transmission is interrupted is not shorter than the timeout period of the neighbor relationship.
Generally, it is of second level.
BFD features fast detection of faults, and is up to the millisecond level. BFD can detect statuses
of PIM neighbors in the shared network segment. When BFD detects that a peer is faulty, BFD
immediately reports it to PIM. PIM then triggers a new round of DR election without waiting
for the timeout of the neighbor relationship. This shortens the duration of interruption of data
transmission and enhances the reliability of the network.
PIM BFD is also applicable to the assert election in a shared network segment. It can fast respond
to the fault of the interface that wins the assert election.
Pre-configuration Tasks
Before configuring PIM BFD, complete the following task:
l Configuring a unicast routing protocol
l Configuring Basic PIM-SM Functions
l Enabling BFD in the system view
Data Preparation
To configure PIM BFD, you need the following data.
No.
Data
1 Minimum intervals for sending and receiving BFD detection messages, and local
detection multiple
6.12.2 Configuring PIM BFD
Enable PIM BFD on the devices that set up a PIM neighbor relationship.
Context
NOTE
This function is applicable to NBMA interfaces and broadcast interfaces rather than MTunnel interfaces.
Do as follows on PIM switchs that set up the neighbor relationship:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
The interface must be a VLANIF interface.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 6 PIM-SM (IPv4) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
186
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