Users Guide
The following example congures object tracking on the metric threshold of an IPv6 route.
Dell(conf)#track 8 ipv6 route 2::/64 metric threshold
Dell(conf-track-8)#threshold metric up 30
Dell(conf-track-8)#threshold metric down 40
Track Route Reachability
If you congure the reachability of an IP route entry as a tracked object, the UP/DOWN state of the route is determined by the entry of the
next-hop address in the ARP cache.
A tracked route is considered to be reachable if there is an address resolution protocol (ARP) cache entry for the route's next-hop address.
If the next-hop address in the ARP cache ages out for a route tracked for its reachability, an attempt is made to regenerate the ARP cache
entry to see if the next-hop address appears before considering the route DOWN.
Tracking Route Reachability
Use the following commands to congure object tracking on the reachability of an IPv4 or IPv6 route.
To remove object tracking, use the no track object-id command.
1 Congure object tracking on the reachability of an IPv4 or IPv6 route.
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 65535.
Enter an IPv4 address in dotted decimal format; valid IPv4 prex lengths are from / 0 to /32.
Enter an IPv6 address in X:X:X:X::X format; valid IPv6 prex 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) Congure 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 conguration and the tracked object’s status.
EXEC Privilege mode
show track object-id
648
Object Tracking