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and delay can be calculated based on returned test packets to evaluate link connectivity and
performance.
Figure 8-29
Remote loopback
(Active)
GE2/0/1
Test packets
Test packets data flow
EFM OAM
CE
PE
GE1/0/1
NOTICE
Remote loopback is initiated by an interface in active EFM mode.
Remote loopback can be configured only on interfaces that do not need to forward service data.
Pre-configuration Tasks
Before configuring remote loopback, complete the following tasks:
l
Configure basic EFM functions.
l
Set the interface EFM mode to active for the interface that needs to be configured with
remote loopback.
Procedure
Step 1
Enable a device that initiates a request with the remote loopback function.
1.
Run:
system-view
The system view is displayed.
2.
Run:
interface
interface-type
interface-number
The view of an interface in active EFM mode is displayed.
3.
Run:
efm loopback
start
[
timeout
timeout
] [
transmit
]
The interface is configured to initiate remote loopback.
The default timeout period of remote loopback is 20 minutes. After the timeout period expires,
remote loopback is disabled automatically. To keep a link in the remote loopback state, set the
timeout period to 0.
When the
transmit
parameter is configured and EFM remote loopback is initialized, the initiator
keeps transparently transmitting packets without blocking them.
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.
663