Concept Guide

● 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
NOTE: When the MAC learning limit (MLL) is configured as no-station-move, the MLL will be processed as static
entries internally. For static entries, the MAC address will be installed in all port-pipes, irrespective of the VLAN
membership.
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.
● Reset interfaces in the ERR_Disabled state caused by a learning limit violation or station move violation.
EXEC Privilege mode
mac learning-limit reset
● Reset interfaces in the ERR_Disabled state caused by a learning limit violation.
EXEC Privilege mode
mac learning-limit reset learn-limit-violation [interface | all]
● Reset interfaces in the ERR_Disabled state caused by a station move violation.
EXEC Privilege mode
mac learning-limit reset station-move-violation [interface | all]
Disabling MAC Address Learning on the System
You can configure the system to not learn MAC addresses from LACP and LLDP BPDUs.
To disable source MAC address learning from LACP and LLDP BPDUs, follow this procedure:
● Disable source MAC address learning from LACP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning lacp
● Disable source MAC address learning from LLDP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning lldp
● Disable source MAC address learning from LACP and LLDP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning
If you don’t use any option, the mac-address-table disable-learning command disables source MAC address
learning from both LACP and LLDP BPDUs.
Enabling port security
You can enable or disable port security feature globally on the Dell EMC Networking OS.
You can configure all the MAC address learning limit configurations, only if the port security is enabled on the Dell EMC
Networking OS. If the port security feature is disabled, all the interface level configurations are reset and all dynamically learnt
MAC addresses on the interfaces configured with MAC address learning limit are cleared.
To enable the port security feature globally in the system, use the following command.
● Enable the port security feature.
CONFIGURATION mode
Layer 2
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