Administrator Guide

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 create an object that tracks the UP and/or DOWN threshold of an IPv6 route
metric. In order for a route’s metric to be tracked, the route must appear as an entry in the routing table.
A tracked IPv6 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 status of the tracked route is considered to be
DOWN.
When you configure the threshold of an IPv6 route metric as a tracked object, the UP/DOWN state of
the tracked route is also determined by the current metric for the route in the routing table.
To provide a common tracking interface for different clients, route metrics are scaled in the range 0 to
255, where 0 is connected and 255 is inaccessible. The scaled metric value communicated to a client
always considers a lower value to have priority over a higher value. To determine the state of a tracked
route, the resulting scaled value is compared against the configured threshold values as follows:
● If the scaled metric for a route entry is less than or equal to the UP threshold, the state of a route is
UP.
● If the scaled metric for a route is greater than or equal to the DOWN threshold or the route is not
entered in the routing table, the state of a route is DOWN.
Configure the UP and DOWN thresholds for each tracked IPv6 route using the threshold metric
command. The default UP threshold is 254; the default DOWN threshold is 255. The notification of a
change in the state of a tracked object is sent when a metric value crosses a configured threshold.
Related
Commands
● show track ipv6 route – displays information about tracked IPv6 routes, including configuration,
current state, and clients which track the route.
● threshold metric – configures the metric threshold used to determine the UP and/or DOWN state of a
tracked route.
● track resolution ipv6 route – configures the protocol-specific resolution value used to scale an IPv6
route metric.
track ipv6 route reachability
Configure object tracking on the reachability of an IPv6 route.
Syntax
track object-id ipv6 route ip-address/prefix-len reachability
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.
ipv6-address/
prefix-len
Enter an IPv6 address in X:X:X:X::X format. The valid IPv6 prefix lengths are
from /0 to / 128.
Defaults none
Object Tracking 1153