed devices

Device B1 standby
unit used in hot
standby mode

Server switch(device S1) AX2430S-24T2X
Backbone switch (device B1) AX6708S
Scheduled time ranges configured

Device B1 standby unit
used in cold standby
mode
0%

21%

Classroom floor switches(devices A1 to A40) AX1240S-24T2C
Scheduled time ranges configured

28%

45%

Office and laboratory floor switches(devices A41 to A60) AX1240S-24T2C
5,790hPower saving

Overall system

24%

28%

Table 4.2-2 Reduction in system power consumption over one year (backbone switch AX6608S)
Power saving settings
and time operating ineach mode
Power saving set
according to application
exampleBreakdown of operationtime:
Year: 8,760 hours
Scheduling breakdown:
Normal
2,970hUsed devices

Device B1 standby
unit used in hot
standby mode

Server switch(device S1) AX2430S-24T2X
Backbone switch (device B1) AX6608S
Scheduled time ranges configured

Device B1 standby unit
used in cold standby
mode
0%

24%

Classroom floor switches(devices A1 to A40) AX1240S-24T2C
Scheduled time ranges configured

28%

45%

Office and laboratory floor switches(devices A41 to A60) AX1240S-24T2C
5,790hPower saving

Overall system

27%

29%

The data on this page was obtained through testing under specific conditions in ALAXALA Networks' labs. Results
obtained under different conditions and in other environments may vary.

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

5. Cautionary Notes
5.1(1)

Notes on using AX6700S/AX6600S devices
The dynamic power saving functionality "On-line switchover to power saving mode" is only supported
for redundant configurations (consisting of two or more BSUs or CSUs).

This function switches power control by restarting BSUs or PSPs in sequence, and can only be used inredundant configurations.
In AX6700S devices, on-line switchover to power saving mode (BSU/PSP power control) can be set when
redundancy bsu-load-balancing smac, redundancy bsu-mode fixed, and redundancy
standby-bsu cold are not set on the device.

(2)

A device does not switch power modes at the scheduled switching time if only one BSU or PSP is activeon the device. A device with one active BSU or PSP will restart and switch power modes when the
power-control mode command is executed.

(3)

While dynamic power saving is performing an on-line mode switch (BSU/PSP power control), do not
execute a command that might affect the switching operation.

Do not perform the following actions while BSU/PSP power control is changing the power mode:- Change (add, change, or delete) settings associated with power saving functionality, power saving schedules,
bandwidth monitoring, or storm control.
- Execute redundancy force-switchover to force a node switch.
- Press the ACH switch.

(4)

Leave at least 30 minutes between on-line mode switches (BSU/PSP power control) by dynamic powersavingWhen switching power modes, there can be a delay of 1 to 30 minutes before all settings take effect.
(In the application example in chapter 3, the AX6608S device took about 1 minute and 30 seconds to switch to
power saving mode).

(5)

If you want to retain the unused NIF and port settings you configured for normal time ranges, you must
repeat the settings for scheduled time ranges.

If you neglect to do so, unused NIFs and ports lose their shutdown attribute and draw power in scheduled
time ranges.

(6)

Explicitly specify the power control mode of standby nodes when setting scheduled time ranges.

The default operating mode for standby BSUs and PSPs differs for normal time ranges and scheduled time
ranges. To avoid mistakes, we recommend that you specify the operating mode explicitly for each time range.
Normal time ranges
AX6700S: The default operating mode of the redundancy standby-bsu command is hot
AX6600S: The default operating mode of the redundancy standby-psp command is hot
Scheduled time ranges
AX6700S: The default operating mode of the schedule-power-control standby-bsu command is cold2
AX6600S: The default operating mode of the schedule-power-control standby-psp command is cold2

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AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)(7)

Explicitly specify the power control mode when setting scheduled time ranges.

The default power mode differs for normal time ranges and scheduled time ranges. To avoid mistakes, werecommend that you also specify the power mode explicitly for normal time ranges.
Normal time ranges
The default operating mode of the power-control mode command is normal
Scheduled time ranges
The default operating mode of the schedule-power-control mode command is mode2

5.2

(1)

Notes on using AX1240S devices

If you want to retain the unused port settings you configured for normal time ranges, you must repeat thesettings for scheduled time ranges.

If you fail to designate these ports as unused on a device that does not enter sleep mode, power might be
supplied unnecessarily to these ports because the power saving functionality will not apply during scheduled time
ranges.

(2)

Turning a device off and on again will not wake it from sleep mode. Still being in a scheduled time range,
the device will immediately re-enter sleep mode after it restarts.

Wake the device from sleep mode by pressing the reset switch on the front panel for 3 or more seconds.
See 3.8.3 Quickly waking a device from scheduled sleep mode (AX1240S).
A device that remains in sleep mode for 20 days automatically wakes and restarts on the 20th day. The device
then re-enters sleep mode.

(3)

Note the following when using the sleep function (schedule-power-control system-sleep command).

- A device will not transition to sleep mode if you are in configuration command mode when a scheduled time
range arrives. The device will go to sleep after you exit configuration command mode (that is, you transition toadmin mode).
- Any unsaved configuration entries will be lost when a device enters sleep mode. For this reason, the following
message appears when you exit configuration command mode:
Unsaved changes would be lost when the machine goes to sleep!
Do you exit "configure" without save ? (y/n):
To save the configuration, enter n and then execute the save command.
The device will not enter sleep mode if configuration is still in progress when a scheduled power saving time is reached.

- You are automatically logged out if no key is pressed for a fixed period (default: 30 minutes). If you areautomatically logged out during the editing process and the device enters sleep mode, any configuration not saved is lost.

- A device that remains in sleep mode for 20 days automatically wakes and restarts on the 20th day. The device thenre-enters sleep mode.

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

44

AX Series Dynamic Power Saving Functionality Configuration Guide (second edition)

Appendix 1: Configuration Files and Log Entries
This appendix provides configuration examples for the system introduced in this document, and examples oflog entries.
The full configuration of devices in the power saving network system described in chapter 3 is stored in text
files attached to this document. (To extract the attached files, you will need Adobe Acrobat 5.0 or later or Adobe
Reader 6.0 or later).
For details on the configuration examples and sample log entries, see the attached files with the file names
listed in the following tables.

z Configuration examples (related page: 3. Application example of power saving network system)

Backbone switch

Device name and type
B1 (AX6708S)

Associated file
3-SavingEne_B1_AX67.txt

Backbone switch

B1 (AX6608S)

3-SavingEne_B1_AX66.txt

Floor switch (with power saving
scheduled)
Floor switch (normal mode only)

A1 (AX1240S-24T2C)

3-SavingEne_A1.txt

A41 (AX1240S-24T2C)

3-SavingEne_A41.txt

Server switch

S1 (AX2430S-24T2X)

3-SavingEne_S1.txt

z Log examples (related page: 3.7.2(4) Log entries output when switching to power saving mode)

Backbone switch

Device name and type
B1 (AX6708S)

Associated fileAX6708S_LogSummary.txt

Backbone switch

B1 (AX6608S)

AX6600S_LogSummary.txt

Copyright © 2009, 2010, ALAXALA Networks Corporation. All rights reserved.

45

Edition 2 – March 31, 2010

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