> # Information About Interfaces

> The main function of a switch is to relay frames from one data link to another. To relay the frames, the characteristics of the interfaces through which the frames are received and sent must be defined. The configured interfaces can be Fibre Channel interfaces, Gigabit Ethernet interfaces, the management interface (mgmt0), or VSAN interfaces.

> This section includes the following topics:

> - Interface Description
> - Interface Modes
> - Interface States
> - Graceful Shutdown
> - Port Administrative Speeds
> - Speed LEDs
> - Speed LEDs
> - Bit Error Thresholds
> - SFP Transmitter Types
> - TL Ports
> - TL Port ALPA Caches
> - Port Guard
> - Port Monitor
> - Port Monitor Port Guard
> - Port Group Monitor
> - Local Switching
> - Management Interfaces
> - VSAN Interfaces

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