I used to see these exact same results when I would setup Wireless pop's on towers taller than 400Ft. I was able to push the envelope a bit, however when I saw the issues that you speak of, it was when I had bad crimps, or sometimes a bad cable all together. Cat5 should be fine for this... if you figure 12ft risers you are probably cutting it close on the distance but not going over it.
-Scotty ----- Original Message ----- From: "Steve Rude" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, January 10, 2003 3:01 PM Subject: fast ethernet limits > > Hi NANOG, > > Could someone please help me with a fast ethernet problem I am having. We > have a POP in a 27 floor building, and have a rj45 run from the the bottom > of the building (in the telco room) to the top of the building. We have > cisco switches on either end and we are seeing about 5-20% packet loss on > the trunk. > > Are we running into a distance limitation of fast ethernet, or are we suffering > from another problem? I read that 328 feet is the limitation of fast > ethernet. Is there anything short of getting a repeater for the cable run > that I can do to boost the signal? > > TIA for your help. > > Ciao. > > Steve Rude > >