Deployment Guide

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 reachability refresh
Change the refresh interval for tracking the reachability of the next-hop. If the next-hop address in the ARP cache ages out
for a route tracked for its reachability, an attempt is made to check if the next-hop address is reachable after a certain refresh
interval before considering the route DOWN.
Syntax
track reachability refresh interval
Parameters
interval Enter the refresh interval, in seconds, for object tracking reachability. The range is
from 0 to 60 seconds. The default is 60.
Defaults Enabled
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100-ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100-ON.
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
To disable the attempt to track the reachability of next-hop after the configured refresh interval, set the
refresh interval as 0.
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.
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.
1142 Object Tracking