Cisco Systems 3750E Bridge bridge-group forward-time, Bridge bridge-group max-age seconds, 44-10

Chapter 44 Configuring Fallback Bridging

Configuring Fallback Bridging

Changing the Forward-Delay Interval

The forward-delay interval is the amount of time spent listening for topology change information after a port has been activated for switching and before forwarding actually begins.

Beginning in privileged EXEC mode, follow these steps to change the forward-delay interval. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	bridge bridge-groupforward-time	Specify the forward-delay interval.
	seconds	• For bridge-group, specify the bridge group number. The range is 1
		to 255.
		• For seconds, enter a number from 4 to 200. The default is 20.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show running-config	Verify your entry.
Step 5
	copy running-config startup-config	(Optional) Save your entry in the configuration file.

To return to the default setting, use the no bridge bridge-groupforward-timeglobal configuration command.

This example shows how to change the forward-delay interval to 10 seconds in bridge group 10:

Switch(config)# bridge 10 forward-time 10

Changing the Maximum-Idle Interval

If a switch does not receive BPDUs from the root switch within a specified interval, it recomputes the spanning-tree topology.

Beginning in privileged EXEC mode, follow these steps to change the maximum-idle interval (maximum aging time). This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	bridge bridge-group max-ageseconds	Specify the interval that the switch waits to hear BPDUs from the root
		switch.
		• For bridge-group, specify the bridge group number. The range is 1
		to 255.
		• For seconds, enter a number from 6 to 200. The default is 30.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show running-config	Verify your entry.
Step 5
	copy running-config startup-config	(Optional) Save your entry in the configuration file.

	To return to the default setting, use the no bridge bridge-groupmax-ageglobal configuration command.
	This example shows how to change the maximum-idle interval to 30 seconds in bridge group 10:
	Switch(config)# bridge 10 max-age 30
	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
44-10	OL-9775-02