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

Parameters

object-id

Enter the ID number of the tracked object. The range is 1 to 500.

ipv6-address/

prefix-len

Enter an IPv6 address in X:X:X:X::X format. The valid IPv6 prefix lengths are

from /0 to / 128.

Defaults none

Command Modes CONFIGURATION

Command

History

Version Description

9.8(0.0P5) Introduced on the S4048-ON.

9.8(0.0P2) Introduced on the S3048-ON.

9.7(0.0) Introduced on the S6000-ON.

8.3.12.0 Introduced on the S4810.

8.4.1.0 Introduced.

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

prefix length match a table entry. For example, when configured 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 prefix length, the tracked route is considered to be DOWN.

When you configure 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.

Commands

● show track ipv6 route – displays information about tracked IPv6 routes, including configuration,

current state, and clients which track the route.

● track ipv6 route reachability – configures object tracking on the reachability of an IPv4 route.

track resolution ipv6 route

Configure the protocol-specific 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