Chapter 3: Featuring Configuration
– Web UI
Featuring Configuration
– Web UI
NGSM48T2 User Manual | 69
Port Configuration
The table allows you to configure the Port Configuration parameters, which are:
Port
The port number to which the configuration below applies.
Mode
Controls whether Limit Control is enabled on this port. Both this and the Global
Mode must be set to Enabled for Limit Control to be in effect. Notice 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 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.
