bfd

Enables Bidirectional Forwarding Detection (BFD).

Syntax

bfd

no bfd

Modes

IS-IS router configuration mode

OSPF router configuration mode

OSPFv3 router configuration mode

OSPF router VRF configuration mode

OSPFv3 router VRF configuration mode

Usage Guidelines

Use the bfd command in IS-IS router configuration mode to enable BFD sessions on all IS-IS interfaces on which BFD has been configured using the isis bfd command.

Use the bfd command in OSPF router configuration mode to enable BFD sessions on all OSPFv2 interfaces on which BFD has been configured using the ip ospf bfd command. Use the bfd command in OSPFv3 router configuration mode to enable BFD sessions on all OSPFv3 interfaces on which BFD has been configured using the ipv6 ospf bfd command.

The no form of the command disables BFD globally.

Examples

The following example enables BFD globally in IS-IS router configuration mode.

device# configure terminal
device(config)# router isis
device(config-isis-router)# bfd

The following example enables BFD globally in OSPF router configuration mode.

device# configure terminal
device(config)# router ospf
device(config-router-ospf-vrf-default-vrf)# bfd

The following example disables BFD globally in OSPFv3 router configuration mode.

device# configure terminal
device(config)# ipv6 router ospf
device(config-ipv6-router-ospf-vrf-default-vrf)# no bfd