Service Manual

Usage Information
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.
Related
Commands
• show track – display information about tracked objects, including configuration,
current state, and clients which track the object.
• track ip route metric threshold – configure object tracking on the threshold of an
IPv4 route metric.
track resolution ip route
Configure the protocol-specific resolution value used to scale an IPv4 route metric.
Syntax
track resolution ip 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. The range is 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 scaled metric.
Defaults None
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Object Tracking 1333