11

Operators Considerations on MPLS-TP OAM tools

MPLS WG, 78th IETF - Maastricht

draft-fang-mpls-tp-oam-considerations-00

Fang Li (CATR China)

Han Li (China Mobile)

Alessando D'Alessandro (Telecom Italia)

Ruiquan Jing (China Telecom)

Guangquan Wang (China Unicom)

2

Document objectives

This Informational Internet-Draft is aimed at Pointing out the urgent and increasing

requirements of PTN applications for the metro packet transport network (PTN)

Moving forward the progress of an essential MPLS-TP OAM toolset

Proposing to adopt the solution based on draft-bhh-mpls-tp-oam-y1731

3

Document structure

Carriers’ activities and positioningRequirement of MPLS-TP OAM function

toolsetOAM solutions investigation for PTN

4

Carriers’ activities and positioning

Several Service Providers have undertook lab tests and field trial of different PTN solutions: MPLS-TP, PBB-TE, IP/MPLS

MPLS-TP emerged as the preferred solution for large scale PTN deployments Multi-service transport platforms Broadband and mobile backhauling Ethernet Private Line services

MPLS-TP significant deployment has started this year … and hence the urgent need for availability of multi-vendor

PTN solutions with proven carrier class OAM is critical Draft-bhh based OAM is a de facto standard in China

5

Requirement of MPLS-TP OAM function toolset

In line with RFC 5860Further requested objective:

The OAM toolsets for MPLS-TP in PTN should provide the same functions, performances and transport operational behavior already available in ITU-T Y.1731 because from operators perspective it is simpler to maintain a single general OAM toolset when operating different technologies

6

OAM solutions investigation for PTN

draft-bhh

BFD/LSP Ping Extension

• Essential OAM functions (CC/CV, AIS/RDI,LB,LCK,LM,DM,CSF)

• Compliant with RFC5860, RFC5586

• Passed the lab verification test in CATR

• Under development• Operators need verification testing

for vendors’ equipments, at least 1-2 year laternew OAM tools

(1)

(2)

• Passed 2 times EANTC interworking test (CEWC2009,MPLS2010)

• At least four vendors support (ALU, Huawi, ZTE, Fiberhome)

Solutions Comments Available implementations and official tests

Operator’s preference depends on the application domains, network evolution strategy, etc. If you had an urgent need for deployment with proven OAM behavior and compatible operations across optical & packet transport technologies, what solution should you select?CMCC, CTC and CUC have already selected solution 1TI is going to test solution 1

It is recommended that the solutionelements described in

draft-bhh-mpls-tp-oam-y1731be included within the MPLS-TP toolkit for supporting

MPLS-TP OAM Functions, and that the draft be progressed as a Standards Track RFC

77

QUESTIONS ?

THANK YOU

8

OAM solutions investigation for PTN 2/2

Operator’s preference depends on the application domain, network evolution strategy, etc.

E.g. priority is maximizing synergy with transport-oriented Operational and Management practices already in place (as draft-bhh provides) respect to maximizing the same behavior for evolving IP/MPLS networks (as extension of IP/MPLS OAM tools can provide)

9

Carriers’ activities and positioning: China MobileFrom 2008Q1~2009Q3， Lab test and field trial of three researched solutions for 3G wireless backhauling: pre-MPLS-TP based PTN, PBT based PTN and IP/MPLS.From 2009 Q4~2010Q1, it has built a pre-MPLS-TP based PTN network with more than 38000 PTN equipments distributed in about in 140 metro areas, to supporting TD-SCDMA wireless backhauling and L2 VPN services for business customs.In 2010 Q2-Q3, the 2nd centralized purchasing of more than 100,000 PTN equipments based on draft-bhh OAM are on going.

Typical Metro PTN network topology in China Mobile. 5387 PTN nodes are

used for wireless backhauling, broadband (PON-OLT) backhauling,

private line services

10

Carriers’ activities and positioning: China Telecom

China Telecom has been evaluating PTN technology application for more than two years, and identified the 3G Mobile backhauling and Ethernet Private Line services as the major drivers for deploying PTN technology

It has built a PTN network with 2200 nodes in Chongqing, Sichuan

Further PTN networks are planned to be deployed

11

Carriers’ activities and positioning: China Unicom Since 2009, China Unicom has conducted a

large scale of MPLS-TP based PTN lab testing to evaluate the maturity of pre-standard PTN implementations. The key driven for PTN application in China Unicom is multi-service carrying and transportation.

In 2010, China Unicom is planning to build PTN field trail networks based on lab test

12

Carriers’ activities and positioning: Telecom Italia

Investigated PTN technology since 2008 for broadband and mobile backhauling and TDM transport over a unified platform

Tested several vendors’ PTN equipment OAM based on pre-standard MPLS-TP

implementations Already planned the deployment of a multi-

vendor PTN network Already planned testing of draft-bhh based OAM

as a potential homogeneous solution