Dell 9.7(0.0) manual Enter an IPv4 address in dotted decimal format. The valid

Parameters

Defaults

Command Modes

Command History

Usage Information

Related Commands

object-id	Enter the ID number of the tracked object. The range is 1 to
	500.
ip-address/	Enter an IPv4 address in dotted decimal format. The valid
prefix-len	IPv4 prefix lengths are from /0 to /32.
vrf vrf-name	(Optional) E-Series only: You can configure a VPN routing
	and forwarding (VRF) instance to specify the virtual routing
	table to which the tracked route belongs.
none
CONFIGURATION

VersionDescription

9.7(0.0) Introduced on the S6000-ON.

8.3.12.0Introduced on the S4810.

8.4.1.0Introduced.

Use this command to create an object that tracks the reachability of an IPv4 route. In order for a route’s reachability to be tracked, the route must appear as an entry in the routing table.

A tracked IPv4 route is considered to match an entry in the routing table only if the exact IPv4 address and prefix length match a table entry. For example, when configured as a tracked route, 10.0.0.0/24 does not match the routing table entry 10.0.0.0/8. If no route-table entry has the exact IPv4 address and prefix length, the status of the tracked route is considered to be DOWN.

When you configure IPv4 route reachability as a tracked object, the UP/DOWN state of the tracked route is also 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 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 if the next- hop address appears before considering the route DOWN.

•show track – displays information about tracked objects, including configuration, current state, and clients which track the object.

•track ip route metric threshold – configures object tracking on the threshold of an IPv4 route metric.

1050 Object Tracking