User Manual
3onedata proprietary and confidential
Copyright © 3onedata Co., Ltd.
63
still use the underlying port security features without enabling Limit Control on a given
port.
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.
Status
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 this port has reached its limit. 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.
