Reference Guide

5. View the tracking configuration and the tracked object status in EXEC mode.
show track object-id
Configure IPv4 host tracking
OS10 (conf-track-1)# track 2
OS10 (conf-track-2)# ip 1.1.1.1 reachability
OS10 (conf-track-2)# do show track 2
IP Host 1.1.1.1 reachability
Reachability is DOWN
1 changes, Last change 2017-04-26T06:45:31Z
OS10 (conf-track-2)#
Configure IPv6 host tracking
OS10 (conf-track-2)# track 3
OS10 (conf-track-3)# ipv6 20::20 reachability
OS10 (conf-track-3)# delay up 20
OS10 (conf-track-3)# do show track 3
IP Host 20::20 reachability
Reachability is DOWN
1 changes, Last change 2017-04-26T06:47:04Z
OS10 (conf-track-3)#
Set tracking delays
You can configure an optional Up and/or Down timer for each tracked object. The timer allows you to set the time delay before
a change in the state of a tracked object is communicated to clients. The time delay starts when the state changes from Up to
Down or from Down to Up.
If the state of an object changes back to its former Up or Down state before the timer expires, the timer is canceled without
notifying the client. If the timer expires and an object’s state has changed, a notification is sent to the client. For example, if the
Down timer is running and an interface goes down then comes back up, the Down timer is canceled. The client is not notified of
the event.
If you do not configure a delay, a notification is sent when a change in the state of a tracked object is detected. The time delay
in communicating a state change is specified in seconds.
Object tracking
As a client, VRRP can track up to 20 interface objects plus 12 tracked interfaces supported for each VRRP group. You can
assign a unique priority-cost value from 1 to 254 to each tracked VRRP object or group interface.
The priority cost is subtracted from the VRRP group priority if a tracked VRRP object is in a Down state. If a VRRP group router
acts as owner-master, the run-time VRRP group priority remains fixed at 255. Changes in the state of a tracked object have no
effect.
In VRRP object tracking, the sum of the priority costs for all tracked objects and interfaces cannot equal or exceed the priority
of the VRRP group.
View tracked objects
You can view the status of currently tracked Layer 2 or Layer 3 interfaces, or the IPv4 or IPv6 hosts.
View brief object tracking information
OS10# show track brief
TrackID Resource Parameter Status LastChange
---------------------------------------------------------------------------------
1 line-protocol ethernet1/1/1 DOWN
2017-02-03T08:41:25Z1
2 ipv4-reachablity 1.1.1.1 DOWN
Layer 3
437