Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 431

• c - Clear screen • a - Page down • q - Quit Dell#monitor interface Te 3/1 Dell uptime is 1 day(s), 4 hour(s), 31 minute(s) Monitor time: 00:00:00 Refresh Intvl.: 2s Interface: TeGi 3/1, Disabled, Link is Down, Linespeed is 1000 Mbit Traffic statistics: Current Input bytes: 0 Output bytes: 0 Input packets: 0 Output packets: 0 64B packets: 0 Over 64B packets: 0 Over 127B packets: 0 Over 255B packets: 0 Over 511B packets: 0 Over 1023B packets: 0 Error statistics: Input underruns: 0 Input giants: 0 Input throttles: 0 Input CRC: 0 Input IP checksum: 0 Input overrun: 0 Output underruns: 0 Output throttles: 0 Rate 0 Bps 0 Bps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps 0 pps Delta 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 m - Change mode l - Page up T - Increase refresh interval q - Quit c - Clear screen a - Page down t - Decrease refresh interval q Dell# Maintenance Using TDR The time domain reflectometer (TDR) is supported on all Dell Networking switch/routers. TDR is an assistance tool to resolve link issues that helps detect obvious open or short conditions within any of the four copper pairs. TDR sends a signal onto the physical cable and examines the reflection of the signal that returns. By examining the reflection, TDR is able to indicate whether there is a cable fault (when the cable is broken, becomes unterminated, or if a transceiver is unplugged). TDR is useful for troubleshooting an interface that is not establishing a link; that is, when the link is flapping or not coming up. TDR is not intended to be used on an interface that is passing traffic. When a TDR test is run on a physical cable, it is important to shut down the port on the far end of the cable. Otherwise, it may lead to incorrect test results. NOTE: TDR is an intrusive test. Do not run TDR on a link that is up and passing traffic. To test and display TDR results, use the following commands. 1. To test for cable faults on the GigabitEthernet cable. EXEC Privilege mode Interfaces 431