Perform this task in the global configuration mode to create a tracked
list of objects (which, in this case, are lists of interfaces or prefixes)
using a Boolean expression to determine the state of the list.
A tracked list contains one or more objects. The Boolean expression
enables two types of calculations 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.
An object must exist
before it can be added to a tracked list.
The NOT operator is
specified for one or more objects and negates the state of the object.
After configuring the tracked object, you must associate the interface
whose state should be tracked and you may optionally specify the number of
seconds to wait before the tracking object polls the interface for its state.