Users Guide

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 address resolution protocol (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 if the next-hop address appears before considering the route
DOWN.
Related
Commands
● 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.
track resolution ip route
Configure the protocol-specific resolution value used to scale an IPv4 route metric.
C9000 Series
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 from 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, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.8(0.0) Introduced on the S3048-ON and S4048-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 configure the protocol-specific resolution value that converts the actual metric of
an IPv4 route in the routing table to a scaled metric in the range from 0 to 255.
The UP/DOWN state of a tracked IPv4 route is determined by a user-configurable threshold (the
threshold metric command) for the route’s metric in the routing table. To provide a common
tracking interface for different clients, route metrics are scaled in the range of 0-255, where 0 is
connected and 255 is inaccessible.
The protocol-specific resolution value calculates the scaled metric by dividing a route's cost by the
resolution value set for the route protocol:
● For ISIS, you can set the resolution in the range of 1-1000, where the default is 10.
● For OSPF, you can set the resolution in the range of 1-1592, where the default is 1.
1096 Object Tracking