Dell S3048-ON, Configuration Manual

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converted to sticky MACs on that interface. To remove all sticky MAC addresses from the running config file, disable sticky MAC and use
the
write config
command.
When you enable sticky mac on an interface, dynamically-learned MAC addresses do not age, even if you enabled mac-learning-
limit dynamic
. If you configured
mac-learning-limit
and
mac-learning-limit dynamic
and you disabled sticky MAC,
any dynamically-learned MAC addresses ages.
mac learning-limit station-move
The
mac learning-limit station-move
command allows a MAC address already in the table to be learned from another interface.
For example, if you disconnect a network device from one interface and reconnect it to another interface, the MAC address is learned on
the new interface. When the system detects this “station move,” the system clears the entry learned on the original interface and installs a
new entry on the new interface.
mac learning-limit no-station-move
The
no-station-move
option, also known as “sticky MAC,” provides additional port security by preventing a station move.
When you configure this option, the first entry in the table is maintained instead of creating an entry on the new interface. no-station-
move
is the default behavior. Entries created before you set this option are not affected.
To display a list of all interfaces with a MAC learning limit, use the following command.
Display a list of all interfaces with a MAC learning limit.
EXEC Privilege mode
show mac learning-limit
Dell Networking OS Behavior: The systems do not generate a station-move violation log entry for physical interfaces or port-channels
when you configure
mac learning-limit
or when you configure
mac learning-limit station-move-violation log
.
Dell Networking OS detects a station-move violation only when you configure
mac learning-limit dynamic
and logs the violation
only when you configure the
mac learning-limit station-move-violation log
, as shown in the following example.
Dell(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
no ip address
switchport
mac learning-limit 1 dynamic no-station-move
mac learning-limit station-move-violation log
no shutdown
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
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