Use the show lanset command to display the ports‘ speed — the data transmission rate of an output/input channel on each port.
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EWC.extremenetworks.com# show lanset Port name: admin Port Auto Negotation: On Port Speed: Any Port Duplex: Both Port Name: lan1 Port Auto Negotation: On Port Speed: Any Port Duplex: Both Port Name: lan2 Port Auto Negotation: On Port Speed: Any Port Duplex: Both