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Old 07-03-2004, 12:30 AM   #1
Registered: May 2004
Location: Iowa USA
Distribution: CentOS
Posts: 419

Rep: Reputation: 30
weird network problem

I have 5 boxes, all with internal addresses. The set up:

Box 1 is Win2K Server, IP
Box 2 is Win98, IP
Box 3 is Red Hat 9, IP

Net mask is for everyone.

Boxes 2 and 3 are on the same hub (downstairs). Box 1 and the unnamed boxes are on the same hub, with a downlink to the other hub where Boxes 2 and 3 are. Everyone was living happy and content and all could connect as needed.

Then I went on vacation. I needed to borrow some Cat-5 for on-the-road connectivity, so I took the chunk from the hub downstairs to Box 3 (Linux) (this is a red herring!). Then I shut Boxes 2 and 3 down, which does not happen often.

So I come back, boot up Box 3, and no connection from Box 1 to Box 3. Oops, forgot the cable. Patch it in, and still no connection from Box 1 (using PuTTY). Figure Box 3 didn't boot right, and reboot it. Still no joy. Hook up a monitor, and start pinging all over the place. I can ping Box 2 (on the same hub), but not Box 1 (on the upstairs hub). I jump on Box 2, and I can ping both Box 3 (Linux, on the same hub) and Box 1 (Win2K, on the hub upstairs), so it can't be a hub problem.

In short, Box 2 (on the same hub as Linux) can ping and get pinged by everyone. Box 1 can ping everyone except Box 3. Box 3 can ping no one except Box 2, on its same hub, and can get pinged by no one except Box 2.

To further add to the mess, even though Box 2 can ping Box 3, it cannot open an http session with it, even though httpd is running on Box 3.

It seems like the routing table on Box 3 is hosed, or something?

TIA for any help!
Old 07-03-2004, 02:26 AM   #2
Registered: Aug 2003
Location: Portland, Oregon
Distribution: RedHat, Libranet
Posts: 438

Rep: Reputation: 30
Try power cycling your hubs.
Old 07-03-2004, 08:17 AM   #3
Registered: May 2004
Location: Iowa USA
Distribution: CentOS
Posts: 419

Original Poster
Rep: Reputation: 30
Hi, thanks for the the reply.

That didn't work. I didn't think it would, since Boxes 2 and 3 are on that same hub, and Box 2 can ping everywhere but Box 3 can only ping Box 2.

Any other ideas?


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