D-Link DGS-3120-48PC Reference Manual page 162

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xStack
•
When the link partner is powered down with errors, this command can detect whether
the error is open, short, or crosstalk. In this case this command can also detect the
distance of the error
•
When there is no link partner with no errors and the link is up, this command can detect
the cable length
•
When there is no link partner with errors, this command can detect whether the error is
open, short, or crosstalk. In this case this command can also detect the distance of the
error
When the link partner is Gigabit Ethernet ports:
•
Where the link partner is powered on with no errors and the link is up, this command
can detect the cable length
•
Where the link partner is powered on with errors, this command can detect whether the
error is open, short, or crosstalk. In this case this command can also detect the distance of
the error
•
Where the link partner is powered down with no errors and the link is down, this
command cannot detect the cable length
•
When the link partner is powered down with errors, this command can detect whether
the error is open, short, or crosstalk. In this case this command can also detect the
distance of the error
•
When there is no link partner with no errors and the link is up, this command can
detect the cable length
•
When there is no link partner with errors, this command can detect whether the error is
open, short, or crosstalk. In this case this command can also detect the distance of the
error
Note: This test is only for copper cable. The fiber port is not tested. For the combo ports, only the
copper media will be tested.
The cable diagnosis does not support on the Pair 1 and 4 if the link partner is FE port.
If the link partner is FE port, the target port's link will be down after the test.
Format
cable_diag ports [<portlist> | all]
Parameters
<portlist> - Enter a list of ports used for the configuration here.
all – Specify that all the ports will be used for this configuration.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
DGS-3120 Series Managed Switch CLI Reference Guide
158