H3C S5100-SI Series Operation Manual page 212

Operation Manual – MAC Address Table Management
H3C S5100-SI/EI Series Ethernet Switches
Generally, the majority of MAC address entries are created and maintained through
MAC address learning. The following describes the MAC address learning process of a
switch:
1) As shown in
communicates with User B, the packet from User A needs to be transmitted to
GigabitEthernet 1/0/1. At this time, the switch records the source MAC address of
the packet, that is, the address "MAC-A" of User A to the MAC address table of the
switch, forming an entry shown in
Figure 1-1 MAC address learning diagram (1)
Figure 1-2 MAC address table entry of the switch (1)
2) After learning the MAC address of User A, the switch starts to forward the packet.
Because there is no MAC address and port information of User B in the existing
MAC address table, the switch forwards the packet to all ports except
GigabitEthernet 1/0/1 to ensure that User B can receive the packet.
Figure 1-3 MAC address learning diagram (2)
Figure 1-1, User A and User B are both in VLAN 1. When User A
Figure
1-2
Chapter 1 MAC Address Table
1-2.
Management