bfd interval

Configures Bidirectional Forwarding Detection (BFD) session parameters on an interface.

Syntax

bfd interval transmit-time min-rx receive-time multiplier number

no bfd interval transmit-time min-rx receive-time multiplier number

Parameters

transmit-time: Specifies the interval, in milliseconds, that a device waits to send a control packet to BFD peers. Valid values range from 50 through 30000. The default is 300.
min-rx receive-time: Specifies the interval, in milliseconds, that a device waits to receive a control packet from BFD peers. Valid values range from 50 through 30000. The default is 300.
multiplier number: Specifies the number of consecutive BFD control packets that must be missed from a BFD peer before BFD determines that the connection to that peer is not operational. Valid values range from 3 through 50. The default is 3.

Modes

BGP configuration mode

Interface subtype configuration mode

Usage Guidelines

The transmit-time and min-rx receive-time parameters are the intervals desired by the local device. The actual values in use are the negotiated values.

Use the bfd interval command in BGP configuration mode for multihop sessions only. Single-hop sessions in BGP use the values that are configured at the interface level with the bfd interval command. Otherwise, the default BFD interfal is used.

The no form of the command reverts to the default parameters.

Examples

The following example sets the BFD session parameters for an Ethernet interface.

device# configure terminal
device(config)# interface ethernet 0/4
device(conf-if-eth-0/4)# bfd interval 100 min-rx 100 multiplier 10

The following example sets the BFD session parameters for a virtual Ethernet (VE) interface.

device# configure terminal
device(config)# interface ve 24
device(config-if-ve-24)# bfd interval 120 min-rx 150 multiplier 8

The following example sets the BFD session parameters globally for BGP.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# bfd interval 140 min-rx 125 multiplier 44