Switch Management Commands 1986PHY Diagnostics CommandsThis section explains the following commands:show copper-ports tdrUse the show copper-ports tdr command to display the stored informationregarding cable lengths.Syntaxshow copper-ports tdr [interface]• interface — A valid Ethernet interface identifier.Default ConfigurationThis command has no default configuration.Command ModePrivileged Exec mode, Global Configuration mode and all ConfigurationsubmodesUser GuidelinesThe copper-related commands do not apply to the stacking or 10GBaseTports.The maximum length of the cable for the Time Domain Reflectometry(TDR) test is 120 meters. Disable green-mode on the port in order to obtainaccurate results.ExampleThe following example displays the last TDR tests on all ports.console#show copper-ports tdrPort Result Length [meters] Date--------- --------------------------- --------------- ---------------------show copper-ports tdr test copper-port tdrshow fiber-ports optical-transceiver –
