Cable Diagnostics
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Cable Diagnostics
Use the Cable Diagnostics page to test the cable connected to a port on the device. The cable diag-
nostics uses Time Domain Reflectometry (TDR) technology to test the quality and characteristics of a
copper cable attached to a port. Cables up to 120 meters long can be tested.
To display the Cable Diagnostics page, click
Diagnostics
> Cable Diagnostics in the navigation pane.
Figure 53. Cable Diagnostics Page
Table 43. Cable Test Fields
CAUTION:
The link is forced down for the selected interface during the cable test period. As such,
a new IP address may be obtained when the link is restored, and the web session may
get disconnected.
Field
Description
Interface
Select the port with the connected cable to test.
Cable Status
Displays the cable status as one of the following:
Normal – The cable is working correctly.
Open – The cable is disconnected, or there is a faulty connector.
Open and short – There is an electrical short in the cable.
Cable status test failed – The cable status could not be determined. The cable may in
fact be working.
No Cable – The cable is not connected to the switch port.
Untested – A test has not been run on the cable since the switch last booted.
Cable test not supported for this interface – Cable test is not supported for this cable
type.
Cable Length
The estimated length of the cable in Meters. If the cable length cannot be determined,
Unknown is displayed. This field shows the range between the shortest estimated length and
the longest estimated length.
Note:
This field displays a value only when the cable status is Normal; otherwise, this field is
blank.