Steve, What type medium are you using? If it is normal Cat5/6 then the limitation is 100 meters for total distance and as you approach that limit the signal degrades. That said, 100baseFX can run for 400 meters due to the fact that it is fiber, both are part of the fast Ethernet specification though. A repeater would boost signal, but perhaps a switch in there might not be a bad idea, segment the 27 floors into VLANs, reduce overall traffic traveling between floors and eliminate the 27 floor run. Hope this helps, Kristian P. Jackson -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Steve Rude Sent: Friday, January 10, 2003 3:01 PM To: nanog@merit.edu 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