On Thursday 14 February 2002 11:16 pm, Yaron wrote: <snip> > Being a complete dork, I didn't test the first wire I put in. I just put > in about 12, punched everything down (using the 568B scheme), and THen > plugged a machine in one end and patched over to the switch on the other > end. > > Link light comes on, 100M light comes on, DHCP server sees machine send > request, machine doesn't see DHCP server send reply. > > I tested all the cables outside the walls and they're fine. I tried > several different machines and NICs, and it looks like they can all > transmit and not receive. <snip> If machines on both ends can transmit and not receive, then you have a confused wiring problem somewhere. Make sure that the white/colored side of each pair is the same on both ends. If you have dual-labeled 568A/B jacks, double and triple check that you looked at the right scheme. They're not that different, and this has frequently been my problem when I've screwed up the wiring scheme. :( I would take John up on his offer to loan you a tester that will show you which pairs are working and which are not. Dan