I have had similiar problems but with ne2000 pci cards. The key seems to be three ethernet cards. If I use two cards I didn't see the problem (but I only ran it for 10 minutes or so). But with three cards the system hangs when issuing an route request "route" or listing the ipchain rules "ipchains -L" When in this state, the box would masquarade out to the internet for the private machines correctly, but wouldn't respond to an external PING request, or allow a connection to SSH deamon. taking one of the ethernet connections up and then back down tends to (but not always) correct the problem. On 3 Aug 00, at 22:50, Ben Greear wrote: > I've been running 8-hour+ traffic runs on RTL-8139 10/100 ethernet cards > connected by a 10/100 etherswitch and linux-kernel 2.2.14 <-> 2.2.16. > I'm using three cards in each machine, one for mgt, and two others for > data generation/testing. I use the ip command to set up source- based > routing policies to direct the ethernet traffic out over the correct > port. > > > Anyone know of any significant kernel problems with 2.2.14 or 2.2.16 > that might cause this? Any other ideas?? > > > When the system is in it's hosed up state, I see this on the side > that is trying to connect to the other: - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu