Chapter 19 Port Security

Table 43 Advanced Application > Port Security (continued)

LABEL

DESCRIPTION

*

Settings in this row apply to all ports.

 

Use this row only if you want to make some settings the same for all

 

ports. Use this row first to set the common settings and then make

 

adjustments on a port-by-port basis.

 

Note: Changes in this row are copied to all the ports as soon as you

 

make them.

 

 

Active

Select this check box to enable the port security feature on this port. The

 

Switch forwards packets whose MAC address(es) is in the MAC address

 

table on this port. Packets with no matching MAC address(es) are

 

dropped.

 

Clear this check box to disable the port security feature. The Switch

 

forwards all packets on this port.

 

 

Address

MAC address learning reduces outgoing broadcast traffic. For MAC

Learning

address learning to occur on a port, the port itself must be active with

 

address learning enabled.

 

 

Limited

Use this field to limit the number of (dynamic) MAC addresses that may

Number of

be learned on a port. For example, if you set this field to "5" on port 2,

Learned MAC

then only the devices with these five learned MAC addresses may access

Address

port 2 at any one time. A sixth device would have to wait until one of the

 

five learned MAC addresses aged out. MAC address aging out time can be

 

set in the Switch Setup screen. The valid range is from “0” to “16384”.

 

“0” means this feature is disabled.

 

 

Apply

Click Apply to save your changes to the Switch’s run-time memory. The

 

Switch loses these changes if it is turned off or loses power, so use the

 

Save link on the top navigation panel to save your changes to the non-

 

volatile memory when you are done configuring.

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

 

173

MGS-3712/MGS-3712F User’s Guide