Allied Telesis AT-S25 - Manual (Page 71)

AT-S25 Management Software User’s Guide
71
Configuring the Limited Security Mode
The Limited security mode lets you set a maximum number of dynamic
MAC addresses each port on a switch can learn. When you activate this
security level, the switch deletes all MAC addresses in the dynamic MAC
Address Table and immediately begins to learn new addresses as frames
are received on the ports. Once the maximum number of MAC addresses
have been learned by a port, frames with new source MAC addresses are
discarded and are not forwarded.
You could assign the same limit to all ports or different limits to different
group of ports.
Static MAC addresses are not deleted from the static MAC Address Table.
Static MAC addresses are not included in the count of the maximum
MAC addresses a port can learn. You could continue to add static MAC
addresses even after a port has learned its maximum number of dynamic
MAC addresses.
To configure Limited security mode, perform the following procedure:
1. Perform the first three steps mentioned in Configuring Port Security
on page 69.
2. Type L to select the Limited mode, and press the Enter key.
The following prompt is displayed:
NOTE: All dynamically learned MAC addresses will be
deleted and the MAC
counters will be reset.
Do you want to continue? [Yes/No] ->
3. Type Y for Yes, or N to cancel the procedure.
If you select Y, continue with the following steps:
4. From the Port Security menu, type 2 to select Port Security Limited-
Mode menu.
The Port Security Limited-Mode menu in Figure 20 is displayed.