Todd Pearsall wrote:
I would suspect a bad NIC or driver. If the box doesn't crash (sounds like it's still up if you can check the logs), try the following:Now for the problem, for the week or 2 (approx. the same time as the HW swap) I can't download files greater than about 2MB. It 1st appeared because some antivirus downloads were failing and later I noticed that any somewhat large file would just hand during download. When it hangs the cable modem shows no activity. Messages and auth.log are clear.Due to the timing I assume it's something with the firewall change, but can't image what and I never rule out Comcast messing with things. Could a bad NIC cause behavior like this? Other ideas.
First, try "kick-starting" the networking with "net reload". In addition to reloading your firewall rules (probably not necessary in this case), it will tear-down the low level network setup and re-build it. If this fixes your problem, you almost certianly have a bad NIC or flaky driver software. NOTE: This will *NOT* tear-down any interfaces not directly configured by the Dachstein network scripts (ie dhcp configured interfaces)...you'll have to do this manually.
If the above doesn't work, try stopping the network with "net stop", and manually removing the ethernet drivers. Then re-load the drivers, re-start the network and see if things are working again. If this fixes the problem, it also indicates a hardware and/or driver issue.
If you can reboot the box and everything is working OK, the problem is not likely to be with Comcast, even if you can't recover connectivity with the above methods.
Finally, make sure your new platform is OK. Run memtest86 for an hour or so to see if you have any random memory errors (which can cause lots of mysterious problems, and are not uncommon on old hardware). You might also want to do some googling on your chipset. There may be some early PCI chipsets/BIOSes that don't quite work right, and could cause strange problems.
You can also try using different NICs, to see if that helps.
--
Charles Steinkuehler
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