H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – MAC Address Table
H3C S7500 Series Ethernet Switches Chapter 1 MAC Address Table Management
1-3
You can manually configure (add or modify) a static or dynamic MAC address entry
based on the actual network environment.
 Note:
The switch learns only unicast addresses by using the MAC address learning
mechanism but directly drops any packet with a broadcast source MAC address.
1.1.2 Entries in a MAC Address Table
Entries in a MAC address table fall into the following two categories according to their
characteristics and configuration methods:
z Static MAC address entry: Also known as permanent MAC address entry. This
type of MAC address entries are added/removed manually and can not age out by
themselves. Using static MAC address entries can reduce broadcast packets
remarkably and are suitable for networks where network devices seldom change.
z Dynamic MAC address entry: This type of MAC address entries ages out after the
configured aging time. They are generated by the MAC address learning
mechanism or configured manually.
Table 1-1 lists the different types of MAC address entries and their characteristics.
Table 1-1 Characteristics of different types of MAC address entries
MAC address
entry
Configuration
method
Aging time
Reserved or not at
reboot (if the
configuration is saved)
Static MAC
address entry
Manually
configured
Unavailable Yes
Dynamic MAC
address entry
Manually
configured or
generated by MAC
address learning
mechanism
Available No
1.2 Configuring MAC Address Table Management
1.2.1 MAC Address Table Configuration Task List
Complete the following tasks to configure MAC address table: