My office network has descended into chaos for some reason and I'm having a hell of a time sorting it out. I'm hoping someone can help bail me out. We need it up and running ASAP.
We have one outgoing WAN IP, then a machine running RHEL 4 acting as a gateway server (with 2 NICs). Internet comes in from the wall, goes to eth0, comes out of eth1 (which has a LAN IP of 192.168.0.7), then to a 16-port switch. A dozen other computers are attached to said switch and all have IPs in the 192.168.0.x range. We used to have a series of tiered 5/8 port switches but got a single 16 port to reduce cable clutter and simplify the networking (so we thought). For some reason now, some of the computers can ping each other and get to the net, but others cannot. And the ones that can sporadically drop. There does not seem to be any logic to which ones work and which do not. I have 3 identical machines (a linux cluster), and one works and the other two do not. Some of the clients run RHEL 4, some Ubuntu, some WinXP - there is no common factor behind which work and which do not. They all worked yesterday with the stacked switches - although when I plugged it all back in the way it was, it doesn't work anymore. I'm tearing my hair out here. Can anyone help me? The OIT helpdesk won't help since we're not running Windows. Any suggestions would be greatly appreciated. If someone was willing to actually come by the Chemical and Nuclear Engineering building (090 - room 1231) and help me out, they're welcome to an item from my 'computer parts graveyard' as a token of my gratitude. - Justin Walker
