Operation Manual – MAC Address Table Management
H3C S3100 Series Ethernet Switches
Chapter 1 MAC Address Table
Management
1-3
Eth1/0/1
Eth1/0/3Eth1/0/4
User A
User B User C
Figure 1-3 MAC address learning diagram (2)
3) Because the switch broadcasts the packet, both User B and User C can receive
the packet. However, User C is not the destination device of the packet, and
therefore does not process the packet. Normally, User B will respond to User A, as
shown in
Figure 1-4. When the response packet from User B is sent to Ethernet
1/0/4, the switch records the association between the MAC address of User B and
the corresponding port to the MAC address table of the switch.
Figure 1-4 MAC address learning diagram (3)
4) At this time, the MAC address table of the switch includes two forwarding entries
shown in
Figure 1-5. When forwarding the response packet, the switch unicasts
the packet instead of broadcasting it to User A through Ethernet 1/0/1, because
MAC-A is already in the MAC address table.
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