Connectivity Guide

ipv6 ospf bfd all-neoghbors
VRF CONFIGURATION Mode
7 Enter ROUTER-OSPF mode in a non-default VRF instance.
router ospf ospf-instance vrf vrf-name
CONFIGURATION Mode
8 Establish BFD sessions with all OSPFv2 instances in a non-default VRF.
bfd all-neighbors
Changing OSPFv3 session parameters
Congure BFD sessions with default intervals and a default role.
The parameters that you can congure are: desired tx interval, required min rx interval, detection multiplier, and system role. Congure
these parameters for all OSPFv3 sessions or all OSPFv3 sessions on a particular interface. If you change a parameter globally, the change
aects all OSPFv3 neighbors sessions. If you change a parameter at the interface level, the change aects all OSPF sessions on that
interface.
NOTE: By default, OSPF uses the following BFD parameters for it's neighbors: min_tx = 200 msec, min_rx = 200 msec, multiplier
= 3, role = active. If BFD is congured under interface context, that will be given high priority.
To change parameters for all OSPFv3 sessions or for OSPF sessions on a single interface, use the following commands:
1 Change parameters for OSPF sessions.
bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active |
passive]
ROUTER-OSPFv3 Mode
2 Change parameters for all OSPF sessions on an interface.
ipv6 ospf bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role
[active | passive]
INTERFACE CONFIGURATION Mode
Disabling BFD for OSPFv3
If you disable BFD globally, all sessions are torn down and sessions on the remote system are placed in a Down state. If you disable BFD on
an interface, sessions on the interface are torn down and sessions on the remote system are placed in a Down state. Disabling BFD does
not trigger a change in BFD clients; a nal Admin Down packet is sent before the session is terminated.
To disable BFD sessions, use the following commands:
1 Disable BFD sessions with all OSPF neighbors.
no bfd all-neighbors
ROUTER-OSPFv3 Mode
2 Disable BFD sessions with all OSPF neighbors on an interface.
ipv6 ospf bfd all-neighbors disable
INTERFACE CONFIGURATION Mode
To re-enable BFD, disabled the interface alone using the following commands:
• no ipv6 ospf bfd all-neighbors command
• ipv6 ospf bfd all-neighbors
Layer 3
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