Huawei NetEngine80E Configuration Manual - Reliability page 339

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
BFD for
everything
BFD for VRRP
BFD for PW
BFD for VSI PW When VPLS PW redundancy is
BFD for VSI PW
(default-ip)
Issue 02 (2014-09-30)
Usage Scenario
Bidirectional Forwarding Detection
(BFD) can rapidly detect faults in
links or IP routes. BFD for VRRP
enables a master/backup VRRP
switchover to be completed within
1 second, preventing user traffic
loss. A BFD session is established
between the master and backup
devices in a VRRP backup group
and is bound to the VRRP backup
group. BFD immediately detects
communication faults in the VRRP
backup group and instructs the
VRRP backup group to perform a
master/backup switchover,
minimizing service interruptions.
In MPLS-based L2VPNs, if PWs
are set up between PEs, BFD can be
used to detect faults of the PWs. In
this way, the speed for sensing link
faults and the speed of the fast
switchover of applications at the
upper layer are accelerated.
used on metro Ethernet networks,
configuring BFD for the primary
PW speeds up fault detection and
therefore improves PW switching
performance.
In the VPLS convergence MAN
solution, you can establish multiple
service VSI PWs and bind them to
an mVSI PW. In this manner, if a
BFD session is bound to the mVSI
PW, you can monitor the service
VSI only by monitoring the status
of the mVSI PW.
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5 BFD Configuration
Configuration Reference
Associating a VRRP IPv4
Backup Group with a BFD
Session
Associating a VRRP IPv6
Backup Group with a BFD
Session
Configuring Static BFD for PW
Configuring Dynamic BFD for PW
Configuring BFD for PW
Configuring BFD for VSI PW
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