Administrator Guide

CONFIGURATION mode
track object-id {ip route ip-address/prefix-len | ipv6 route ipv6-address/prefix-len}
reachability [vrf vrf-name]
Valid object IDs are from 1 to 500.
Enter an IPv4 address in dotted decimal format; valid IPv4 prefix lengths are from / 0 to /32.
Enter an IPv6 address in X:X:X:X::X format; valid IPv6 prefix lengths are from / 0 to /128.
(Optional) E-Series only: For an IPv4 route, you can enter a VRF name to specify the virtual routing table to which the tracked route
belongs.
2. (Optional) Configure the time delay used before communicating a change in the status of a tracked route.
OBJECT TRACKING mode
delay {[up seconds] [down seconds]}
Valid delay times are from 0 to 180 seconds.
The default is 0.
3. (Optional) Identify the tracked object with a text description.
OBJECT TRACKING mode
description text
The text string can be up to 80 characters.
4. (Optional) Display the tracking configuration and the tracked object’s status.
EXEC Privilege mode
show track object-id
The following example configures object tracking on the reachability of an IPv4 route:
DellEMC(conf)#track 104 ip route 10.0.0.0/8 reachability
DellEMC(conf-track-104)#delay up 20 down 10
DellEMC(conf-track-104)#end
DellEMC#show track 104
Track 104
IP route 10.0.0.0/8 reachability
Reachability is Down (route not in route table)
2 changes, last change 00:02:49
Tracked by:
DellEMC#configure
DellEMC(conf)#track 4 ip route 3.1.1.0/24 reachability vrf
vrf1
The following example configures object tracking on the reachability of an IPv6 route:
DellEMC(conf)#track 105 ipv6 route 1234::/64 reachability
DellEMC(conf-track-105)#delay down 5
DellEMC(conf-track-105)#description Headquarters
DellEMC(conf-track-105)#end
DellEMC#show track 105
Track 105
IPv6 route 1234::/64 reachability
Description: Headquarters
Reachability is Down (route not in route table)
2 changes, last change 00:03:03
Configuring track reachability refresh interval
If there is no entry in ARP table or if the next-hop address in the ARP cache ages out for a route tracked for its reachability, an attempt is
made to check if the next-hop address is reachable after a certain refresh interval to see if the next-hop address appear in the ARP cache
before considering it as DOWN.
You can change the refresh interval for which the next-hop address is checked. The default refresh interval is 60 seconds. The object
tracking is done after the default refresh interval everytime and whenever there is a change in reachability state, the next-hop will be
considered as DOWN. The default interval is changed using the track reachability refresh command. You can disable the track
reachability feature by setting the refresh interval to 0.
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Object Tracking