Cisco Systems 3750E Bridge bridge-group protocol, Vlan-bridge, Bridge-group bridge-group, 44-5

Chapter 44 Configuring Fallback Bridging

Configuring Fallback Bridging

Beginning in privileged EXEC mode, follow these steps to create a bridge group and to assign an interface to it. This procedure is required.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	bridge bridge-groupprotocol	Assign a bridge group number, and specify the VLAN-bridge
	vlan-bridge	spanning-tree protocol to run in the bridge group. The ibm and dec
		keywords are not supported.
		For bridge-group, specify the bridge group number. The range is 1
		to 255. You can create up to 32 bridge groups.
		Frames are bridged only among interfaces in the same group.
Step 3
	interface interface-id	Specify the interface on which you want to assign the bridge group, and
		enter interface configuration mode.
		The specified interface must be one of these:
		• A routed port: a physical port that you have configured as a Layer 3
		port by entering the no switchport interface configuration
		command.
		• An SVI: a VLAN interface that you created by using the interface
		vlan vlan-idglobal configuration command.
		Note You can assign an IP address to the routed port or to the SVI,
		but it is not required.
Step 4
	bridge-group bridge-group	Assign the interface to the bridge group created in Step 2.
		By default, the interface is not assigned to any bridge group. An
		interface can be assigned to only one bridge group.
Step 5
	end	Return to privileged EXEC mode.
Step 6
	show running-config	Verify your entries.
Step 7
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To remove a bridge group, use the no bridge bridge-groupglobal configuration command. The no bridge bridge-groupcommand automatically removes all SVIs and routes ports from that bridge group. To remove an interface from a bridge group and to remove the bridge group, use the no bridge-groupbridge-groupinterface configuration command.

This example shows how to create bridge group 10, to specify that the VLAN-bridge STP runs in the bridge group, to define a port as a routed port, and to assign the port to the bridge group:

Switch(config)# bridge 10 protocol vlan-bridge

Switch(config)# interface gigabitethernet3/0/1

Switch(config-if)# no switchport

Switch(config-if)# no shutdown

Switch(config-if)# bridge-group 10

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02 44-5