Huawei AR3200 Series - Example for Configuring Local Bridging with IP Routing

interface GigabitEthernet3/0/0
bridge 2
#
return
2.8.2 Example for Configuring Local Bridging with IP Routing
Configuring local bridging and IP routing allows LANs on different network segments to
communicate with each other.
Networking Requirements
Departments of Enterprise A need to communicate with each other and with local Enterprise B.
Departments of Enterprise A belong to the LANs on the same network segment and can be
bridged, but Enterprise B belongs to a LAN on a different network segment. As a result, link-
layer bridging cannot be used to communicate between Enterprise A and Enterprise B.
In this scenario, local bridging integrated with IP routing offers a viable solution.
As shown in Figure 2-9, 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 B.
Figure 2-9 Networking diagram of local bridging integrated with IP routing
RouterA
Eth2/0/1
User 1 User 2
1.1.1.1/24 1.1.1.2/24
Eth2/0/2
GE3/0/0
User 3
3.1.1.3/24
Enterprise BEnterprise A
Bridge-if
Configuration Roadmap
The configuration roadmap is as follows:
1. Create a bridge group on RouterA.
2. Add Eth2/0/1 and Eth2/0/2 on Router A to the created bridge group to allow the two hosts
of Enterprise A to communicate with each other.
3. Create a Bridge-if interface and enable IP routing for the bridge group on RouterA to allow
Enterprise A to communicate with Enterprise B.
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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