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Configuring Enhanced Object Tracking
Configuring Enhanced Object Tracking
HSRP has a mechanism for tracking the interface line-protocol state. The enhanced object tracking
feature separates the tracking mechanism from HSRP. It creates a separate, standalone tracking process
that can be used by processes other than HSRP. This feature allows tracking of other objects in addition
to the interface line-protocol state. A client process, such as HSRP, can register an interest in tracking
objects and request notification when the tracked object changes state. Several clients can track the same
object, and can take different actions when the object changes state. This feature increases the
availability and speed of recovery of a router system and decreases outages and outage duration.
For more information about enhanced object tracking and the commands used to configure it, see this
URL:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00801541be.
html
This section includes this information:
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Understanding Enhanced Object Tracking
Each tracked object has a unique number that is specified on the tracking command-line interface (CLI).
Client processes use this number to track a specific object. The tracking process periodically polls the
tracked object for value changes and sends any changes (as up or down values) to interested client
processes, either immediately or after a specified delay.
You can also track a combination of objects in a list by using either a weight threshold or a percentage
threshold to measure the state of the list. You can combine objects using Boolean logic. A tracked list
with a Boolean "AND" function requires that each object in the list be in an up state for the tracked object
to be up. A tracked list with a Boolean "OR" function needs only one object in the list to be in the up
state for the tracked object to be up.
Configuring Enhanced Object Tracking Features
These sections describe configuring enhanced object tracking:
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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
38-12
Understanding Enhanced Object Tracking, page 38-12
Configuring Enhanced Object Tracking Features, page 38-12
Monitoring Enhanced Object Tracking, page 38-18
Tracking Interface Line-Protocol or IP Routing State, page 38-13
Configuring a Tracked List, page 38-13
Configuring HSRP Object Tracking, page 38-17
Configuring Other Tracking Characteristics, page 38-18
Chapter 38
Configuring HSRP and Enhanced Object Tracking
OL-8915-03
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