D-Link xStack DGS-3420 Series Reference Manual page 191

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
Example
To test the cable on ports 1 to 4, and 8:
DGS-3420-28TC:admin# cable_diag ports 1:1-1:10,1:21
Command: cable_diag ports 1:1-1:10,1:21
Perform Cable Diagnostics ...
Port Type
------ ----------
1:1 1000BASE-T
1:2 1000BASE-T
1:3 1000BASE-T
1:4 1000BASE-T
1:5 1000BASE-T
1:6 1000BASE-T
1:7 1000BASE-T
1:8 1000BASE-T
1:9 1000BASE-T
1:10 1000BASE-T
1:21 1000BASE-X
DGS-3420-28TC:admin#
Link Status Test Result
------------- ----------------------------
Link Up OK
Link Up OK
Link Down Shutdown
Link Down Shutdown
Link Down Unknown
Link Down Pair 1 Crosstalk at
Pair 2 Crosstalk at
Pair 3 OK
Pair 4 OK
Link Down NO Cable
Link Down Pair 1 Open
Pair 2 Open
Pair 3 OK
Pair 4 OK
Link Down Pair 1 Short
Pair 2 Short
Pair 3 OK
Pair 4 OK
Link Down Pair 1 Unknown
Pair 2 Short
Pair 3 OK
Pair 4 OK
Link Up Unknown
30M
30M
at 110M
at 110M
at 16M
at 16M
at 50M
at 50M
at 5M
at 5M
at 110M
at 110M
at 5M
at 110M
at 110M
186
Cable Length (M)
------------
65
-
25
-
-
-
-
-
-
-
-