I've recently upgrade my desktop and I've noticed some odd behaviour with my network since then.. My machine is currently acting as the gateway for a small home LAN, I'm running dnsmasq to handle the forwarding and iptables for the firewall.
The odd behaviour is that any time my machine is under load the network cuts out all together, or only about 1 in 50 or so packets gets back from a ping. I should probably clarify that a little, the LAN side seems to work fine, it's the PPP interface thats locking up when I'm under load, which is sorta strange being that the modem is about the only thing I didn't change. I'm using a 3Com US Robotics 56K. Kernel version 2.4.19. With the PPP stuff build as modules. I'm not 100% sure if it is something to do with the new system, as I also upgraded from 2.4.18 to 2.4.19 when I did the hardware change.. I know I really should test that, and I will, but if anyone has any ideas as to what might be causing this problem some advice would be greatly appreciated. Thanks.