test cable-diagnostics tdr
To use Time Domain Reflectometry (TDR) technology to diagnose the quality and
characteristics of a copper cable attached to a port, use the test cable-diagnostics tdr Privileged EXEC mode command.
Syntax
test cable-diagnostics tdr interface interface-id
Parameters
interface-id—(Optional) Specifies an Ethernet port ID.
Command Mode
Privileged EXEC mode
User Guidelines
This command does not work on fiber ports (if they exist on the device). The port to be tested should be shut down during the test, unless it is a combination port with fiber port active. In this case, it does not need to be shut down, because the test does not work on fiber ports.
The maximum length of cable for the TDR test is 120 meters.
Examples
Example 1 – Test the copper cables attached to port te1/0/1 (a copper port).
switchxxxxxx# test cable-diagnostics tdr interface te1/0/1 Cable is open at 64 meters |
Example 2 – Test the copper cables attached to port 2 (a combo port with fiber active).
switchxxxxxx# test cable-diagnostics tdr interface te1/0/2 Fiber ports are not supported |
show cable-diagnostics tdr
To display information on the last Time Domain Reflectometry (TDR) test performed on all copper ports or on a specific copper port, use the show cable-diagnostics tdr Privileged EXEC mode command.
Syntax
show cable-diagnostics tdr [interface interface-id]
Parameters
- interface-id—(Optional) Specify an Ethernet port ID.
Command Mode
Privileged EXEC mode
User Guidelines
The maximum length of cable for the TDR test is 120 meters.
Example
The following example displays information on the last TDR test performed on all copper ports.
switchxxxxxx# show cable-diagnostics tdrPort Result Length Date---- -------- [meters] ------------------------------te1/0/1 OKte1/0/2 Short 50 13:32:00 23 July 2010te1/0/3 Test has not been performedte1/0/4 Open 64 13:32:00 23 July 2010 |
show cable-diagnostics cable-length
To display the estimated copper cable length attached to all ports or to a specific port, use the show cable-diagnostics cable-length Privileged EXEC mode command.
Syntax
show cable-diagnostics cable-length [interface interface-id]
Parameters
- interface-id—(Optional) Specify an Ethernet port ID.
Command Mode
Privileged EXEC mode
User Guidelines
The port must be active and working at 100 M or 1000 M.. The cable length results provided with this command may be effected if Green Ethernet Short Reach feature is enabled on the interface
Example
The following example displays the estimated copper cable length attached to all ports.
| switchxxxxxx#Port —te1/0/1 te1/0/2 te1/0/3 | show cable-diagnostics cable-length Length [meters]—————–< 50Copper not active110-140 |
show fiber-ports optical-transceiver
To display the optical transceiver diagnostics, use the show fiber-ports optical-transceiver Privileged EXEC mode command.
Syntax
show fiber-ports optical-transceiver [interface interface-id]
Parameters
- interface-id—(Optional) Specify an Ethernet port ID.
Default Configuration
All ports are displayed. If detailed is not used, only present ports are displayed.
Command Mode
Privileged EXEC mode
Example
ss
switchxxxxxx# show fiber-ports optical-transceiverPort Temp Voltage Current Output Input LOS[C] [Volt] [mA] Power Power[mWatt] [mWatt] ----------- ------ ------- ------- ------- ------- -- te1/0/1 Copper te1/0/2 Copperte1/0/3 28 3.32 7.26 3.53 3.68 No te1/0/4 29 3.33 6.50 3.53 3.71 NoTemp - Internally measured transceiver temperatureVoltage - Internally measured supply voltageCurrent - Measured TX bias currentOutput Power - Measured TX output power in milliWattsInput Power - Measured RX received power in milliWatts LOS - Loss of signal N/A - Not Available, N/S - Not Supported, W - Warning, E - Error |
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