Configuration manual

Learning Limit Violation Actions
To configure the system to take an action when the MAC learning limit is reached on an interface and a
new address is received using one the following options with the mac learning-limit command, use
the following commands.
• Generate a system log message when the MAC learning limit is exceeded.
INTERFACE mode
learn-limit-violation log
• Shut down the interface and generate a system log message when the MAC learning limit is
exceeded.
INTERFACE mode
learn-limit-violation shutdown
Setting Station Move Violation Actions
no-station-move is the default behavior. You can configure the system to take an action if a station
move occurs using one the following options with the mac learning-limit command.
To display a list of interfaces configured with MAC learning limit or station move violation actions, use the
following commands.
• Generate a system log message indicating a station move.
INTERFACE mode
station-move-violation log
• Shut down the first port to learn the MAC address.
INTERFACE mode
station-move-violation shutdown-original
• Shut down the second port to learn the MAC address.
INTERFACE mode
station-move-violation shutdown-offending
• Shut down both the first and second port to learn the MAC address.
INTERFACE mode
station-move-violation shutdown-both
• Display a list of all of the interfaces configured with MAC learning limit or station move violation.
CONFIGURATION mode
show mac learning-limit violate-action
Recovering from Learning Limit and Station Move Violations
After a learning-limit or station-move violation shuts down an interface, you must manually reset it.
To reset the learning limit, use the following commands.
NOTE: Alternatively, you can reset the interface by shutting it down using the shutdown command
and then re-enabling it using the
no shutdown command.
Layer 2
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