Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 309

MAC Address Table Commands Dell EMC Networking N1100-ON/N1500/N2000/N2100-ON/N2200ON/N3000-ON/N3100-ON/N3200-ON Series Switches Dell EMC Networking switches implement a MAC Learning Bridge is compliance with IEEE 802.1Q. The switches implement independent VLAN learning (IVL). Dynamically learned MAC addresses are used to filter the set of ports on which a frame is forwarded within a VLAN, that is, the destination MAC address and ingress VLAN for a frame entering the switch is looked up in the MAC address table and, if a match is found, the frame is forwarded out the matching port(s). If no match is found, the frame is flooded out all ports in the VLAN except for the ingress port. When a frame is received on a port, the source MAC address (and VLAN) is looked up in the MAC address table. If no matching entry is found, a new entry is added to the MAC address table associated with the source port. If a matching entry is found, the matching entry timestamp is refreshed such that it will continue to remain in the MAC address table. Dynamic MAC address entries for which no frames have been received within the aging period are removed out of the MAC address table. The administrator can globally configure the MAC address aging timer. Administrators can configure static MAC address entries. Static MAC entries are treated in the same manner as dynamic MAC address entries for the purposes of frame forwarding. Static MAC addresses never age out of the MAC address database and can only be removed by administrator action. Port security allows the administrator to disable learning of MAC addresses on selected interfaces. Dynamically learned MAC addresses are flushed on an interface at the time port security is enabled. The interface then dynamically learns MAC addresses up to the configured limit and no more. The administrator may configure a limit of 0 in order to disable MAC learning on the interface entirely. In this configuration, it is advisable to configure static MAC entries on the interface in order to facilitate forwarding. clear mac address-table Use the clear mac address-table command to remove learned entries from the forwarding database. Layer 2 Switching Commands 309