Administrator Guide
State: Up
Configured parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Neighbor parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Actual parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Role: Active
Delete session on Down: True
VRF: VRF_blue
Client Registered: OSPF
Uptime: 00:00:15
Statistics:
Number of packets received from neighbor: 78
Number of packets sent to neighbor: 78
Number of state changes: 1
Number of messages from IFA about port state change: 0
Number of messages communicated b/w Manager and Agent: 4
Disabling BFD for OSPF
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.
To disable BFD sessions, use the following commands.
• Disable BFD sessions with all OSPF neighbors.
ROUTER-OSPF mode
no bfd all-neighbors
• Disable BFD sessions with all OSPF neighbors on an interface.
INTERFACE mode
ip ospf bfd all-neighbors disable
Configure BFD for OSPFv3
BFD for OSPFv3 provides support for IPV6.
Configuring BFD for OSPFv3 is a two-step process:
1. Enable BFD globally.
2. Establish sessions with OSPFv3 neighbors.
Related Configuration Tasks
• Changing OSPFv3 Session Parameters
• Disabling BFD for OSPFv3
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]
Bidirectional Forwarding Detection (BFD)
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