Interlogix NS3552-8P-2S-V2, User Manual

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Chapter 4: Web configuration
NS3552-8P-2S-V2 User Manual 245
Object Description
forward. To overcome this situation, select
Aging Enabled
. With aging
enabled, a timer is started once the end-host gets secured. When the timer
expires, the switch starts looking for frames from the end-host, and if these
frames are not seen within the next aging period, the end-host is assumed to
be disconnected, and the corresponding resources are freed on the switch.
Port configuration
The table has one row for each port on the selected switch and a number of columns,
which are:
Object Description
Port
The port number for which the configuration below applies.
Mode
Enable/disable Limit Control on this port. Both this and the Global Mode
must be set to Enabled for Limit Control to be in effect. Note that other
modules may 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 the 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 are 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 is exceeded.
Shutdown
: If Limit + 1 MAC addresses are seen on the port, shut down the
port. This implies that all secured MAC addresses will be removed from the
port and no new addresses 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 master 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 are 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 &