3Com 3C13636 Configuration Manual page 352

3Com Router 3000 Ethernet Family
Configuration Guide
00e0.fcaa.aaaa
00e0.fccc.cccc
Figure 3-2 Bridge learns that Workstation A is connected with Port 1
Once Workstation B responds to Workstation A, the bridge can detect the responding
Ethernet frame from Workstation B and learn that Workstation B is also connected to
Bridge port 1 because the frame is detected on port 1 too. As a result, the correlation
between the MAC address of Workstation B and Bridge port 1 is added to the bridging
table too, as shown in the following figure:
00e0.fcaa.aaaa
00e0.fccc.cccc
Figure 3-3 Bridge learns that Workstation B is connected with the port 1 too
At last, given that all the workstations are in use, the bridge will obtain all correlation
between the MAC addresses and the bridge ports as shown in the following figure:
Workstation A
Source address Destination address
00e0.fcaa.aaaa00e0.fcbb.bbbb
Bridging table
MAC address
Port
00e0.fcaa.aaaa 1
Bridge
Workstation C
Workstation A
Bridging table
MAC address
Port
00e0.fcaa.aaaa 1
1
00e0.fcbb.bbbb
Bridge
Workstation C
3Com Corporation
Chapter 3 Bridge Configuration
00e0.fcbb.bbbb
Bridge port 1
00e0.fcdd.dddd
Bridge port 2
00e0.fcbb.bbbb
Source address Destination address
00e0.fcbb.bbbb00e0.fcaa.aaaa
Bridge port 1
00e0.fcdd.dddd
Bridge port 2
3-3
Workstation B
Ethernet segment 1
Workstation D
Ethernet segment 2
Workstation B
Ethernet segment 1
Workstation D
Ethernet segment 2