Command Reference Guide

Object Tracking | 1043
Defaults
None
Command Modes
CONFIGURATION
Command
History
Related
Commands
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.
track resolution ipv6 route
c e s
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, enter no track object-id.
Parameters
Defaults
None
Command Modes
CONFIGURATION
Command
History
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.1.0 Introduced
show track ipv6
route
Display information about tracked IPv6 routes, including configuration, current state, and
clients which track the route.
track ip route
reachability
Configure object tracking on the reachability of an IPv4 route.
object-id
Enter the ID number of the tracked object. Range: 1 to 65535.
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 scaled metric.
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.1.0 Introduced