Router Bridging

Transparent Bridging

Router interfaces are assigned to a bridge group.

bridge 1 protocol ieee
bridge 1 priority 0 !!Spanning tree root

int e0/0
	bridge-group 1
	
int s0/01
	bridge-group 1
	

show bridge
show spanning-tree

Integrated routing and bridging

Virtual interface - BVI

bridge 1 protocol ieee
bridge 1 priority 0 !!Spaaning tree root
bridge irb
bridge 1 route ip
bridge 1 bridge ipx
bridge 1 bridge ip

int e0/0
	bridge-group 1
	
int bvi 1
	ip address 172.16.5.1 255.255.255.0
	
show interfaces irb

IP Helper Addresses

Forward broadcast to another VLAN

int eth1/0
	ip helper-address 192.168.1.255
	ip directed-broadcast
	
ip forward-protocol udp 137