[lug] Tad OT: Cat 5 cable interference?

Mr Viggy LittleViggy at alum.manhattan.edu
Wed Jan 2 07:41:20 MST 2002


I believe that Mr. Stimits is correct.  Double check all your
connections, or force all your cards into 10MBit mode.  If putting the
cards into 10MBit fixes the problem, then you are using the wrong
cable.  :-)

I had a similar problem recntly.  I was running CAT 5e; but put a "CAT
5" wall connector on it.  I was getting 99-100% packet loss!!!  I
returned the wall connector, and got a "5e" rated connector, and all the
problems are now gone!

Viggy

"D. Stimits" wrote:
> 
> Justin wrote:
> >
> > I have a winXP computer that is attached to my linux dhcp server via a
> > 25' cat 5 network cable. I routed the cable under our condo into
> > another room. The winXP computer seems to work ok about 75% of the
> > time. If I ping the dhcp server I sometimes get packet loss and also
> > the winXP box occasionally will not pull it's ip from the linux dhcp
> > server. What I was wondering is if fiberglass insulation (or anything
> > else under the house) could be interfering with the network
> > connection? In the holes I drilled to put the cat 5 through I stuffed
> > fiberglass insulation in there packed right in w/ the cable. So I
> > don't know if this is causing any sort of problem or not. Thanks for
> > any help.
> >
> > Justin
> > -----
> > glow at jackmoves.com
> > www.jackmoves.com
> > _______________________________________________
> > Web Page:  http://lug.boulder.co.us
> > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> 
> I doubt anything non-metallic would hurt it. But if you crush or bend
> sharply RF cables, that can be bad for quality. Or winding it a lot
> (adds inductance). More often connectors are on improperly, or the cable
> itself was the wrong thing for the job to start with. If it is a 100
> MBit/sec network, you should have the "fast cat" (cat 5e I think) cable.
> If you put your own connectors on, be double sure that they are perfect.
> 
> D. Stimits, stimits at idcomm.com
> _______________________________________________
> Web Page:  http://lug.boulder.co.us
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