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84 Address Table Commands
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port security
The
port security
Interface Configuration mode command locks the port. By locking the port, new
addresses are not learned on the port. To enable new address learning, use the
no
form of the
port
security
command.
Syntax
port security
[
forward
|
discard |
discard-shutdown
] [
trap
seconds
]
no port security
•
forward
—Forwards frames with unlearned source addresses, but does not learn the
address.
•
discard
—Discards frames with unlearned source addresses. This is the default if no
option is indicated.
•
discard-shutdown
—Discards frames with unlearned source addresses. The port is also
shut down.
•
trap
Seconds
—Sends SNMP traps and defines the minimal amount of time in seconds
between two consecutive traps. (Range: 1 - 1,000,000)
Default Configuration
Disabled - No port security
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
• There are no user guidelines for this command.
Example
In this example, frame forwarding is enabled without learning, and with traps sent every 100
seconds on port g1.
Console (config)# interface ethernet g1
Console (config-if)# port security forward trap 100
Console (config-if)# port security discard trap 100
Console (config-if)# port security discard-shutdown trap 100