Reference Guide

Parameters
object-id Enter the ID number of the tracked object. The range is 1 to
500.
ip-address/
prefix-len
Enter an IPv4 address in dotted decimal format. The valid
IPv4 prefix lengths are from /0 to /32.
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 IPv4 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 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 the threshold of an IPv4 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. The resulting scaled value is compared against the
configured threshold values to determine the state of a tracked route 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.
You configure the UP and DOWN thresholds for each tracked route by using the
threshold metric command. The default UP threshold is 254; the default
1378
Object Tracking