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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 35 Configuring IP Unicast Routing
Configuring BFD
Note If you try to configure OSPF BFD on a Layer 2 interface, the configuration is not recognized.
This is an example of configuring 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
Beginning in privileged EXEC mode, follow these steps to configure OSFP BFD on an individual
interface:
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.
This is an example of configuring 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
Beginning in privileged EXEC mode, follow these steps to configure IS-IS BFD globally, and to
optionally disable it on specific interfaces:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
router ospf process- id Specify an OSPF process, and enter router configuration mode.
Step 3
exit Return to global configuration mode.
Step 4
interface interface-id Specify an interface, and enter interface configuration mode.
Step 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.
Step 6
end Return to privileged EXEC mode.
Step 7
show bfd neighbors [detail] Verify the configuration.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
router is-is area-tag Specify an IS-IS process and enter router configuration mode.
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