39-15
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 39 Configuring HSRP and Enhanced Object Tracking
Configuring Enhanced Object Tracking
Use the no track track-number global configuration command to delete the tracked list.
This example configures track list 4 with a Boolean AND expression that contains two objects with one
object state negated. If the list is up, the list detects that object 2 is down:
Switch(config)# track 4 list boolean and
Switch(config-track)# object 1
Switch(config-track)# object 2 not
Switch(config-track)# exit
Weight Threshold
To track by weight threshold, configure a tracked list of objects, specify that weight is used as the
threshold, and configure a weight for each of its objects. The state of each object is determined by
comparing the total weight of all objects that are up against a threshold weight for each object.
You cannot use the Boolean “NOT” operator in a weight threshold list.
Beginning in privileged EXEC mode, follow these steps to configure a tracked list of objects by using a
weight threshold and to configure a weight for each object:
Step 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.
Step 5
end Return to privileged EXEC mode.
Step 6
show track object-number Verify that the specified objects are being tracked.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
track track-number list threshold
weight
Configure a tracked list object and enter tracking configuration mode. The
track-number can be from 1 to 500.
• threshold—Specify the state of the tracked list based on a threshold.
• weight—Specify that the threshold is based on weight.
Step 3
object object-number [weight
weight-number]
Specify the object to be tracked. The range is from 1 to 500. The optional
weight weight-number specifies a threshold weight for the object. The range
is from 1 to 255.
Note An object must exist before you can add it to a tracked list.
Step 4
threshold weight {up number |
[down number]}
Specify the threshold weight.
• up number—The valid range is from 1 to 255.
• down number—(Optional) The range depends on the number selected
for the up number. If you configure the up number as 25, the range
shown for the down number is 0 to 24.
Step 5
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.
Step 6
end Return to privileged EXEC mode.
Step 7
show track object-number Verify that the specified objects are being tracked.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
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