HP 2320 network printer keeps dropping off network

I have a small home network, running off a current gen TimeCapsule. I have an HP Colorlaser CM2320 network laser printer connected to a 5-port switch on the network. Randomly, the printer disappears. When selected in a print dialog, the satus is offline. But of course, it's not offline. It's connected and powered on, the switch is connected and powered on. I have powered cycled the printer, the switch, and the TimeCapsule. No success. Later, the printer magically becomes visible again. Later still, is goes away. This is driving me and my family crazy. The most recent problem started a few days ago. I printed several documents with no problem. My wife later in the day tried to print, but nothing. I spent several hours power cycling all the devices, plugging and unplugging ethernet cables, but no success. The next day, all of a sudden it starts printing my wife's document. A few hours pass, and I want to print, but the printer has again disappeared. It has not come back in two days now.
Thanks to anyhone who can help. Rick

Betcha it is Lion on the computer.. I have a network HP laser and it never goes offline with SL.. and TC running good old reliable 7.5.2 firmware.
The printer name and IP must be recognised by the Mac.. did you lock the values on the printer or are you using dhcp?
I recommend for printer lock the IP and name in the printer setup.
If you still have issues see if you can ping the printer.. by IP and by Name.. if it fails please post the details of what actually fails.. For Lion and latest TC firmware Apple have some way to go to fix networking issues.

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