Establishing The Configuration Task; Enabling Bfd Globally - Huawei quidway s7700 Configuration Manual

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN

6.9.1 Establishing the Configuration Task

Before configuring dynamic BFD for PW, familiarize yourself with the applicable environment,
complete the pre-configuration tasks, and obtain the required data. This can help you complete
the configuration task correctly and quickly.
Applicable Environment
In the MPLS L2VPN where PWs are used as transmission tunnels, dynamic BFD for PW is used
to quickly detect faults of PWs. Once a PW is faulty, the master and backup PWs switchover
can be immediately performed to lessen the impact on carried services.
BFD control packets are encapsulated in PW control packets, and PWs distinguish control
packets and data packets based on the control word. Therefore, during the BFD for PW
configuration, you need to enable the control word function.
Types of the PWs can be detected by using BFD are as follows:
l
l
Pre-configuration Tasks
Before configuring dynamic BFD for PW, complete the following tasks:
l
l
Data Preparation
To configure dynamic BFD for PW, you need the following data.
No.
1
2

6.9.2 Enabling BFD Globally

Before configuring dynamic BFD for PW, you must enable BFD globally.
Context
Do as follows on the PEs at the two ends of a PW:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Issue 01 (2011-07-15)
SH PWs
MH PWs
Configuring basic MPLS functions
Configuring PWs
Data
VC ID of a PW
BFD parameters
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