Publication date: June, 2015
Revision A1
Limit :
The maximum number of MAC addresses that can be secured on this port. This number
cannot exceed 1024. If the limit is exceeded, the corresponding action is taken.
The switch is "born" with a total number of MAC addresses from which all ports draw
whenever a new MAC address is seen on a Port Security-enabled port. Since all ports draw
from the same pool, it may happen that a configured maximum cannot be granted, if the
remaining ports have already used all available MAC addresses.
Action :
If Limit is reached, the switch can take one of the following actions:
None: Do not allow more than Limit MAC addresses on the port, but take no further action.
Trap: If Limit + 1 MAC addresses is seen on the port, send an SNMP trap. If Aging is
disabled, only one SNMP trap will be sent, but with Aging enabled, new SNMP traps will be
sent every time the limit gets exceeded.
Shutdown: If Limit + 1 MAC addresses is seen on the port, shut down the port. This implies
that all secured MAC addresses will be removed from the port, and no new address will be
learned. Even if the link is physically disconnected and reconnected on the port (by
disconnecting the cable), the port will remain shut down. There are three ways to re-open
the port:
1) Boot the switch,
2) Disable and re-enable Limit Control on the port or the switch,
3) Click the Reopen button.
Trap & Shutdown: If Limit + 1 MAC addresses is seen on the port, both the "Trap" and the
"Shutdown" actions described above will be taken.
State :
This column shows the current state of the port as seen from the Limit Control's point of
view. The state takes one of four values:
Disabled: Limit Control is either globally disabled or disabled on the port.
Ready: The limit is not yet reached. This can be shown for all actions.
Limit Reached: Indicates that the limit is reached on this port. This state can only be shown
if Action is set to None or Trap.
Shutdown: Indicates that the port is shut down by the Limit Control module. This state can
only be shown if Action is set to Shutdown or Trap & Shutdown.
Re-open Button :
If a port is shutdown by this module, you may reopen it by clicking this button, which will
only be enabled if this is the case. For other methods, refer to Shutdown in the Action
section.
NOTE: That clicking the reopen button causes the page to be
refreshed, so non-committed changes will be lost
Upper right icon (Refresh):
You can click them for refresh the Port Security information by manual.
Buttons:
Apply – Click to save changes.
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