Reference Guide

Address Table Commands 435
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• discard —Discards packets with unlearned source addresses.
•
discard-shutdown —Discards packets with unlearned source addresses and
shuts down the port.
•
trap seconds —Sends SNMP traps and specifies the minimum time
interval in seconds between consecutive traps. (Range: 1–1000000)
Default Configuration
The feature is disabled by default.
The default mode is discard.
The default number of seconds is zero, but if traps is entered, a number of
seconds must also be entered.
Command Mode
Interface (Ethernet, Port Channel) Configuration mode
User Guidelines
The command may be used only when the interface in the regular (non-
secure with unlimited MAC learning) mode.
See the
mac address-table static command for information about MAC
address attributes (type and time-to-live) definitions.
When the port security command enables the lock mode on a port all
dynamic addresses learned on the port are changed to permanent secure
addresses.
When the port security command enables a mode on a port differing from
the lock mode all dynamic addresses learned on the port are deleted.
When the no port security command cancels a secure mode on a port all
secure addresses defined on the port are changed to dynamic addresses.
Additionally to set a mode, use the port security command to set an action
that the switch should perform on a frame which source MAC address cannot
be learned.