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DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch CLI Reference Guide
177
•
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
, 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
, 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
None.
Example
Test the cable on port 1, 11, and 12:
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