When PC2 responds to the frame from PC1, the network bridge also detects the frame from PC2
and learns that PC2 connects to Port2 because the frame is received from Port2. The mapping
between the MAC address of PC2 and Port2 is added to the network bridge table, as shown in
Figure 9-3.
Figure 9-3 Network bridge learning that PC2 connects to Port2
RouterA
Port3 Port4
Port1 Port2
00e0:fcaa:aaaa 00e0:fcaa:bbbb
Source MACDestination MAC
MAC address Port
00e0:fcaa:aaaa port1
00e0:fcaa:bbbb port2
LAN1
PC 1
PC 3
LAN2
LAN1
PC 2
PC 4
LAN2
The network bridge learns the mappings between all MAC addresses and bridge interfaces, as
shown in Figure 9-4.
Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching 9 Transparent Bridging Configuration
Issue 01 (2014-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
349
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