Users Guide

Version Description

9.10(0.1) Introduced on the S6010-ON and S4048T-ON.

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

Use this command to configure the UP and/or DOWN threshold for the scaled metric

of a tracked IPv4 or IPv6 route.

Determine the UP/DOWN state of a tracked route by the threshold for the current value

of the route metric 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.

Configure the UP and DOWN thresholds for each tracked route with 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.

The tracking process uses a protocol-specific resolution value to convert the actual

metric in the routing table to a scaled metric in the range 0 to 255. You can configure

the resolution value used to scale route metrics for supported protocols with the

track resolution ip route and track resolution ipv6 route commands.

Commands

• 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.

Object Tracking 1347