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Defaults none

Command Modes CONFIGURATION

Command History

Version Description

9.7(0.0) Introduced on the M I/O Aggregator.

Usage Information

Use this command to create an object that tracks the reachability of an IPv6 route. In order for a route’s

reachability to be tracked, the route must appear as an entry in the routing table.

A tracked route is considered to match an entry in the routing table only if the exact IPv6 address and prex length

match a table entry. For example, when congured as a tracked route, 3333:100:200:300:400::/80 does not match

routing table entry 3333:100:200:300::/64. If no route-table entry has the exact IPv6 address and prex length, the

tracked route is considered to be DOWN.

When you congure IPv6 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.

Related Commands

• show track ipv6 route – displays information about tracked IPv6 routes, including conguration, current state,

and clients which track the route.

track resolution ipv6 route

Congure the protocol-specic resolution value used to scale an IPv6 route metric.

Syntax

track resolution ipv6 route {isis resolution-value | ospf resolution-value}

To return to the default setting, use the no track object-id command.

Parameters

object-id Enter the ID number of the tracked object. Use the range to 1 to 500.

isis resolution-value Enter the resolution used to convert the metric in the routing table for ISIS routes to a

scaled metric.

ospf resolution-

value

Enter the resolution used to convert the metric in the routing table for OSPF routes to a