Information About Object Tracking - Cisco ASR 9000 Series User Configuration Manual

Information About Object Tracking

Information About Object Tracking
Object tracking is a mechanism to track an object and to take an action on another object with no relationship
to the tracked objects, based on changes to the properties of the object being tracked.
Each tracked object is identified by a unique name specified on the tracking command-line interface (CLI).
Cisco IOS XR processes then use this name to track a specific object.
The tracking process periodically polls the tracked object and reports any changes to its state in terms of its
being up or down, either immediately or after a delay, as configured by the user.
Multiple objects can also be tracked by means of a list, using a flexible method for combining objects with
Boolean logic. This functionality includes:
• Boolean AND function—When a tracked list has been assigned a Boolean AND function, each object
• Boolean OR function—When the tracked list has been assigned a Boolean OR function, it means that
How to Implement Object Tracking
This section describes the various object tracking procedures.
Tracking the Line Protocol State of an Interface
Perform this task in global configuration mode to track the line protocol state of an interface.
A tracked object is considered up when a line protocol of the interface is up.
After configuring the tracked object, you may associate the interface whose state should be tracked and specify
the number of seconds to wait before the tracking object polls the interface for its state.
SUMMARY STEPS
1. configure
2. track track-name
3. type line-protocol state
4. interface type interface-path-id
5. exit
6. (Optional) delay {up seconds|down seconds}
7. Use one of the following commands:
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defined within a subset must be in an up state, so that the tracked object can also be in the up state.
at least one object defined within a subset must also be in an up state, so that the tracked object can also
be in the up state.
• end
• commit
Implementing Object Tracking