Maintenance Using Tdr - Dell Force10 S4810P Configuration Manual

Over 255B packets:
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Error statistics:
Input underruns:
Input giants:
Input throttles:
Input CRC:
Input IP checksum:
Input overrun:
Output underruns:
Output throttles:
m - Change mode
l - Page up
T - Increase refresh interval
q - Quit
q
FTOS#

Maintenance using TDR

The Time Domain Reflectometer (TDR) is supported on all Dell Force10 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.
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c - Clear screen
a - Page down
t - Decrease refresh interval
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