Cisco IE 4000, Software Configuration Manual

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Configuring Enhanced Object Tracking
Configuring Enhanced Object Tracking Features
Interface GigabitEthernet1/17 line-protocol
Line protocol is Down (hw down)
1 change, last change 00:18:28
Configuring a Tracked List
You can configure a tracked list of objects with a Boolean expression, a weight threshold, or a percentage threshold. A
tracked list contains one or more objects. An object must exist before it can be added to the tracked list.
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You configure a Boolean expression to specify calculation by using either “AND” or “OR” operators.
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When you measure the tracked list state by a weight threshold, you assign a weight number to each object in the
tracked list. The state of the tracked list is determined by whether or not the threshold was met. The state of each
object is determined by comparing the total weight of all objects against a threshold weight for each object.

When you measure the tracked list by a percentage threshold, you assign a percentage threshold to all objects in
the tracked list. The state of each object is determined by comparing the assigned percentages of each object to
the list.
Configuring a Tracked List with a Boolean Expression
Configuring a tracked list with a Boolean expression enables calculation by using either “AND” or “OR” operators. For
example, when tracking two interfaces using the “AND” operator,
up means that both interfaces are up, and down means
that either interface is down.
Beginning in privileged EXEC mode, follow these steps to configure a tracked list of objects with a Boolean expression:
Use the no track track-number global configuration command to delete the tracked list.
Command Purpose
1. configure terminal Enter global configuration mode.
2. track track-number list boolean
{ and | or }
Configure a tracked list object, and enter tracking configuration mode. The
track-number can be from 1 to 500.

boolean —Specify the state of the tracked list based on a Boolean
calculation.
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and —Specify that the list is up if all objects are up or down if one or more
objects are down.
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or —Specify that the list is up if one object is up or down if all objects are
down.
3. object object-number [ not ] Specify the object to be tracked. The range is from 1 to 500. The keyword
not negates the state of the object, which means that when the object is up,
the tracked list detects the object as down.
Note: An object must exist before you can add it to a tracked list.
4. delay { up seconds [ down seconds ] |
[ up seconds ] down seconds }
(Optional) Specify a period of time in seconds to delay communicating state
changes of a tracked object. The range is from 1 to 180 seconds.
5. end Return to privileged EXEC mode.
6. show track object-number Verify that the specified objects are being tracked.
7. copy running-config
startup-config (Optional) Save your entries in the configuration file.