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Applicable Environment
On two directly-connected devices, one device supports BFD and the other does not. To fast
detect a link fault, you can create a BFD session with the one-arm Echo function on the BFD-
capable device. After the BFD-capable device sends a BFD Echo packet to the BFD-incapable
device, the BFD-incapable device directly loops back the packet, achieving fast detection on the
link.
Pre-configuration Tasks
Before configuring the BFD session with the one-arm Echo function, complete the following
tasks:
l
Correctly connect interfaces.
l
Correctly assign an IP address to every Layer 3 interface.
Data Preparation
To configure the BFD session with the one-arm Echo function, you need the following data.
No.
Data
1
Name of a BFD session
2
Minimum interval at which BFD packets are received
5.10.2 Enable BFD Globally
BFD-associated configurations can be performed only after BFD has been enabled globally.
Context
Perform the following steps on the BFD-supported device at one end of a link.
Procedure
Step 1
Run:
system-view
The system view is displayed.
Step 2
Run:
bfd
BFD is globally enabled and the BFD view is displayed.
----End
5.10.3 Establishing a BFD Session
By establishing a BFD session on a BFD-capable device, you can rapidly detect a direct link
between the BFD-capable device and its BFD-incapable peer.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
5 BFD Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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