connectivity fault between Router A and Router B, the OAM management module shuts down
GE 1/0/1 and then starts it so that the other interfaces on Router A can sense the fault.
Figure 8-5
Diagram of associating Ethernet CFM with an interface (3)
Ethernet CFM
GE1/0/1
GE1/0/3
GE1/0/2
GE1/0/1
GE1/0/2
GE1/0/3
RouterA
RouterB
Link1
Link2
Link3
Aggregation group in
static LACP mode
Active link
Inactive link
MEPs in MA1
MEPs in MA2
MEPs in MA3
Configure the link aggregation group in static LACP mode on Router A and Router B. Enable
Ethernet CFM on Router A and Router B. Router A and Router B belong to the same MD.
Configure the MEP on all the member interfaces of the aggregation group. MEPs on the
interfaces of the same link are configured within the same MA. MEPs on the interfaces along
the same link belong to the same MA. MEPs on the interfaces on different links belong to
different MAs. Ethernet CFM detects the link connectivity by exchanging CCMs between MEPs
of the same link. You can then associate Ethernet CFM with the interfaces.
When a connectivity fault occurs on Link 1, the OAM management modules on Router A and
Router B shut down and then turn on their GE 1/0/1 interfaces respectively. In this manner, the
LACP module senses the connectivity fault on Link 1 and switches the service data forwarded
on Link 1 to the inactive Link 3. This implements protection switching in no more than 50 ms
to achieve carrier-class reliability.
Figure 8-6
Diagram of associating Ethernet CFM with an interface (4)
RouterA
RouterB
GE1/0/1
GE1/0/2
GE1/0/1
GE1/0/2
Eth-Trunk1
Eth-Trunk1
RouterC
RouterD
Active link
Inactive link
Aggregation group in 1:1
active/standby mode
GE2/0/1
GE2/0/1
GE2/0/2
GE2/0/2
MEPs in MA1
MEPs in MA2
MEPs in MA3
MEPs in MA4
Ether
net CF
M
Etherne
t CFM
Ether
net CF
M
Etherne
t CFM
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
8 Ethernet OAM Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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