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New Member

some ports are not working in cisco 2960 switch

some ports are not working in cisco 2960 switch suddenly.The tdr results for all the ports show same results.

GF_TEL_NEW2_175#sh cable-diagnostics tdr int fa 0/6
TDR test last run on: March 01 22:41:45

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- ---------------
Fa0/6     auto  Pair A     1    +/- 1  meters N/A         Open
                Pair B     0    +/- 1  meters N/A         Short
                Pair C     N/A                N/A         Not Supported
                Pair D     N/A                N/A         Not Supported
GF_TEL_NEW2_175#sh cable-diagnostics tdr int fa 0/7
TDR test last run on: March 01 22:49:26

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- ---------------
Fa0/7     auto  Pair A     1    +/- 1  meters N/A         Open
                Pair B     0    +/- 1  meters N/A         Short
                Pair C     N/A                N/A         Not Supported
                Pair D     N/A                N/A         Not Supported
GF_TEL_NEW2_175#sh cable-diagnostics tdr int fa 0/21
TDR test last run on: March 01 22:40:53

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- ---------------
Fa0/21    10M   Pair A     N/A                N/A         Normal
                Pair B     0    +/- 1  meters N/A         Short
                Pair C     N/A                N/A         Not Supported
                Pair D     N/A                N/A         Not Supported
GF_TEL_NEW2_175#sh cable-diagnostics tdr int fa 0/22
TDR test last run on: March 01 22:41:34

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- ---------------
Fa0/22    auto  Pair A     9    +/- 1  meters N/A         Open
                Pair B     0    +/- 1  meters N/A         Short
                Pair C     N/A                N/A         Not Supported
                Pair D     N/A                N/A         Not Supported

 

pl.give solution to solve the problem.

with regards

netteamicf

2 REPLIES
New Member

Cabling issue?  Try

Cabling issue?  Try connecting these ports with a new patch cable directly to a PC - bypass all of the internal wiring and re-test.
 

Hall of Fame Super Gold

TDR shows you've got cabling

TDR shows you've got cabling issues.  For FastEthernet, you need both Pair A and Pair B to be "Normal".  If you have results like "Open" or "Short", it's not good. 

 

Cable distance shows the cable directly connected to the ports are faulty.

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