3Com 7700 Configuration Manual page 224

8 C 11: S M
HAPTER YSTEM
MAC Address Table
Configuration
ANAGEMENT
MAC address of the device, which will then be learned and added into the MAC
address table by the Ethernet switch. The consequent packets destined for the
same MAC address can be forwarded directly thereafter. If the MAC address
cannot be found after broadcasting the packet, the switch will drop it and notify
the transmitter that the packet did not arrive at the destination.
Figure 1 The Switch 7700 Forwards Packets According to the MAC Address Table
MACD MACA
Port 1
The Switch 7700 also provides the function of MAC address aging. If the switch
receives no packet for a period of time, it will delete the related entry from the
MAC address table. However, this function has no effect on the static MAC
addresses.
You can configure (add or modify) the MAC address entries manually according to
the actual networking environment. The entries can be static ones or dynamic
ones.
MAC address table management includes:
Set MAC Address Table Entries
■
Disable/Enable Global MAC Address Learning
■
Disable/Enable MAC Address Learning on a Port
■
Set MAC Address Aging Time
■
Set MAC Address Table Entries
Administrators can manually add, modify, or delete the entries in MAC address
table according to the actual needs. They can also delete all (unicast) MAC
address table entries related to a specified port or delete a specified type of
entries, such as dynamic entries or static entries.
You can use the following commands to add, modify, or delete the entries in MAC
address table.
MAC Address Port
MACA
MACB
MACC
....
MACD
MACD MACA
Port 2
1
1
2
2
....