ES-2048 User’s Guide

Table 37 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 address learning

Learning

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

Limited Number

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

of Learned MAC

on a port. For example, if you set this field to "5" on port 2, then only the devices with

Address

these five learned MAC addresses may access 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 “254”. “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 reset the fields.

Chapter 17 Port Security

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