Reference Guide
Object Tracking | 1033
Command Modes
OBJECT TRACKING (conf_track_object-id)
Command
History
Related
Commands
Usage
Information
Use this command to configure the UP and/or DOWN threshold for the scaled metric of a tracked IPv4
or IPv6 route.
The UP/DOWN state of a tracked route is determined 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.
You 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.
track
c e s
Enter Object Tracking command mode to modify the configuration of a tracked object.
Syntax
track object-id
Parameters
Defaults
None
Command Modes
CONFIGURATION
Command
History
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.1.0 Introduced
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-id
Enter the ID number of the tracked object. Range: 1 to 65535.
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.1.0 Introduced