Cisco Tip: MAC Addresses (CatOS vs IOS)

When working with switches, it always helps to know what is connected to them. Switches work at the Data Link (MAC) Layer of the OSI Model (Layer 2) and any device that is connected to a switch has its own unique Layer 2 (MAC) address. The command you enter to view a switch's MAC address is determined by what type of software (CatOS or IOS) the switch is running. Let's take a look at each command:



CatOS

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show cam dynamic



IOS

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show mac-address-table dynamic





Stay tuned for more command differences between CatOS and IOS!