TDR Test issue on a switch

[vidiya]

Hi Team ,

The interface is frequently going down and comming up. I have done the TDR test and the result is as below.

TDR test last run on: April 15 02:11:57

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Fa0/27 100M Pair A 0 +/- 2 meters Pair A Short
Pair B 0 +/- 2 meters Pair A Short
Pair C N/A Pair A N/A
Pair D N/A Pair A N/A

I know the SHORT status means the cable got short circuited. so which means is it a faulty cable and need to change the cable?

Also can you please let me know what does this N/A status means?

Thanks for your explanation in advance.

Regards,
Vidiya.

 

[drebo]

Looks like there's a partial cut somewhere in the cable down the line. Reterminate it. If that doesn't fix it, replace it.

 

[vidiya]

Thanks a lot drebo. I will try this and let you know the outcome.

Do you aware of the status N/A? what does it mean?

So far i came across the test results which show all four cables but here the test results are visible only for two cables.

Regards,
Vidiya

 

[azazel1024]

That looks like that is the status of each twisted pair within a cable. I am assuming that its a Cat 5 cable with only two twisted pair instead of a cat5e/6/6a cable with four twisted pair in it.

If so, that is why the other two pairs are listed as N/A. They don't exist.

Or if it is a 5e/6/6a, that probably means that all of the wires are broken/incorrectly terminated and the default diagnosic return assumes that if it can't find 2 or more of the twisted pair, that its only a double pair cable instead of a quad pair cable so it lists the other two pairs as N/A.

 

[vidiya]

Thanks a lot azazel