3Com 4210 PWR Configuration Manual page 137

Configuring a MAC
Address Entry
c
c
Setting the Aging Time
of MAC Address Entries
You can add, modify, or remove a MAC address entry, remove all MAC address
entries concerning a specific port, or remove specific type of MAC address entries
(dynamic or static MAC address entries).
You can add a MAC address entry in either system view or Ethernet port view.
Adding a MAC address entry in system view
Table 90 Add a MAC address entry in system view
Operation
Enter system view
Add a MAC address entry
CAUTION:
When you add a MAC address entry, the port specified by the interface
■
argument must belong to the VLAN specified by the vlan argument in the
command. Otherwise, the entry will not be added.
If the VLAN specified by the vlan argument is a dynamic VLAN, after a static
■
MAC address is added, it will become a static VLAN.
Adding a MAC address entry in Ethernet port view
Table 91 Add a MAC address entry in Ethernet port view
Operation
Enter system view
Enter Ethernet port view
Add a MAC address entry
CAUTION:
When you add a MAC address entry, the current port must belong to the VLAN
■
specified by the vlan argument in the command. Otherwise, the entry will not
be added.
If the VLAN specified by the vlan argument is a dynamic VLAN, after a static
■
MAC address is added, it will become a static VLAN.
Setting aging time properly helps effective utilization of MAC address aging. The
aging time that is too long or too short affects the performance of the switch.
If the aging time is too long, excessive invalid MAC address entries maintained
■
by the switch may fill up the MAC address table. This prevents the MAC
address table from being updated with network changes in time.
If the aging time is too short, the switch may remove valid MAC address
■
entries. This decreases the forwarding performance of the switch.
Configuring MAC Address Table Management
Command
system-view
mac-address { static |
dynamic | blackhole }
mac-address interface
interface-type
interface-number vlan vlan-id
Command
system-view
interface interface-type
interface-number
mac-address { static |
dynamic | blackhole }
mac-address vlan vlan-id
135
Description
-
Required
Description
-
-
Required