GMPLS技術を用いた
光IP統合ネットワーク
大谷 朋広、林 通秋、釣谷 剛宏、田中 英明
株式会社KDDI研究所

2004/11/2

MPLS Japan 2004

Overview of this presentation
Background
Integrating IP/optical networks

GMPLS early field trial
Interoperability between PXCs and GMPLS routers
Advantages of GMPLS networks

Service transport over GMPLS networks
MPLS/GMPLS
BGP-4/GMPLS

Conclusions

2004/11/2

MPLS Japan 2004

Background
IP-VPN
IP-VPN

IP-VPN

Ethernet-VPN
Ethernet-VPN

Ethernet-VPN

Internet
IPv4/v6

MPLS/GMPLS

SDH/SONETOpticalA network per a service andper an operational division

Optical Core Network(OXC and GMPLS)

IPv4/v6

Network integration of multi services
and multi layers is expected to improve
Operational efficiency
Resource utilization of backbone
bandwidth
Network resiliency

Service specific functions
Equipment specific skills
Merger of companies
2004/11/2

IPv4/v6

MPLS Japan 2004

GMPLS field trial


GMPLS (Generalized multi-protocol label switching)can control and manage core nodes (OXC, PXC) as well as client nodes(IP/MPLS router, MSPP) by an unified control plane.
provide flexible and reliable end-to-end services as well as achieve flat network
management over optical infrastructure.



GMPLS-controlled photonics cross-connect (PXC) and IP/MPLS routers
Evaluation from the viewpoint of operation and maintenanceAll-optical SW with bit rate and format transparency
Simple, cost effective solution with low power consumption

Evaluation of interoperability with GMPLS controlled IP/MPLS routers

Signaling level
Routing level

Separation of data and control planes in a GMPLS-controlled network
Investigation of reusing an IP-based DCN for a control plane

Objective: Evaluation of GMPLS-controlled equipment in the actual
operational environment, in order to introduce a very simple and effective
next generation lambda based optical network.

2004/11/2

MPLS Japan 2004

Field trial configuration

LMP hello

IP router

LMP hello

IP based DCN
LMP helloIP router

IP router
IP/MPLS HUB
router #2

HUB
100BaseTControl plane

HUB
100BaseT

IP/MPLSrouter #1

100BaseT

Data plane
STM-16

VideoTX
SDH
Analyzer

Osaka

STM-16

Tama

SDH
Analyzer
STM-16

2004/11/2

MPLS Japan 2004

Shinjuku

VideoRX
SDH
AnalyzerGMPLS interoperability results (1) Evaluation of GMPLS interoperability between PXCs and IP/MPLS
router on both signaling and routing levels(i) Automatic path provisioning Automatically calculate
the explicit route (Sourcerouting) Selected the shortest
path

Tama

Shinjuku

Osaka(a) A shortest path exists(ii) Explicit path provisioning Specifying an IP address(Node ID) of interfaces
 Signaling the specifiedroute2004/11/2

Tama

Shinjuku

Osaka(b) Explicit routing（selected red links）
MPLS Japan 2004

GMPLS interoperability results (2)End-to-end restoration of a Lambda LSP between routers
Disruption time measured by traffic generators
Detecting Fiber failure and fault isolation by LMP
RSVP-TE re-signaling
Restoration time : 700ms (now)TamaShinjukuOsaka

GMPLS technology not only improves the network resource utilization, butalso provides network resiliency to a client equipment.
2004/11/2

MPLS Japan 2004

Advantages of GMPLS interworking
Introduction of an integrated IP/optical network

Interworking
with IP/MPLS

Reduction of
redundant interfaces

Transparency
・ Bit rate(>40Gbit/s)・ Format(SONET/SDH/Ethernet)

OXC

RouterReduction of total
number of interfaces

・Fast protection/restoration
・Fast Provisioning

・ Integration of operation by GMPLS
・ Multi-vendor environment

2004/11/2

MPLS Japan 2004

Reduction of backup
resources by meshnetworking

Service Scenario over GMPLS
GMPLS controlled PXCs and IP/MPLS routers was evaluated in acarrier’s actual environment.
Interworking operation between PXCs and IP/MPLS routers
on both signaling & routing levels
Interworking operation for restoration (protection in the future)
Reuse of the IP-based DCN as IP Control Channels

Service scenario ?
Service migration from GMPLS point of view
MPLS interworking with GMPLS
 Major services (IP-VPN, Ethernet-VPN) are based on MPLS
 Legacy services (ATM/FR) can be transported using MPLS
IP interworking with GMPLS
 IPv4 as well as IPv6 is to be supported.
 BGP-4 is to be transported over GMPLS

2004/11/2

MPLS Japan 2004

Next target

MPLS over GMPLS (1)GMPLS c-plane
HubHub
GMPLS

GMPLS

PE

GMPLS

GMPLS
(out of band)

MPLS(in band)2004/11/2

Path
Resv

GbE
2.5G
10G

GbE
2.5G
10G

GbE

OXC

Path
Resv

GMPLS
GbE
2.5G
10G
OXC

Path
Resv
Logicalinterface
Path
Resv

MPLS Japan 2004

GbE
PE

GMPLS

Path
Resv

Path
Resv

MPLS over GMPLS (2)MPLS LSP creation over a GMPLS LSP
A (bidirectional) GMPLS LSP is created between GMPLS routers.
 LSPs can be created with GbE, 2.5G and 10G bandwidth The tunnel is logically numbered as IPv4 addresses.
A MPLS LSP is created between PE routers.
 LSPs can be created specifying logically created interfaces.

IP traffic restoration by GMPLS
IP traffic can be restored within GMPLS restoration time (700ms)
 The MPLS signaling storm can be avoided by GMPLS restoration(and protection).
 Fast protection of GMPLS is also required and to be evaluated.

2004/11/2

MPLS Japan 2004

BGP over GMPLS


BGP-4 over GMPLS
GMPLS LPS creation between GMPLS routers (w/o OSPF-TE)
BGP-4 session establishment over a GMPLS LSPDifferent ASes are connected over a GMPLS core

BGP-4 session establishment over a MPLS LSP as well (w/o OSPF)
MPLS LSP [in-band]
RSVP-TE(GMPLS LSP [out of band])BGP session
GMPLS

PE
GbE

GbE
2.5G
10G

PXC

GbE
2.5G
10G

BGP session
RSVP-TE(GMPLS LSP [out of band])2004/11/2

MPLS Japan 2004

PEGMPLSGbEFuture investigation and challengeActually operational migration
Consideration of addressing, AS number and so forth.

Control of multi layers
Dynamic interaction between (IP/)MPLS/GMPLS

High resiliency of GMPLS networks
Data plane recovery as well as control plane recovery



GMPLS multi-domain
GMPLS Inter AS/area

draft-otani-ccamp-interas-GMPLS-TE-00.txt

Interoperability
To assure multi-vendor environment

2004/11/2

MPLS Japan 2004

Conclusion
The field trial using GMPLS controlled PXCs, IP/MPLS routers and existing
DWDM systems was successfully demonstrated.
Fast provisioning/restoration of PXCs as well as IP/MPLS routers
Interworking operation between PXCs and IP/MPLS routers on
both signaling & routing levels
Reuse of the IP-based DCN as a GMPLS control plane
In addition….

Demonstration of MPLS/IPv6 transport over GMPLS networks
MPLS/GMPLS
BGP-4/GMPLS

A GMPLS controlled network will be deployed in a carrier’s actual
environment and is expected to improve carriers network operationand service management.
2004/11/2

MPLS Japan 2004