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Configuring Transparent Bridging
Transparent and SRT Bridging Configuration Examples
BC-73
Cisco IOS Bridging and IBM Networking Configuration Guide
Configuration for the New York City Router
interface tokenring 0
ip address 150.136.1.1 255.255.255.128
bridge-group 1
!
interface ethernet 0
ip address 150.136.2.1 255.255.255.128
bridge-group 1
!
interface serial 0
ip address 150.136.3.1 255.255.255.128
bridge-group 1
!
bridge 1 protocol ieee
Configuration for the Thule, Greenland Router
interface tokenring 0
ip address 150.136.10.1 255.255.255.128
bridge-group 1
!
interface serial 0
ip address 150.136.11.1 255.255.255.128
bridge-group 1
!
bridge 1 protocol ieee
Multicast or Broadcast Packets Bridging Example
When filtering specific MAC destination addresses, allow for multicast or broadcast packets that are
required by the bridged network protocols.
Assume you are bridging IP in your network as illustrated in Figure 18.
Figure 18 Network Demonstrating Output Address List Filtering
The MAC address of Host A is 0800.0907.0207, and the MAC address of Host B is 0260.8c34.0864. The
following configuration would work as expected, because input addresses work on the source address on
the incoming interface:
access-list 700 permit 0260.8c34.0864 0000.0000.0000
access-list 700 deny 0000.0000.0000 FFFF.FFFF.FFFF
interface ethernet 0
bridge-group 1 input-address-list 700
Host A
Host B
LAN A
LAN B
S1091a
Router A
Router B