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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 69 Configuring Enhanced Object Tracking
Configuring Enhanced Object Tracking Features
Configuring a Tracked List with a 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:
Use the
no
track
track-number
global configuration command to delete the tracked list.
The example configures track list 4 to track by weight threshold. If object 1 and object 2 are down, then
track list 4 is up because object 3 satisfies the up threshold value of up 30. But if object 3 is down, both
objects 1 and 2 must be up in order to satisfy the threshold weight.
Switch(config)#
track 4 list threshold weight
Switch(config-track)#
object 1 weight 15
Switch(config-track)#
object 2 weight 20
Switch(config-track)#
object 3 weight 30
Switch(config-track)#
threshold weight up 30 down 10
Switch(config-track)#
exit
This configuration can be useful if object 1 and object 2 represent two small bandwidth connections and
object 3 represents one large bandwidth connection. The configured
down 10
value means that once the
tracked object is up, it will not go down until the threshold value is equal to or lower than 10, which in
this example means that all connections are down.
Command
Purpose
Step 1
configure terminal
Enters global configuration mode.
Step 2
track
track-number
list
threshold weight
Configures 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
]
Specifies 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
]}
Specifies 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) Specifies 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
Returns to privileged EXEC mode.
Step 7
show track
object-number
Verifies that the specified objects are being tracked.
Step 8
copy running-config
startup-config
(Optional) Saves your entries in the configuration file.
Summary of Contents for Catalyst 4500 Series
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