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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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mac learning-limit Dynamic

The MAC address table is stored on the Layer 2 forwarding information base (FIB) region of the CAM.

The Layer 2 FIB region allocates space for static MAC address entries and dynamic MAC address entries. When you enable MAC learning limit, entries created on this port are static by default. When you configure the dynamic option, learned MAC addresses are stored in the dynamic region and are subject to aging. Entries created before this option is set are not affected.

Dell EMC Networking OS Behavior: If you do not configure the dynamic option, the system does not detect station moves in which a MAC address learned from a MAC-limited port is learned on another port on the same system. Therefore, any configured violation response to detected station moves is not performed. When a MAC address is relearned on any other line card (any line card except the one to which the original MAC-limited port belongs), the station-move is detected and the system takes the configured the violation action.


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