Install Guide

Table Of Contents
INTERFACE mode
vrrp bfd all-neighbors
Establishing VRRP Sessions on VRRP Neighbors
The master router does not care about the state of the backup router, so it does not participate in any VRRP BFD sessions.
VRRP BFD sessions on the backup router cannot change to the UP state. Configure the master router to establish an individual
VRRP session the backup router.
To establish a session with a particular VRRP neighbor, use the following command.
Establish a session with a particular VRRP neighbor.
INTERFACE mode
vrrp bfd neighbor ip-address
To view the established sessions, use the show bfd neighbors command.
The bold line shows that VRRP BFD sessions are enabled.
To view session state information, use the show vrrp command.
The bold line shows the VRRP BFD session.
Changing VRRP Session Parameters
BFD sessions are configured with default intervals and a default role.
The parameters that you can configure are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role.
You can change parameters for all VRRP sessions or for a particular neighbor.
To change parameters for all VRRP sessions or for a particular VRRP session, use the following commands.
Change parameters for all VRRP sessions.
INTERFACE mode
vrrp bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role
[active | passive]
Change parameters for a particular VRRP session.
INTERFACE mode
vrrp bfd neighbor ip-address interval milliseconds min_rx milliseconds multiplier value
role [active | passive]
To view session parameters, use the show bfd neighbors detail command.
Disabling BFD for VRRP
If you disable any or all VRRP sessions, the sessions are torn down.
A final Admin Down control packet is sent to all neighbors and sessions on the remote system change to the Down state.
To disable all VRRP sessions on an interface, sessions for a particular VRRP group, or for a particular VRRP session on an
interface, use the following commands.
Disable all VRRP sessions on an interface.
INTERFACE mode
no vrrp bfd all-neighbors
Disable all VRRP sessions in a VRRP group.
VRRP mode
bfd disable
Disable a particular VRRP session on an interface.
INTERFACE mode
no vrrp bfd neighbor ip-address
Bidirectional Forwarding Detection (BFD)
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