Configuring Mac Address Table Management; Entries In A Mac Address Table - Huawei Quidway S3900 Series Operation Manual

Operation Manual – MAC Address Table
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 1
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 categories according to their
characteristics and configuration methods:
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.
Dynamic MAC address entry: This type of MAC address entries age out after the
configured aging time. They are generated by the MAC address learning
mechanism or configured manually.
Blackhole MAC address entry: This type of MAC address entries are configured
manually. A switch discards the packets destined for or originated from the MAC
addresses contained in blackhole MAC address entries.
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
Static
address entry
Dynamic
address entry
Blackhole
address entry

1.2 Configuring MAC Address Table Management

The configuration to manage a MAC address table includes:
Configuring a MAC address entry
Configuring the aging time of MAC address entries
Configuration
method
MAC Manually
configured
Manually
configured
MAC
generated by MAC
address learning
mechanism
MAC Manually
configured
Huawei Technologies Proprietary
1-3
MAC Address Table Management
Aging time
Unavailable
or
Available
Unavailable
Reserved or not
at reboot (if the
configuration is
saved)
Yes
No
Yes