Bridging

=Base Configuration=

config# bridge 50 protocol ieee config-if# bridge-group 50 config# bridge 50 priority 0...65535 (do that at a frame-relay hub to make it the STP root)

=Bridge Virtual Interfaces=

config# bridge irb (enable integrated routing & bridging) config# interface bvi 50 (match bridge ID) config-if# ip address config# bridge 50 bridge ip config# bridge 50 route ip

=IP Helper Address=

config-if# ip helper-address 192.168.2.255 (forward to broadcast address) config-if# ip directed-broadcast (all broadcasts) config# no ip forward-protocol udp (remove all udp ports from forwarding) config# ip forward-protocol udp 137 (only forward specific udp port)

=View/Debug Commands=

show bridge show spanning-tree show interface irb