Setting The Max Count Of Mac Addresses Learned By A Port; Displaying Mac Address Table - 3Com Switch 4500 26-Port Configuration Manual

Setting the Max Count
of MAC Addresses
Learned by a Port
Displaying MAC
Address Table
Table 260 Set the MAC Address Aging Time for the System
Operation
Set the dynamic MAC address aging time
Restore the default MAC address aging time undo mac-address timer aging
In addition, this command takes effect on all the ports. However the address aging
only functions on the dynamic addresses (manual entries added to the Switch are
not aged).
By default, the
aging-time
command performs no aging on the MAC address entries.
With the address learning function, a Switch can learn new MAC addresses. After
it receives a packet destined for an already learned MAC address, the Switch will
forward it directly with the hardware, instead of broadcasting it. However, too
many MAC address items learned by a port will affect the Switch operation
performance.
You can control the MAC address items learned by a port through setting the max
count of MAC addresses learned by a port. If a user sets the max count value of a
port as , the port will not learn new MAC address items when the count of
count
MAC address items reaches the
You can use the following commands to set the max count of MAC addresses
learned by a port.
Perform the following configuration in Ethernet Port View.
Table 261 Set the Max Count of MAC Address Learned by a Port
Operation
Set the Max Count of MAC Address
Learned by a Port
Restore the default Max Count of MAC
Address Learned by a Port
By default, there is no limit to the MAC addresses learned via the Ethernet port.
After the above configuration, execute the
display the running of the MAC address table configuration, and to verify the
effect of the configuration.
Execute the
debugging
configuration.
Table 262 Display and Debug MAC Address Table
Operation
Display the information in the
address table
Command
mac-address timer { aging age |
no-aging }
is 300 seconds. With the
value.
count
Command
mac-address max-mac-count count
undo mac-address max-mac-count
display
command in User View to debug MAC address table
Command
display mac-address [ mac-addr [ vlan
vlan-id ] | [ static | dynamic | blackhole
] [ interface { interface-name |
interface-type interface-num } ] [ vlan
vlan-id ] [ count ] ]

Displaying MAC Address Table

parameter, the
no-aging
command in all views to
241