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5.5.1 Before You Start
Before associating the BFD session status with the sub-interface status, familiarize yourself with
the usage scenario and complete pre-configuration task of configuring a single-hop BFD session
and data preparation.
Applicable Environment
If high reliability is required and sub-interfaces are configured with a large number of services,
only a BFD session needs to be configured on an interface not on each sub-interface. The BFD
session can be associated with the sub-interface status to allow the sub-interface's protocol status
to be synchronized with the interface's protocol status. This association improves service
reliability and saves BFD session resources.
Pre-configuration Tasks
Before associating BFD status and sub-interface status, complete the following tasks:
l
Enable BFD globally.
l
Set up the one-hop BFD session, which is bound to the main interface and uses the default
multicast address for detection.
l
Set up the BFD session and ensure that the BFD session is Up.
Data Preparation
To configure the association between the BFD status and the sub-interface status, you need the
following data.
No.
Data
1
Name of the BFD session
5.5.2 Configuring the Association Between BFD Status and Sub-
Interface Status
After being associated with sub-interface status, the BFD session can affect the interface protocol
status after the BFD session status changes, which triggers fast route convergence.
Context
Perform the following procedure on the NE80E/40E that needs to rapidly detect the link fault:
Procedure
Step 1
Run:
system-view
The system view is displayed.
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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