Configuring Single-Hop Bfd; Before You Start - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
BFD for
everything
BFD for PIM

5.2 Configuring Single-hop BFD

A single-hop BFD session rapidly detects faults on direct links over a network.

5.2.1 Before You Start

Before configuring a single-hop BFD session, familiarize yourself with the usage scenario,
complete the pre-configuration tasks, and obtain the required data.
Applicable Environment
To fast check directly connected links, configure single-hop BFD.
Pre-configuration Tasks
Before configuring single-hop BFD, complete the following tasks:
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Issue 02 (2014-09-30)
Usage Scenario
Generally, if the current Designated
Router(DR) in a shared network
segment is faulty, other PIM
neighbors triggers a new round of
DR election only after the neighbor
relationship times out. The duration
that data 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.
Connect each interface correctly.
Configure IP addresses for Layer 3 interfaces.
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5 BFD Configuration
Configuration Reference
Configuring BFD for IPv4 PIM
Configuring BFD for IPv6 PIM
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