Application Guide

[61]
Software User's
Manual
–
Version 3.0
Port Configuration
The table has one row for each port on the switch and a number of columns.
Setting Description
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 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 address
es
will be learned. Even if the link is physically