I have two HP 2100 laser printer on my home network with Jetdirect cards.
Both have fixed IP addresses and work fine, EXCEPT - if not used for a few
hours or sometimes days they are liable to vanish from the network, not to
return unless switched off and then back on again.

I wondered if something else was pinching their ip addresses, (we have
holiday cottages who's occupants have web access so ip addresses get given
out as they come and go) so moved the printers way up the map, and took
those ip addresses out of the pool for the DHCP to dish out. No change -
they still sometimes just vanish Can be hours or sometimes days.

Any suggestions gratefully received

Andrew