Allied-telesis AT-S63 User Manual download pdf (Page 367)

AT-S63 Management Software Web Browser Interface User’s Guide

Section VI: Port Security 367

4. From the Security Mode pull-down menu, select the desired port

security level for the port. Options are:

Automatic

Disables MAC address-based port security on a port. This is the

default setting.

Limited

Allows you to specify a maximum number of dynamic source MAC

addresses a port can learn. After learning its maximum number of

addresses, a port discards all ingress frames with source MAC

addresses not already learned.

When the Limited security mode is initially activated on a port, all

dynamic MAC addresses learned by the port are deleted from the

MAC address table. The port then begins to learn new addresses, up

to the maximum allowed. After the port has learned its maximum

number of addresses, it does not learn any new addresses, even when

end nodes are inactive.

A dynamic MAC address learned on a port operating in the Limited

security mode never times out from the MAC address table, even

when the corresponding end node is inactive.

Static MAC addresses are retained by the port and are not included in

the count of maximum dynamic addresses. You can continue to add

static MAC addresses to a port operating with this security level, even

after the port has already learned its maximum number of dynamic

MAC addresses. A switch port can have up to 255 dynamic and static

MAC addresses.

Secured

Instructs a port to forward frames using only static MAC addresses.

The port does not learn any dynamic MAC addresses and deletes any

dynamic addressees that it has already learned. Only those end nodes

whose MAC addresses are entered as static addresses are able to

forward frames through the port.

After activating this security level, you must enter the static MAC

addresses of the end nodes to be allowed to forward frames through

the port.

Locked

Instructs a port to immediately stop learning new dynamic MAC

addresses. Frames are forwarded using the dynamic MAC addresses

already learned by the port has and any static MAC addresses

assigned to the port.

Dynamic MAC addresses learned by the port prior to the activation of

this security level never time out from the MAC address table, even

when the corresponding end nodes are inactive. The port will not learn

any new dynamic addresses.

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Allied-telesis AT-S63 User Manual Page 367

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