Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Problem with Time-Domain Reflectometer (TDR)

Hi,

We have an C3560CG-8PC-S Switch with ios version 12.2(55)EX3.

I've tried to investigate a connection problem using the tdr tool.

It shows the following result from which I can't drag any useful information:

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/3     100M  Pair A     N/A                N/A         Not Completed       
                Pair B     N/A                N/A         Not Completed       
                Pair C     N/A                N/A         Not Completed       
                Pair D     N/A                N/A         Not Completed   

Port Speed is 100M, PoE is on an used with app. 7.0W

Can anyone help me out with this?

Thx in advance!

5 REPLIES
Hall of Fame Super Gold

On a 3560-series family of

On a 3560-series family of switches, sometimes a TDR takes a whopping 61 seconds before you issue the "sh cable tdr interface" command.

New Member

I've tried waiting some time

I've tried waiting some time before issuing the "sh cable-diag tdr interface ..." command.

But even after an hour nothing changend :-(

Hall of Fame Super Gold

Markus, TDR and 3560 ... they

Markus, 

TDR and 3560 ... they don't mix well.  Sometimes the feature works, sometimes it won't.  

 

Normally when I see this, I just change the cables at both ends.

New Member

Thx Leo,too bad :-(Changing

Thx Leo,

too bad :-(

Changing the cables was task anyway due to connection problems.

 

Hall of Fame Super Gold

Oh, and upgrade your IOS.

Oh, and upgrade your IOS.  The EX "series" of IOS is not designed for long-term production.  I like to call the EX-series of IOS as an interim-only IOS.  The objective is to get your switch "stable" (or close to) so you get it working until the main-line IOS is available.  

 

I'd recommend you look at upgrading to 15.0(2)SE4.  

88
Views
0
Helpful
5
Replies
CreatePlease login to create content