Latency issues in 1 section of LAN

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cgoudy

Commendable
Sep 11, 2016
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In my dental practice we have 10 PCs and a server connected through a 24-port switch. I built all PCs and server about 4 months ago. PCs are identical hardware. I ran new cat5e drops for 8 of the new PCs. These 8 run smooth with no latency issues. The remaining 2 are through the pre-existing cat5 in the walls. On these two computers I'm having load time issues accessing the database on the server. Internet speeds test the same on these two compared to the PCs on the new drops.

Any ideas where the problem may be coming from? Logic tells me it lies in the wiring between the 2 pcs and the switch but I wouldn't expect such a performance drop just because it's old wiring. Should I just run new drops and call it a day? Thanks!
 
Solution
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I would buy a long ethenet cable and run it over the floor just to test before you take any steps that are too expensive.

In general the wires in the wall seldom go bad. Any issue are generally with the connections on the wall plates. If they have never run properly it could be that they are mis wired or have something silly like only 2 pair connected. I would pull the plates and look for anything obvious. You I suppose could check and make sure the wire was cat5e or better but it would have to be almost 20yrs old to not be at least that.

In any case if you have someone come out to run the drops they should be able to test the wire with a meter to determine if the cabling is acutally bad. Unfortunately the meters are...
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B

bill001g

Titan
Aug 9, 2012
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I would buy a long ethenet cable and run it over the floor just to test before you take any steps that are too expensive.

In general the wires in the wall seldom go bad. Any issue are generally with the connections on the wall plates. If they have never run properly it could be that they are mis wired or have something silly like only 2 pair connected. I would pull the plates and look for anything obvious. You I suppose could check and make sure the wire was cat5e or better but it would have to be almost 20yrs old to not be at least that.

In any case if you have someone come out to run the drops they should be able to test the wire with a meter to determine if the cabling is acutally bad. Unfortunately the meters are expensive so if you are running the drops it will be cheaper to just blindly run new cable.

Still it is very rare for cable to go bad....maybe a rat eating it or something.
 
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nigelivey

Splendid
Dec 6, 2011
2,648
50
29,540
Obvious check the terminations first, bent pins etc. It's rare that in wall cabling fails but never underestimate mice!!

When you ping the server IP from these two machines is there added latency compared to the other machines? Have you tried moving the pc to another location and tried it on different cable, it may be just coincidence that they are on wire and the problem lies on the pc itself.
 
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WyomingKnott

WyomingKnott

Legenda in Aeternum
Aug 29, 2006
13,249
3
51,960
I vote for simple tests like running a long, known good cable down the corridor temporarily. Or swap the high-latency machine with another and see if the latency moves with the machine or stays with the cable.

At least you have a clear description of the problem. Sometimes, getting that from the person posting the question is like pulling teeth.
 
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C

cgoudy

Commendable
Sep 11, 2016
3
0
1,510
I'll run a long cable to assess, and do a new drop or two if I have no problems from there. I'll check termination for bent hardware also!Thanks for the responses guys.
 
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