Dell 9.7(0.0) Plumbing Product User Manual


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INTERFACE mode
ip ospf bfd all-neighbors
Example of Verifying Sessions with OSPF Neighbors
To view the established sessions, use the show bfd neighbors command.
The bold line shows the OSPF BFD sessions.
R2(conf-router_ospf)#bfd all-neighbors
R2(conf-router_ospf)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 2.2.2.2 2.2.2.1 Te 2/1 Up 100 100 3 O
* 2.2.3.1 2.2.3.2 Te 2/2 Up 100 100 3 O
Changing OSPFv3 Session Parameters
Configure BFD sessions 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. Configure these parameters for all OSPFv3 sessions or all
OSPFv3 sessions on a particular interface. If you change a parameter globally, the change affects all
OSPFv3 neighbors sessions. If you change a parameter at the interface level, the change affects all
OSPFv3 sessions on that interface.
To change parameters for all OSPFv3 sessions or for OSPFv3 sessions on a single interface, use the
following commands.
To view session parameters, use the show bfd neighbors detail command, as shown in the
example in Displaying BFD for BGP Information.
Change parameters for all OSPFv3 sessions.
ROUTER-OSPFv3 mode
bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value
role [active | passive]
Change parameters for OSPFv3 sessions on a single interface.
INTERFACE mode
ipv6 ospf bfd all-neighbors interval milliseconds min_rx milliseconds
multiplier value role [active | passive]
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 final Admin
Down packet is sent before the session is terminated.
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Bidirectional Forwarding Detection (BFD)