> That is just plain wrong. You should not need a connection to your external > router in order to ping between two internal machines (assuming you are > pinging the real IP addresses, and not relying on a DNS lookup or something). Indeed.... > Your IRQ/address etc setup looks fine to me, however there is clearly > something weird about the network hardware arrangement for you to get the > above-described ping behaviour. Such as the router and the switch being connected for no reason? I was obviously on crack when I set that up.... just found out that was the problem.... strange that everything would work perfectly for hours then stop working for minutes, etc... probably a table filling up in the switch or the router or both :-) Well, I made you waste a few minutes and wasted a nice sunday morning doing this instead of being with my girlfriend, on the bright side I got a spare network cable, give me your address if you want a slice :-) Thanks!