Dell C9000 series, Reference Manual

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Defaults none
Command Modes OBJECT TRACKING (conf_track _object-id )
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 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.
Related
Commands
• track ip route metric threshold – configures object tracking on the threshold of an
IPv4 route metric.
• track resolution ip route – configures the protocol-specific resolution value used
to scale an IPv4 route metric.
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