PHY Diagnostics Commands
Page 200
Chapter 20.PHY Diagnostics Commands
test copper-port tdr
The test copper-port tdr Privileged EXEC mode command uses Time Domain Reflectometry (TDR) technology
to diagnose the quality and characteristics of a copper cable attached to a port.
Syntax
test copper-port tdr interface
Parameters
•
interface — A valid Ethernet port. (Full syntax: unit/port)
Default Configuration
This command has no default configuration.
Command Mode
Privileged EXEC mode
User Guidelines
The port to be tested should be shut down during the test, unless it is a combination port with fiber port active.
The maximum length of the cable for the TDR test is 120 meter.
Example
The following example results in a report on the cable attached to port 1/e3.
show copper-ports tdr
The show copper-ports tdr User EXEC mode command displays information on the last Time Domain
Reflectometry (TDR) test performed on copper ports.
Syntax
show copper-ports tdr [interface]
Parameters
•
interface — A valid Ethernet port. (Full syntax: unit/port)
console#
test copper-port tdr
1/e3
Cable is open at 64 meters
console#
test copper-port tdr
2/e3
Can’t perform this test on fiber ports
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