Local Bridging - Huawei AR530 series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
Figure 9-4 Last network bridge address table
PC 3
If a MAC address establishes a mapping relationship with more than one interface, the more
recent mapping relationship overrides the earlier one. This ensures each MAC address is related
with only one outbound interface.
The transparent bridge can perform dynamic MAC address learning. Learned MAC address
entries are deleted when their aging time expires.
Packet Processing
The transparent bridge processes received data frames in either of the following modes:
l
l

9.2.2 Local Bridging

Local bridging is the basic function of transparent bridging. As shown in
and LAN 2 are in the same geographic location and need to communicate with each other at the
link layer. Transparent bridging can be used to bridge these LANs locally.
Issue 01 (2014-11-30)
LAN1
PC 1
Port1
Port3
MAC address
00e0:fcaa:aaaa
00e0:fcaa:bbbb
00e0:fcaa:cccc
00e0:fcaa:dddd
LAN2
Unicast frame
If the received data frame's destination MAC address can be found in the forwarding table,
and the inbound and outbound interfaces of the frame are different, the outbound interface
forwards the data frame.
Broadcast
If the received data frame's destination MAC address is a unicast MAC address and cannot
be found in the forwarding table, or the destination MAC address of the data frame is a
multicast or broadcast MAC address, the data frame is forwarded using any interface of
one bridge group, and not the frame's inbound interface.
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RouterA
Port2
Port4
Port
port1
port2
port3
port4
9 Transparent Bridging Configuration
LAN1
PC 2
PC 4
LAN2
Figure 9-5, LAN 1
350