PLANET SGSW-24040 - Manual (Page 262)

User’s Manual of SGSW-24040 / 24240 Series
262
• 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 stackswitch 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 everytime 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 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 stack or elect a new masterthe switch,
2) Disable and re-enable Limit Control on the port or the stackswitch,
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.
• Reopen 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.