A random thought:
Check mac addresses, make sure they aren't the same.
Thanks for the thought.
That is a reasonable sanity check.
But as it happens, all the mac addrs on all these boxes are different --- i've accumulated a list of them due to various adventures in trying to get the networking functional :) :)
[Although, i guess i do not know the mac addr of the modem-router --- is there a user-level move i can make on my debian box to see what the mac addr of my modem-router is?]
dan
The reason for the two networks is that my modem-router is electrically incompatible with one of my computers.
hmm, I never heard about such things)
Is your electrical grounding configured correctly?
In my country some old apartments do not have third (ground) wire. I've seen a lot of glitches because of that.
Have you tried to install an ethernet switch?
yes i did, and it did not work --- just the fact that the router was in contact with the incompatible model even through a switch was enough to make it malfunction. :(
dan
You can connect your modem-router to the ethernet switch, and connect all PCs to this switch. It may help.