TP-Link T1500-28PCT TL-SL2428P T1500-28PCT V1 CLI Reference Guide - Page 88
loopback interface, show system-info, Device Name, Device Location, System Contact, Hardware Version
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loopback interface Description The loopback interface command is used to test whether the port is available or not. Syntax loopback interface { fastEthernet port | gigabitEthernet port } { internal | external } Parameter port -- The Fast/Gigabit Ethernet port number. internal | external -- Loopback Type. There are two options: "internal" and "external". Command Mode User EXEC Mode and Privileged EXEC Mode Example Do an internal-type loopback test for Gigabit Ethernet port 27: T1500-28PCT# loopback interface gigabitEthernet 1/0/27 internal Do an external-type loopback test for Gigabit Ethernet port 27: T1500-28PCT# loopback interface gigabitEthernet 1/0/27 external show system-info Description The show system-info command is used to display System Description, Device Name, Device Location, System Contact, Hardware Version, Firmware Version, System Time, Run Time and so on. Syntax show system-info Command Mode Privileged EXEC Mode and Any Configuration Mode Example Display the system information: T1500-28PCT# show system-info 77