9.1 Introduction
Multiprotocol label switching transport profile (MPLS-TP) operation, administration and
maintenance (OAM)is used for MPLS-TP operation and maintenance.
9.1.1 MPLS-TP OAM Overview
MPLS-TP OAM can effectively detect, identify, and locate faults at the MPLS-TP user layer
and quickly switch traffic when links or nodes become defective or faulty. OAM ( Operation,
Administration and Maintenance ) is an effective means to reduce network maintenance
expenditure. MPLS-TP OAM is used for OAM at the MPLS-TP layer.
Background
Along with network and service transformation and integration, various new services emerge,
such as triple play services, Next Generation Network (NGN) services, carrier Ethernet services,
and Fiber-to-the-x (FTTx) services. These services require more investment and OAM costs,
and high capabilities of QoS, full service access, and the expansibility, reliability, and
manageability of transport networks. Traditional transport network technologies such as Multi-
Service Transmission Platform (MSTP), Synchronous Digital Hierarchy (SDH), and
Wavelength Division Multiplexing (WDM) cannot meet these requirements because they lack
the control plane. MPLS-TP, however, can meet these requirements because its functions can
be used on both traditional transport networks and next-generation transport networks that are
capable to process packets.
Since traditional transport networks (for example, SDH or OTN networks) set high benchmarks
for reliability and maintenance, MPLS-TP needs to provide powerful OAM capabilities. MPLS-
TP OAM provides the following functions:
l
Fault management
l
Performance monitoring
l
Protection switching
MPLS-TP OAM Functional Components
MPLS-TP OAM functions are performed on maintenance entities (MEs). An ME consists of a
pair of maintenance entity group end points (MEPs) (namely, the two ends of a link) and a group
of maintenance entity group intermediate points (MIPs) (namely, the intermediate nodes along
the link between the two ends).
The details of MPLS-TP OAM functional components are as follows:
l
ME
An ME indicates a relationship between two maintenance ends. On a bidirectional label
switched path (LSP), the two MEs can be detected by MPLS-TP OAM and do not affect
one another. One ME can be nested within another ME but cannot overlap with another
ME.
Use ME1 and ME2 shown in
as an example:
–
ME1 consists of two MEPs only.
–
ME2 consists of two MEPs and two MIPs.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
9 MPLS-TP OAM Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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