Maintenance Using Tdr - Dell Force10 MXL Blade Configuration Manual

Figure 13-24.
FTOS#monitor interface tengig 3/1
Dell Force10 uptime is 1 day(s), 4 hour(s), 31 minute(s)
Monitor time: 00:00:00
Interface: TenGig 3/1, Disabled, Link is Down, Linespeed is 1000 Mbit
Traffic statistics:
Input bytes:
Output bytes:
Input packets:
Output packets:
64B packets:
Over 64B packets:
Over 127B packets:
Over 255B packets:
Over 511B packets:
Over 1023B packets:
Error statistics:
Input underruns:
Input giants:
Input throttles:
Input IP checksum:
Input overrun:
Output underruns:
Output throttles:
m - Change mode
l - Page up
T - Increase refresh interval
q - Quit
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. Do not use TDR 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.
244 | Interfaces
Command Example
monitor interface
Refresh Intvl.: 2s
Input CRC:
Current Rate
0 0 Bps
0 0 Bps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
0 0 pps
c - Clear screen
a - Page down
t - Decrease refresh interval
Delta
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0