Technical whitepaper

HP Wireless Wakeup
January 2019
Version 1.3

Table of contents
1 HP Wireless Wakeup ������������������������������������������������������������������������������������������������������������������������������������������������������������ 3
1.1 Purpose......................................................................................................................................................................3
1.2 HP Wireless Wakeup overview...............................................................................................................................3
1.3 HP notebook support and BIOS configuration.....................................................................................................4
1.4 Wireless network adapter support and OS configuration .................................................................................4
1.5 Network support and configuration......................................................................................................................5
1.6 Feature limitations...................................................................................................................................................6

Technical white paper | HP Wireless Wakeup

Approved by

Affected section anddescription of change

Version No.

Version date

Revised by

1.0

08/11/2017

Danny Meng

1.108/19/2017

Danny Meng

Incorporated feedbacks

1.211/01/2017

Danny Meng

Included marketing name

1.3

11/01/2018

Danny Meng

Updated 2018 platforms
and Intel integrated WiFi
limitations on DC* Action types: Approve, Review, Inform, File, Action Required, Attend Meeting, Other (please specify).

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Technical white paper | HP Wireless Wakeup

1 HP Wireless Wakeup
1.1 Purpose
The purpose of this whitepaper is to describe the HP Wireless Wakeup feature and how to configure it on supported HP
notebook systems.

1.2 HP Wireless Wakeup overview
HP Wireless Wakeup, also commonly known as Wake on Wireless LAN (WoWLAN), is a technology that can be used
to remotely wake up computers connected to a wireless network in order to facilitate IT administration and systemmanagement. This HP Wireless Wakeup technology is based on the same concept as the Wake on LAN that is used
in a wired network. An encoded broadcast packet, known as a “wakeup magic packet,” is sent from a remote systemmanagement application in order to wake up the client computer from a system power-saving state such as standby (S3)or hibernation (S4). The industry-standard wakeup magic packet is a broadcast frame that contains 6 bytes, each set to255 (FFh), and sixteen repetitions of the target computer’s MAC address. It is sent typically as a UDP packet to port 7 or 9.
As the enterprise shifts to an all wireless network environment and the industry is trending to eliminate the traditional
Ethernet adapter from thin form factor notebook client devices, the key benefit of HP Wireless Wakeup is enabling themanagement of enterprise clients the same way as in a wired network environment.
In order to support wake in a wireless environment, there are several dependencies.
• Client devices must be able to wake from a power-saving mode by a wireless network adapter.
• Client devices must be designed to maintain power to the wireless network adapter during system power-saving statesin order to allow the wireless adapter to keep its association with a wireless access point.
• The wireless network adapter must support wake function and be able maintain a wireless association with a WLAN
access point during supported system power-saving states.
• The OS must allow the configuration of the wireless network adapter to enable WoWLAN function.
• The client device must be associated with a wireless access point prior to entering a system power-saving state, and theassociation must persist during the system power-saving state so that the adapter can listen for a wakeup packet. If theclient device loses its association with the wireless access point for any reason (for example, if the client device is moved
out of the access point’s range) while in a system power-saving state, then the wake function will no longer be available.
• Network infrastructure must be configured to allow wireless broadcast packets to traverse the network so that thewake magic packet reaches the client devices.
Typically, after a client system is awakened, a separate management solution is used to perform administrative actions
such as system update or patch, inventory, policy update, etc. The configuration and operation of these IT administrationand management application suites are beyond the scope of this whitepaper.

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1.3 HP notebook support and BIOS configuration
In order for the wireless network adapter to control the power state of the system, the wireless adapter must beintegrated with the system board power connector design of a notebook system. Therefore, external wireless adapterscannot be supported. HP notebook systems designed to support HP Wireless Wakeup will include a configuration option
in F10 BIOS Setup under the Advanced Built-In Device Options menu:

MainSecurity

Advanced

UEFI Drivers

Lock Wireless Button

Wireless Network Device (WLAN)
Bluetooth
HP LAN-Wireless Protection
LAN / WLAN Auto Switching
Wake on WLAN
Wake on LAN in Battery Mode
Fan Always on while on AC Power
Boost Converter
Backlit keyboard timeout

15 secs.

