Users Guide

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 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 communicates to the 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.
If a tracked VRRP object is in a Down state, the priority cost is subtracted from the VRRP group priority. 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 L2 or L3 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 2017-02-03T08:41:43Z1
3 ipv6-reachablity 10::10 DOWN 2017-02-03T08:41:55Z1
View all object tracking information
OS10# show track
View interface object tracking information
OS10# show track interface
TrackID Resource Parameter Status LastChange
---------------------------------------------------------------------------------
1 line-protocol ethernet1/1/1 DOWN 2017-02-03T08:41:25Z1
OS10# show track ip
TrackID Resource Parameter Status LastChange
666
Layer 3