Learning Cisco Switch MAC Address

Learning a switch’s MAC address might be significant in some cases. For instance, in a switch topology, switches select a root switch first. Hence, when choosing that switch, look at the “Bridge-ID” value. The value comprises the bridge priority and the Switch MAC address. By default, the value of Bridge ID is 32768. If all of the switches have the same Bridge ID, the switches in the topology look at the Switch MAC address value to choose the root switch.

There are two methods for learning the Cisco switch’s MAC addresses. Typing the command below shows the switch’s MAC address.

Switch# show interfaces vlan 1

The second way to learn the Cisco switch’s MAC addresses is to use the “show version” command.

Switch# show version

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