periodic network down/up with printer
I recently installed a new HP Color LaserJet 2605dn network printer. It configures with BOOTP and works fine with CUPS. I can talk to the printer's web-browser-based configuration interface without trouble.
One thing is happening, however, that I don't understand: the network interface (eht1 in my case) that the printer is connected to keeps going down for about 2 seconds and then back up again. This (mostly) happens exactly one minute after the printer emits some sort of netBIOS/SMB UDP packet (I guess it's advertising it's presence on the network, but I don't know anything about SMB). It does this every 12 minutes. However, I have seen the eth1 down/up behavior without the SMB packet proceeding it - mostly, I think, after the printer has been communicated with.
Is this normal? If so what's happening? Is it the printer or the computer doing it? If it's not normal, could someone maybe provide me with some idea of where to start looking? If it helps, my system log file is full of entries like this:
Sep 30 15:33:40 localhost kernel: eth1: link down
Sep 30 15:33:42 localhost kernel: eth1: link up, 100Mbps, full-duplex, lpa 0x41E1
There are no other entries related to this. I am not running samba and there are no Windows machines on the network.
P.S. If this isn't a networking question, then I apologize - but it seemed more network related than printing related to me.