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268 Monitoring and Logging System Information
Running Cable Diagnostics
Beginning in Privileged EXEC mode, use the following commands to run the
cable diagnostic tests.
show process cpu Displays the CPU utilization for each process currently
running on the switch.
NOTE: Cable diagnostics may give misleading results if green mode is enabled
on the port. Disable green mode prior to running any cable diagnostics.
Command Purpose
test copper-port tdr
interface
Perform the Time Domain Reflectometry (TDR) test to
diagnose the quality and characteristics of a copper cable
attached to the specified port. SFP, SFP+, and QSFP
cables with passive copper assemblies are not capable of
performing TDR tests.
CAUTION: Issuing the test copper-port tdr command
will bring the interface down.
NOTE: To ensure accurate measurements, disable all Green
Ethernet modes (EEE or energy-detect mode) on the port
before running the test.
The interface is specified in unit/slot/port format. For
example 1/0/3 is GbE interface 3 on unit 1 of the stack.
show copper-ports tdr
[
interface
]
Display the diagnostic information collected by the test
copper-port tdr command for all copper interfaces or a
specific interface.
show fiber-ports optical-
transceiver [
interface
]
Display the optical transceiver diagnostics for all fiber
ports. Include the
interface
option to show information for
the specified port.
Command Purpose