Setup Guide

• Change parameters for all static route sessions.
CONFIGURATION mode
ipv6 route bfd [vrf vrf-name][prefix-list prefix-list-name] interval milliseconds min_rx
milliseconds multiplier value role [active | passive]
To view session parameters, use the show bfd neighbors detail command, as shown in the examples in
Congure BFD for OSPF
When using BFD with OSPF, the OSPF protocol registers with the BFD manager. BFD sessions are established with all neighboring
interfaces participating in OSPF. If a neighboring interface fails, the BFD agent on the line card noties the BFD manager, which in turn
noties the OSPF protocol that a link state change occurred.
NOTE:
If you enable BFD after OSPF with a large number (more than 100) of OSPF neighbors on a VLAN port-channel and if the VLAN has
more than one port-channel, BFD does not come up immediately. (This behavior occurs only if you enable BFD after connections with
all OSPF neighbors are fully established.)
BFD does not come up for 5 to 6 minutes in a scenario when all the following conditions are met:
• A large number of BFD neighbors are present.
• The neighbors are reachable over a VLAN through a port-channel and the VLAN has multiple port-channels as members.
• BFD is enabled after all the OSPF neighbors are in an established state.
This delay should not be seen after a reload because OSPF will throttle neighbor establishment.
Conguring BFD for OSPF is a two-step process:
1 Enable BFD globally.
2 Establish sessions with OSPF neighbors.
Related Conguration Tasks
• Changing OSPF Session Parameters
• Disabling BFD for OSPF
Changing OSPF 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 OSPF sessions or all OSPF sessions on a particular interface. If you change a
parameter globally, the change aects all OSPF neighbors sessions. If you change a parameter at the interface level, the change aects all
OSPF sessions on that interface.
To change parameters for all OSPF sessions or for OSPF sessions on a single interface, use the following commands.
• Change parameters for OSPF sessions.
ROUTER-OSPF mode
bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active |
passive]
• Change parameters for all OSPF sessions on an interface.
INTERFACE mode
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Bidirectional Forwarding Detection (BFD)