Cisco Systems 3130 User Manual
C H A P T E R
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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
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Configuring Enhanced Object Tracking
This chapter describes how to configure enhanced object tracking on the switch. This feature provides a
more complete alternative to the Hot Standby Routing Protocol (HSRP) tracking mechanism. which
allows you to track the line-protocol state of an interface. If the line protocol state of an interface goes
down, the HSRP priority of the interface is reduced and another HSRP device with a higher priority
becomes active. The enhanced object tracking feature separates the tracking mechanism from HSRP and
creates a separate, standalone tracking process that can be used by processes other than HSRP. This
allows tracking 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.This feature increases the availability and speed of recovery of a routing system and
decreases outages and outage duration.
more complete alternative to the Hot Standby Routing Protocol (HSRP) tracking mechanism. which
allows you to track the line-protocol state of an interface. If the line protocol state of an interface goes
down, the HSRP priority of the interface is reduced and another HSRP device with a higher priority
becomes active. The enhanced object tracking feature separates the tracking mechanism from HSRP and
creates a separate, standalone tracking process that can be used by processes other than HSRP. This
allows tracking 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.This feature increases the availability and speed of recovery of a routing system and
decreases outages and outage duration.
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
For more information about enhanced object tracking and the commands used to configure it, see this
URL:
URL:
The chapter includes these sections:
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Understanding Enhanced Object Tracking
Each tracked object has a unique number that is specified in 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. Several clients can track the same object, and
can take different actions when the object changes state.
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. Several clients can track the same object, and
can take different actions when the object changes state.
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.
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.