3Com 10014298 manual Setting MAC Address Table Entries

250CHAPTER 11: SYSTEM MANAGEMENT

switch learns and adds in the MAC address table. After this, subsequent packets destined for the same MAC address can be forwarded directly. 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 59 The Switch 7750 Forwards Packets According to the MAC Address Table

Configuring the MAC Address Table

	MAC Address	Port
	MACA	1
	MACB	1
MACD MACA ....	MACC	2
	MACD	2

Port 1

MACD MACA ....

Port 2

The Switch 7750 also provides the function of MAC address aging. If the switch does not receive a packet from a MAC address for a set period of time, it will delete the related entry from the MAC address table.

You can add or modify MAC address entries manually according to the actual networking environment. The entries can be static or dynamic.

MAC address table management includes:

■Setting MAC Address Table Entries

■Disabling or Enabling Global MAC Address Learning

■Disabling or Enabling MAC Address Learning on a Port

■Setting MAC Address Aging Time

■Displaying and Debugging the MAC Address Table

Setting MAC Address Table Entries

You can manually add, modify, or delete entries in a MAC address table according to actual needs. you can also delete all (unicast) MAC address table entries related to a specified port or delete a specified type of entries, such as dynamic or static entries.

Use the following commands to add, modify, or delete the entries in MAC address table.