2.8.4 Example for Configuring Remote Bridging with IP Routing
Configuring remote bridging with IP routing allows LANs in different geographical locations
and on different network segments to communicate.
Networking Requirements
Departments of Enterprise A need to communicate with other and with Enterprises C (in a
different geographical location).
Departments of Enterprise A belong to the LANs on the same network segment and can be
bridged, but Enterprise C belongs to a different network segment. As a result, link-layer bridging
cannot be used to communicate between Enterprise A and Enterprise C.
In this scenario, local bridging integrated with IP routing offers a viable solution.
As shown in Figure 2-11, bridge groups are configured on RouterA and RouterB, and interfaces
are added to different bridge groups. After Bridge-if interfaces are created and assigned IP
addresses, and the IP routing function is enabled, the two hosts of Enterprise A can communicate
with the hosts of Enterprises C.
Figure 2-11 Networking diagram of remote bridging integrated with IP routing
RouterA
GE3/0/0
Bridge-if
Eth2/0/1
RouterB
GE3/0/0
User 4User 1 User 2
1.1.1.1/24 1.1.1.2/24 2.1.1.4/24
Network
Eth2/0/2
Eth2/0/0
Enterprise A Enterprise C
Configuration Roadmap
The configuration roadmap is as follows:
1. Configure bridge groups on RouterA and RouterB.
2. Add Eth 2/0/1 and Eth 2/0/2 on Router A to a bridge group so that the two hosts of Enterprise
A can communicate with each other.
3. Add GE 3/0/0 to another bridge group on Router A, and add GE 3/0/0 to the bridge group
on Router B.
4. Create Bridge-if interfaces and enable the IP routing function for the bridge groups on
Router A and Router B. This allows Enterprise A and Enterprise C to communicate with
each other.
Huawei AR3200 Series Enterprise Routers
Configuration Guide - LAN 2 Transparent Bridging Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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