4000 Router Series High Availability Command Reference

track bfd

Use track bfd to create a track entry and associate it with a BFD session.

Use undo track to remove the track entry.

Syntax

track track-entry-number bfd echo interface interface-type interface-number remote ip remote-ip local ip

local-ip [ delay { negative negative-time | positive positive-time } * ]

undo track track-entry-number

Default

No track entry exists.

Views

System view

Predefined user roles

network-admin

Parameters

track-entry-number: Specifies the track entry ID in the range of 1 to 1024.

interface interface-type interface-number: Specifies the outgoing interface by its type and number of the

BFD echo packets.

remote ip remote-ip: Specifies the destination IP address of the BFD echo packets.

local ip local-ip: Specifies the source IP address of the BFD echo packets.

delay: Specifies the amount of time the Track module waits before notifying the application modules that

the track entry state has changed. If you do not specify this keyword, the Track module notifies the

application modules immediately when the track entry state changes.

negative negative-time: Specifies the amount of time the Track module waits before notifying the

application modules that the status of the track entry has changed to Negative. The negative-time

argument represents the delay time in the range of 1 to 300 seconds.

positive positive-time: Specifies the amount of time the Track module waits before notifying the

application modules that the status of the track entry has changed to Positive. The positive-time argument

represents the delay time in the range of 1 to 300 seconds.

Usage guidelines

After a track entry is created, you can only use the track bfd delay command to modify its notification

delay settings. To modify other settings, you must delete the entry and create a new one.

When you configure collaboration between Track and BFD, do not configure the virtual IP address of a

VRRP group as the local or remote address of a BFD session.

Examples

# Create track entry 1, which uses BFD to monitor the link between local IP address 192.168.40.2 and

remote IP address 192.168.40.1 by sending BFD echo packets out from the interface Ethernet 1/1.

<Sysname> system-view

[Sysname] track 1 bfd echo interface ethernet 1/1 remote ip 192.168.40.1 local ip

192.168.40.2