Configuring Pim Bfd; Establishing The Configuration Task - Huawei Quidway s3700 series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast
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7.12 Configuring PIM BFD

After detecting a fault on the peer, BFD immediately notifies the PIM module to trigger a new
DR election rather than waits until the neighbor relationship times out. This shortens the period
during which multicast data transmission is discontinued and thus improves the reliability of
multicast data transmission.

7.12.1 Establishing the Configuration Task

After basic functions of PIM-SM are configured, you can configure PIM BFD to improve PIM
network reliability, and adjust BFD parameters as required.
Networking Requirements
Generally, if the current 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.
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:
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Issue 01 (2011-10-26)
interface { interface-type interface-number | register } | outgoing-interface
{ include | exclude | match } { interface-type interface-number | register | none } |
mode { sm | ssm } | flags flag-value | fsm ]
[ number ] ]
– display pim routing-table [ group-address [ mask { group-mask-length | group-
mask } ] | source-address [ mask { source-mask-length | source-mask } ] | incoming-
interface { interface-type interface-number | register } | outgoing-interface
{ include | exclude | match } { interface-type interface-number | register | none } |
mode { sm | ssm } | flags flag-value | fsm ]
[ number ] ]
– display pim routing-table [ group-address [ mask { group-mask-length | group-
mask } ] | source-address [ mask { source-mask-length | source-mask } ] | incoming-
interface { interface-type interface-number | register } ]
Configuring a unicast routing protocol
Configuring Basic PIM-SM Functions
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Copyright © Huawei Technologies Co., Ltd.
7 PIM-SM (IPv4) Configuration
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[ outgoing-interface-number
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[ outgoing-interface-number
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