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Configuring IP Unicast Routing
Configuring BFD
Note: If you try to configure OSPF BFD on a Layer 2 interface, the configuration is not recognized.
EXAMPLE
This is an example of enabling BFD for OSPF on all OSPF interfaces:
Switch(config)# router ospf 109
Switch(config-router)# bfd all-interfaces
Switch(config-router)# exit
Configuring BFD for OSPF on an Interface
BEFORE YOU BEGIN
Configure BFD parameters on the interface as described in the Configuring BFD Session Parameters on an Interface,
page 886.
Configure OSPF as described in the Configuring OSPF, page 823.
DETAILED STEPS
To disable OSPF BFD on an interface, enter the no ip osfp bfd or the ip ospf bfd disable interface configuration
command on the interface.
EXAMPLE
This is an example of enabling BFD for OSPF on a single interface:
Switch(config)# router ospf 109
Switch(config-router)# exit
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ip ospf bfd
Configuring BFD for IS-IS
When you start BFD sessions for IS-IS, IS-IS must be running on all devices participating in BFD. You can enable BFD
support for IS-IS by enabling it globally on all IS-IS interfaces or by enabling it on one or more interfaces.
Configuring BFD for IS-IS Globally
BEFORE YOU BEGIN
Configure BFD parameters on the interface as described in the Configuring BFD Session Parameters on an Interface,
page 886.
Command Purpose
1. configure terminal Enter global configuration mode.
2. router ospf process- id Specify an OSPF process, and enter router configuration mode.
3. exit Return to global configuration mode.
4. interface interface-id Specify an interface, and enter interface configuration mode.
5. ip ospf bfd Enable BFD on the specified OSPF interface. Repeat Steps 3 and
4 for all OSPF interfaces on which you want to run BFD sessions.
6. end Return to privileged EXEC mode.
7. show bfd neighbors [detail] Verify the configuration.
8. copy running-config
startup-config
(Optional) Save your entries in the configuration file.
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