H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 29)

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To do… Use the command… Remarks
Configure the aging timer for
dynamic MAC address entries mac-address timer { aging seconds
| no-aging }
Optional
300 seconds by default.
The no-aging keyword disables the
aging timer.
You can reduce broadcasts on a stable network by disabling the aging timer to prevent dynamic entries
from unnecessarily aging out. By reducing broadcasts, you improve not only network performance, but
also security, because the chances for a data packet to reach unintended destinations are reduced.
Configuring the MAC learning limit
Configuring the MAC learning limit on ports
As the MAC address table is growing, the forwarding performance of your device may degrade. To
prevent the MAC address table from getting so large that the forwarding performance is affected, you
can limit the number of MAC addresses that can be learned on a port.
Follow these steps to configure the MAC learning limit on a Layer 2 Ethernet interface, Layer 2 VE
interface, Layer 2 aggregate interface, or all ports in a port group:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
Enter Layer 2 Ethernet/aggregate interface
view
interface interface-type interface-number
Enter port group view
port-group manual port-group-name
Required
Use either command.
Settings in Layer 2
Ethernet/aggregate interface
view take effect on the current
interface only. Settings in port
group view take effect on all
member ports in the port group.
Configure the MAC
learning limit on the
interface
mac-address max-mac-count count
Required
No MAC learning limit is
configured by default.
Configuring static multicast MAC address entries
In Layer-2 multicast, a Layer 2 multicast protocol (such as IGMP snooping) can dynamically add multicast
MAC address entries. Or, you can manually configure multicast MAC address entries.
Configuring a static multicast MAC address entry in system view
Follow these steps to configure a static multicast MAC address entry in system view
To do... Use the command... Remarks
Enter system view system-view —
Configure a static multicast MAC
address entry
mac-address multicast
mac-address interface interface-list
vlan vlan-id
Required
No static multicast MAC address
entries exist by default.