ECS4110-28T_Management Guide

C HAPTER 27 | Interface Commands
Cable Diagnostics
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COMMAND USAGE
◆ The switch can display diagnostic information for SFP modules which
support the SFF-8472 Specification for Diagnostic Monitoring Interface
for Optical Transceivers. This information allows administrators to
remotely diagnose problems with optical devices. This feature, referred
to as Digital Diagnostic Monitoring (DDM) in the command display,
provides information on transceiver parameters including temperature,
supply voltage, laser bias current, laser power, received optical power,
and related alarm thresholds.
◆ The DDM thresholds displayed by this command only apply to ports
which have a DDM-compliant transceiver inserted.
EXAMPLE
Console#show interfaces transceiver-threshold ethernet 1/52
Information of Eth 1/52
DDM Thresholds
Transceiver-monitor : Disabled
Transceiver-threshold-auto : Enabled
Low Alarm Low Warning High Warning High Alarm
----------- ------------ ------------ ------------ ------------
Temperature(Celsius) -123.00 0.00 70.00 75.00
Voltage(Volts) 3.10 3.15 3.45 3.50
Current(mA) 6.00 7.00 90.00 100.00
TxPower(dBm) -12.00 -11.50 -9.50 -9.00
RxPower(dBm) -21.50 -21.00 -3.50 -3.00
Console#
Cable Diagnostics
test cable-
diagnostics
This command performs cable diagnostics on the specified port to diagnose
any cable faults (short, open, etc.) and report the cable length.
SYNTAX
test cable-diagnostics interface interface
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-24/48)
COMMAND MODE
Privileged Exec
COMMAND USAGE
◆ Cable diagnostics are performed using Digital Signal Processing (DSP)
test methods. DSP analyses the cable by sending a pulsed signal into
the cable, and then examining the reflection of that pulse.