R3102-R3103-HP 6600/HSR6600 Routers High Availability Configuration Guide

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Associating Track with BFD
BFD supports the control packet mode and echo packet mode. You can only associate a track entry
with the echo-mode BFD session to detect a directly connected link. Before that, you must configure
the source IP address of BFD echo packets.
The BFD functions as follows when it is associated with a track entry:
 If the BFD detects that the link fails, it informs the track entry of the link failure. The Track module
then sets the track entry to Negative state.
 If the BFD detects that the link is normal, the Track module sets the track entry to Positive state.
For more information about BFD, see "Configuring BFD."
Configuration procedure
To associate Track with BFD:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Create a track entry,
associate it with the BFD
session, and specify the
delay time for the Track
module to notify the
associated application
module when the track entry
status changes.
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 } * ]
No track entry is created
by default.
NOTE:
When associating Track with BFD, do not configure the virtual IP address of a VRRP group as the local or
remote address of a BFD session.
Associating Track with interface management
The interface management module monitors the physical status or network-layer protocol status of the
interface. The interface management module functions as follows when it is associated with a track
entry:
 When the physical or network-layer protocol status of the interface changes to up, the interface
management module informs the Track module of the change and the Track module sets the
track entry to Positive.
 When the physical or network-layer protocol status of the interface changes to down, the
interface management module informs the Track module of the change and the Track module
sets the track entry to Negative.
To associate Track with interface management:
Step
Command
Remarks
1. Enter system view.
system-view
N/A