3.10 Port Security

Port Security allows you to restrict specific MAC addresses to reside in some port. For example, a dummy hub is attached to some port for extension, and you just only allow 2 users to access this port at the same time, you can use the port security window to set the parameters.

Figure 3-9. The Port Security page

To restrict the number of MAC address to reside in a port, you must do the following :

Click the “ Enable “ checkbox for that port. IF the “ Enable “checkbox is uncheck, there is no MAC address count restriction for that port.

Type the number in the “ Max Allowed MAC Address Count “ edit for that port. The upper bound of this number is the “ Max Allowed MAC Address Count per port “

Press the “ Press “ button

The “ Used Count “ will tell you how many MAC address residing in the corresponding port now.

Note : A trunked port is not allowed to enable the port security option.

3.11 Port Priority-802.1p

There are two priority queues ( high and low ) on each port. Each port arbitrates between two transmit queues ( high and low priority ).

The arbitration uses weighted round-robin between the high and low priority queues, and you can adjust this weight.

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