Operation Manual – MAC Address Table Management
H3C S3100 Series Ethernet Switches
Chapter 1
MAC Address Table
Management
1-3
Eth1/0/1
Eth1/0/3
Eth1/0/4
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.
