Administrator Guide

To change the refresh interval for tracking an IPv4 or IPv6 route, use the following command.
Change the reachability refresh interval for tracking of an IPv4 or IPv6 route.
CONFIGURATION mode
track reachability refresh interval
The refresh interval range is from 0 to 60 seconds. The default is 60 seconds.
The following example shows how to change the refresh interval for tracking the reachability of the next-hop:
DellEMC#configure
DellEMC(conf)#track reachability refresh 20
For example, consider that the next-hop address is changed and the track reachability is checked after the set refresh interval (20
seconds). If the reachability to the next-hop address is failed, the system displays the following log stating that the track object state is
changed from UP to DOWN.
Sep 28 11:08:57 %STKUNIT1-M:CP %OTM-6-STATE: Object 2 state transition from Up to Down.
Tracking a Metric Threshold
Use the following commands to configure object tracking on the metric threshold of an IPv4 or IPv6 route.
To remove object tracking, use the no track object-id command.
1. (Optional) Reconfigure the default resolution value used by the specified protocol to scale the metric for IPv4 or IPv6 routes.
CONFIGURATION mode
track resolution {ip route | ipv6 route} {isis resolution-value | ospf resolution-value}
The range of resolution values is:
• ISIS routes - 1 to 1000. The default is 1.
• OSPF routes - 1 to 1592. The efault is 1.
2. Configure object tracking on the metric of an IPv4 or IPv6 route.
CONFIGURATION mode
track object-id {ip route ip-address/prefix-len | ipv6 route ipv6-address/prefix-len} metric
threshold [vrf vrf-name]
Valid object IDs are from 1 to 500.
Enter an IPv4 address in dotted decimal format. Valid IPv4 prefix lengths are from /0 to /32.
Enter an IPv6 address in X:X:X:X::X format. Valid IPv6 prefix lengths are from /0 to /128.
(Optional) E-Series only: For an IPv4 route, you can enter a VRF name.
3. (Optional) Configure the time delay used before communicating a change in the UP and/or DOWN status of a tracked route.
OBJECT TRACKING mode
delay {[up seconds] [down seconds]}
Valid delay times are from 0 to 180 seconds.
The default is 0.
4. (Optional) Identify the tracked object with a text description.
OBJECT TRACKING mode
description text
The text string can be up to 80 characters.
5. (Optional) Configure the metric threshold for the UP and/or DOWN routing status to be tracked for the specified route.
OBJECT TRACKING mode
threshold metric {[up number] [down number]}
The default UP threshold is 254. The routing state is UP if the scaled route metric is less than or equal to the UP threshold.
The defult DOWN threshold is 255. The routing state is DOWN if the scaled route metric is greater than or equal to the DOWN
threshold.
6. (Optional) Display the tracking configuration.
EXEC Privilege mode
show track object-id
Example of IPv4 and IPv6 Tracking Metric Thresholds
Object Tracking
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