Force enable HP Sure View
Integrated Camera
Fingerprint Device
NFC
Disable battery on next shut down

Do not disable?

The HP Wireless Wakeup feature is disabled by default. To enable it, select the Wake on WLAN check box and save thesetting. Then exit BIOS Setup.

1.4 Wireless network adapter support and OS configuration
After the notebook BIOS is configured for HP Wireless Wakeup, the wireless network adapter must be configured toenable the wake function. A wireless network adapter that supports wake will expose the feature configuration andpower management options to the Windows OS. From the wireless adapter properties dialog in Windows Device Manager,
set the feature configuration to Enabled and select Allow the device to wake the computer on the Power Managementtab.

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Microsoft introduced a new system power mode, Modern Standby, with Windows® 10. A system that supports Modern
Standby Connected/Disconnected does not expose the power management option of the network adapter to the end
user, so it cannot be configured to support wake using magic packets.

1.5 Network support and configuration
When a notebook client is in a power-saving state, the OS IP network stack is no longer active, so it may not be able
respond to any Address Resolution Protocols (ARPs) from a router. Hence, a wakeup magic packet must be transmitted asa local subnet broadcast packet addressed with a client’s wireless adapter MAC address. The network administrator must
configure network devices and firewalls so that the wakeup magic packet is not blocked.
A system in a broadcast domain (subnet) can be assigned as a wake server to generate the broadcast wakeup packet.
Generally, there is no issue if the targeted client computer to be awakened is in the same subnet as the server. If thewake server does not reside in the same broadcast domain, then the network must be configured to enable and forward
directed broadcasts to allow wakeup magic packets to traverse broadcast domains.
Modern enterprise WLAN networks often block broadcast traffic to prevent denial-of-service attacks. Directed broadcast
capability is typically disabled by default. The configurations of various network environments and equipment are
beyond the scope of this whitepaper. It is advisable to contact the wireless network infrastructure provider to assist in
the configuration for a specific network design to enable WoWLAN and to limit the direct broadcast traffic to only specificsources, such as the wake server’s IP address.
An example of network configuration:
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91672-catl3-wol-vlans.html

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1.6 Feature limitations
HP 2016 KBL commercial notebooks

HP 2017-2018 commercial notebooks

Supported HP Notebooks

All commercial notebooks* except 400 series

All commercial notebooks*

Supported CPUIntel® CPU only

Both Intel® and AMD CPU

Supported wireless network adapters

Only Intel® wireless network adaptersIntel® and Realtek wireless network adapters

Supported Wake from System power-saving
modeStandby (S3)Standby (S3)Hibernate (S4)Hibernate (S4)AC and DC

AC and DC**

Supported system power source* The following notebook platforms cannot support HP Wireless Wakeup when configured as Modern Standby systems:• HP Pro x2 612 G2• HP Elite x2 1012 G2• HP EliteBook x360 1020 G2• HP Elite x2 1013 G3 Tablet• HP EliteBook x360 1030 G3• HP EliteBook x360 1040 G5** The following notebook platforms equipped with Intel® Wireless-AC 9560 integrated WiFi module cannot fully support HP Wireless Wakeup whenrunning on battery power:• HP EliteBook 1050 G1• HP ProBook 650 G4• HP ZBook 15 G5• HP ZBook 17 G5• HP ZBook Studio G5• HP ZBook Studio x360 G5.

With an Intel® wireless network adapter, when WoWLAN is enabled, if a notebook client leaves the AP coverage while in a
power-saving mode, the client system may be awakened. If this is not the desired behavior, a registry key setting can beconfigured to override the wake when connection with AP is lost:\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\000?

(folder of Wi-Fi adapter)• Registry key: WoWLanWakeUpConfig• Disable ‘Wake when connection with AP is lost’ – 0x7C

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Share with colleagues© Copyright 2018, 2019 HP Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP
products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed asconstituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
AMD is a trademark of Advanced Micro Devices, Inc. Intel is a trademark of Intel Corporation in the U.S. and other countries. Windows is either a registeredtrademark or trademark of Microsoft Corporation in the United States and/or other countries.
L56238-001, January 2019