H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – MAC Address Table Management
H3C S7500E Series Ethernet Switches
Chapter 1 MAC Address Table Management
Configuration
1-1
Chapter 1 MAC Address Table Management
Configuration
When configuring MAC address table management, go to these sections for
information you are interested in:
z Introduction to MAC Address Table
z Configuring MAC Address Table Management
z Displaying and Maintaining MAC Address Table Management
z MAC Address Table Management Configuration Example
 Note:
This manual covers only static, dynamic and blackhole MAC address table
management. For the management of multicast MAC address table management, refer
to Multicast Protocol Configuration.
1.1 Introduction to MAC Address Table
A device maintains a MAC address table for frame forwarding. Each entry in this table
indicates the MAC address of a connected device, to which interface this device is
connected and to which VLAN the interface belongs.
A MAC address table consists of two types of entries: static and dynamic. Static entries
are manually configured and never age out. Dynamic entries can be manually
configured or dynamically learned and may age out.
The following is how your device learns a MAC address after it receives a frame from a
port, Port 1 for example:
1) Check the frame for the source MAC address (MAC A for example).
2) Look up the MAC address table for an entry corresponding to the MAC address
and do the following:
z If an entry is found for the MAC address, update the entry.
z If no entry is found, add an entry for the MAC address and indicate from which port
the frame is received.
When receiving a frame destined for MAC A, the device then looks up the MAC address
table and forwards it from port 1.