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Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

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mac learning-limit mac-address-sticky

Using sticky MAC addresses allows you to associate a specific port with MAC addresses from trusted devices. If you enable sticky MAC, the specified port retains any dynamically-learned addresses and prevents them from being transferred or learned on other ports.

If you configure mac-learning-limit and you enabled sticky MAC, all dynamically-learned addresses are converted to sticky MAC addresses for the selected port. Any new MAC addresses learned on this port is converted to sticky MAC addresses.

To save all sticky MAC addresses into a configuration file that can be used as a startup configuration file, use the write config command. If the number of existing MAC addresses is fewer than the configured mac learn limit, any additional MAC addresses are 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.

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