What are the meanings of the current state and Line protocol current state fields displayed in the command output when checking the interface status on a switch

You can run the display interface command to view the running status and statistics about an interface.

display interface gigabitethernet 0/0/1
GigabitEthernet 0/0/1 current state : UP
Line protocol current state : UP
The meanings and differences between the current state field and Line protocol current state field in the command output are as follows:
-The current state field indicates the physical status of the interface and is not related to Layer 3 services and protocols.
-The Line protocol current state field indicates the link protocol status of the interface and is related to protocols.
-For Layer 2 interface: Generally, if the physical status current state displays Up, the protocol status Line protocol current state displays Up.
-For Layer 3 interfaces: Only when the physical status current state displays Up and the protocol negotiation succeeds, the protocol status Line protocol current state displays Up.

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