Tracking The Bfd Session Status - Huawei NetEngine80E Configuration Manual - Reliability

HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
Pre-configuration Tasks
Before configuring a fast VRRP switchover, complete the following tasks:
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Data Preparation
To configure a fast VRRP switchover, you need the following data.
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4.4.2 Tracking the BFD Session Status

By tracking the status of a BFD session, a VRRP backup group can perform a fast VRRP
switchover if the BFD session status changes.
Context
Do as follows on the router that needs to perform a fast VRRP switchover:
Perform the following steps as required on a device enabled with VRRP for IPv4 or for VRRP
for IPv6.
Issue 02 (2011-09-10)
NOTE
l For detailed information about configuring EFM OAM, see the chapter "Ethernet OAM Configuration"
in the HUAWEI NetEngine80E/40E Router Configuration Guide - Reliability.
l For detailed information about configuring a VRRP backup group to track a peer BFD session, a link
BFD session, or an EFM session, see the chapter "VPLS Convergence Configuration" in the HUAWEI
NetEngine80E/40E Router Configuration Guide - VPN.
Configuring network layer attributes for interfaces to connect the network
Configuring basic EFM OAM functions
Configuring a VRRP backup group
Configuring BFD sessions such as a normal BFD sessions, a link BFD session, or a peer
BFD session
Data
Backup group ID
NOTE
l Before configuring a fast VRRP switchover, if VRRP tracks a peer BFD session, you must configure
a peer BFD session on both the master router and the backup router in a VRRP backup group. Otherwise,
VRRP flapping occurs.
l If a VRRP backup group is bound to an mVRRP backup group, the VRRP backup group cannot perform
a fast switchover by tracking any BFD session, and the status of the VRRP backup group should be
consistent with the status of the mVRRP backup group.
l When configuring a VRRP backup group to track the status of a BFD session, note the following points:
l If the parameter session-name bfd-configure-name is specified, the VRRP backup group can track
the status of only static BFD sessions with automatically negotiated discriminators.
l If the parameter session-id is specified, the VRRP backup group can track the status of only static
BFD sessions.
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