Ethernet Oam Overview; Introduction To Ethernet Oam; Ethernet Oam Supported By The Ne80E/40E - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability

8.1 Ethernet OAM Overview

Ethernet OAM is classified into the link-level Ethernet OAM and network-level Ethernet OAM.

8.1.1 Introduction to Ethernet OAM

Ethernet OAM can effectively improve management and maintenance capabilities on Ethernet
networks, which ensures the stable network operation. Ethernet OAM is applicable mainly to
Ethernet networks.
Background
The Ethernet has developed as the major Local Area Network (LAN) technology because it
features easy implementation and low cost. Recently, along with the applications of Gigabit
Ethernet and the later 10-Gigabit Ethernet, Ethernet has been extended to the Metropolitan Area
Network (MAN) and Wide Area Network (WAN).
Compared with MANs and WANs, reliability and stability are not highly required for LANs.
Therefore, a mechanism for network Operations, Administration and Maintenance (OAM) is
always required for the Ethernet. The lack of the OAM mechanism prevents Ethernet from
effectively functioning as the Internet Service Provider (ISP) network. In this manner, Ethernet
OAM is becoming a trend.
Functions
Ethernet OAM has the following functions:
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Ethernet OAM improves network management and maintenance capabilities on the Ethernet
and guarantees a steady network.

8.1.2 Ethernet OAM Supported by the NE80E/40E

Ethernet OAM includes EFM OAM, Ethernet CFM, fault association, and EFM OAM extension.
Issue 02 (2011-09-10)
Fault management
– Ethernet OAM can detect the network connectivity by sending detection messages
regularly or through manual triggering.
– Ethernet OAM can locate faults on the Ethernet by using means similar to the Packet
Internet Groper (ping) and traceroute tools on IP networks.
– Ethernet OAM can work with the Automatic Protection Switching (APS) to trigger
protection switching when detecting connectivity faults. This ensures service
interruption in no more than 50 ms to achieve carrier-class reliability.
Performance management
Performance management is used to measure the packet loss ratio, delay, and jitter during
the transmission of packets. It also collects statistics on various kinds of traffic.
Performance management is implemented at the access point of users. By using the
performance management tools, the ISP can monitor the network status and locate faults
through the Network Management System (NMS). The ISP checks whether the forwarding
capacity of the network complies with the Service Level Agreement (SLA) signed with
users.
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