I take it that everything else works i.e. pinging other machines, internet connection and such.
Yes, internet is fine, pinging anything else is fine, printing to the other printer on the router's print server is fine (IP address is 192.168.2.1), nfs local network is fine. Only the print server at 192.168.2.50 isn't responding. It used to work.
First guess is a NIC problem especially if it is a flaky card.
But everything else works, and I can print to the print server in Windows. I'm going to boot into XP and check to see whether anything has changed in the IP address for the printer. I doubt it, since I assigned it. But with computer gremlins, who knows? I'm also going to see if anything is going on in the router administration I get to through a browser.
Have you made a new kernel or an upgrade all command.
No. I did upgrade CUPS from the VL repository and I did check the configuration for the printers in CUPS. However, the inability to ping happens before I start X. I use runlevel 2 and if I ping immediately after logging in, I get the Destination Host Unreachable message for the print server.
Second guess flaky kernel.
I didn't make any changes to VL 5.8 Standard GOLD's kernel. And why would pinging only this one address cause a problem due to the kernel?
Well, off to boot into Windows! Maybe I'll get a clue--though it works in Windows.