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Command Reference Guide Global Configuration Mode Command Set

bridge <group#> aging-time <seconds>

Use the bridge aging-time command to set the length of time a dynamic entry may remain in the bridge

table from the time the entry was created or last updated. To return to the default aging-time interval, use

the no form of this command.

Syntax Description

<group#>

Bridge group number (1 to 255) specified using the

bridge-group

command

Number of seconds the entry will live (valid range: 0 to 1000000)

Default Values

300 seconds

Command Modes

(config)# Global Configuration Mode

Command History

Release 1.1 Command was introduced

Functional Notes

When bridged networks are relatively static (with very few moving hosts), increasing the aging time value may

reduce the possibility of flooding unnecessary network traffic to all subnets. If hosts on the network frequently

change, decreasing the aging time value allows the bridge to adapt to the changing network configuration.

Usage Examples

The following example configures an aging time of 450 seconds for bridge 17:

(config)#

bridge 17 aging-time 450

Technology Review

A bridged network can provide excellent traffic management to reduce collisions and limit the amount of

bandwidth wasted with unnecessary transmissions. Configuring an appropriate aging time (allowing the bridge

forwarding table to remain updated) reduces the number of flooded broadcast messages.

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