Cisco switch Link status Up, Protocol down


I just bought a Cisco 3750X switch and when I did a sh ip int brief command, I see that my TE1/1/1 interface (it's a 10G port) has status up but protocol down.

Right now, this 10G port is connected to a NIC in a PC, but there is no traffic going in or out. Is this "status up/protocol down" normal? What does the "protocol" mean?

Best Answer

Protocol refers to "Line Protocol", which is a Cisco way of saying "the connection". Basically, up/down means the port is available for a cable/connection, but doesn't have one. Check the cable, or other computer.

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