Oam; Introduction - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
9

OAM

This chapter describes basic principles and configuration procedures for OAM and provide
related configuration examples, including the following sections:
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9.1 Introduction

Initially, Ethernet is designed for LAN. Operation, Administration and Maintenance (OAM) is
weak because of its small size and a NE-level administrative system. With continuous
development of Ethernet technology, the application scale of Ethernet in Telecom network
becomes wider and wider. Compared with LAN, the link length and network size of Telecom
network is bigger and bigger. The lack of effective management and maintenance mechanism
has seriously obstructed Ethernet technology applying to the Telecom network.
To confirm connectivity of Ethernet virtual connection, effectively detect, confirm, and locate
faults on network, balance network utilization, measure network performance, and provide
service according Service Level Agreement (SLA), implementing OAM on Ethernet has
becoming an inevitable developing trend.
Working mode
An interface enabled with EFM OAM is called an OAM entity. EFM OAM supports the
following two working modes:
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Introduction
EFM
CFM (IEEE 802.1ag/ITU-Y.1731)
SLA
BFD
Active mode: initialized by the OAM entity that is in active mode
Passive mode: the OAM entity in passive mode just waits for connection request of the
active OAM entity. If OAM entities of both ends of a link are in passive mode, the OAM
link cannot be established.
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