bfd min-transmit-interval

Description

Sets the minimum time interval between transmitted BFD control packets on an interface.

The no form of this command sets the minimum interval between transmitted BFD control packets to the default value of 3000 ms.

Command context

config-if

Parameters

<INTERVAL>

Specifies the minimum transmit interval in ms.

Range for 8400 switches: 500-20000 ms.

Range for 832x switches: 100-20000 ms.

Default: 3000 ms.

Authority

Administrators

Usage

• If the minimum time interval is set to between 500 ms and 1000 ms, then bdf detect-multiplier must be set to at least 3.
• If bdf detect-multiplier is set to 1, then the minimum transmit interval must be set to at least 3000 ms.
• Whenever the minimum time interval is set to a value less than 1000 ms, BFD automatically adjusts the transmission interval to 1000 ms if any of the following conditions apply:

  • The session is operating in asynchronous mode and echo is enabled.

  • The session state is in any other state than up.

  As described in RFC 5880, this behavior occurs because BFD echo provides quick detection which allows the BFD asynchronous session to lower its traffic/resource requirements.

Examples

Setting the minimum transmit interval to 5000 ms on interface 1/1/1:

switch(config)# interface 1/1/1
switch(config-if)# bfd min-transmit-interval 5000

Setting the minimum transmit interval to the default value on interface 1/1/1:

switch(config)# interface 1/1/1
switch(config-if)# no bfd min-transmit-interval