Cisco Systems 8510 CSR, 8540 CSR appendix Bridge-group, Ieee

Chapter 4 Configuring Interfaces

Configuring 802.1Q VLAN Encapsulation

Figure 4-3 Example of Bridging Between Native and Non-Native 802.1Q VLANs

Bridge-group 1

1/0/1.1

	1/0/0	Native VLAN 1
		encap dot1q 1 native
Campus		encap dot1q 100	Campus
switch			switch
router			router

Non-native VLAN 100

3/0/1 1/0/1.2

Bridge-group 2

28089

To configure the bridging between native VLAN 1 and non-native VLAN 100 depicted in Figure 4-3,perform the following steps:

	Command	Purpose
Step 1
	Router(config)# interface fastethernet	Enters subinterface configuration mode.
	slot/subslot/interface.subinterface
Step 2
	Router(config-subif)# encap dot1q vlan-idnative	Specifies 802.1Q encapsulation for Ethernet
		frames sent from the subinterface with a header
		that maintains the specified native VLAN ID
		between network nodes.
Step 3
	Router(config-subif)# bridge-group	Assigns the subinterface a bridge group number.
	bridge-group
		Note	When you are configuring VLAN
			routing, skip this step.
Step 4
	Router(config-subif)# interface fastethernet	Enters interface configuration mode to configure
	slot/subslot/interface	the Fast Ethernet main interface.
Step 5
	Router(config-if)# bridge-groupbridge-group	Assigns the main interface to the bridge group.
Step 6
	Router(config-if)# exit	Returns to global configuration mode.
Step 7
	Router(config)# bridge bridge-groupprotocol	Specifies that the bridge group will use the IEEE
	ieee	Ethernet Spanning Tree Protocol.

	Layer 3 Switching Software Feature and Configuration Guide
78-6235-04, Cisco IOS Release 12.0(10)W5(18)		4-11