3com 4500 PWR 26-PORT Manual De Usuario

Ethernet port view

Enter a value in the range 0 to 32768 to specify how many MAC 

addresses a port can learn. 0 means that the port is not allowed to learn MAC 
addresses.

Use the 

 command to configure the maximum 

number of MAC addresses that can be learned by a specified Ethernet port. The 
port stops learning MAC addresses when the specified limit is reached.

Use the 

 command to cancel the 

maximum limit on the number of MAC addresses learned by an Ethernet port. This 
is the default. If you set no maximum limit, the MAC address table controls the 
number of MAC addresses a port can learn.

Related commands: 

, 

To configure the port “Ethernet 1/0/3” to learn at most 600 MAC addresses, enter 
the following:

<SW4500>sys

System View: return to User View with Ctrl+Z.

[SW4500]interface Ethernet 1/0/3

[SW4500-Ethernet1/0/3]mac-address max-mac-count 600

To cancel the maximum limit on the number of MAC addresses learned by the port 
“Ethernet1/0/3”, enter the following:

<SW4500>sys

System View: return to User View with Ctrl+Z.

[SW4500]interface Ethernet 1/0/3

[SW4500-Ethernet1/0/3]undo mac-address max-mac-count

mac-address timer { aging age | no-aging }

System view

 Specifies the aging time (measured in seconds) of the Layer-2 dynamic 

address table entry, ranging from 10 to 1000000; by default, the aging time is 300 
seconds.

 No aging time.