config - iMac with 3 serial printers attached. A label printer, a HL-5240 and a Laserjet 5P.
Since sharing of printer on network only works over wireless, not only is the iMac wired but also is wireless.
Airporter wireless router for wireless, and a main router that also has 3 cameras, 1 network printer, eMac and MacBook Pro.
The MacBook is the main computer used at the office - and it is also connected wired and wireless. The label printer is used only from the iMac.
The router is setup correctly and use manual dhcp for addrs.
As I understand it, the ONLY way to share printers with mac's is to do it wireless. I spend days trying to get printer sharing to work wired and the shared printers on the iMac would not show up on the MacBook Pro. Finally got a tip that printer sharing only worked via wireless, so dug out Airporter and set it up. As soon as I turned wireless on both mac's - the printers showed up. I was able to setup the HL-5240 and print to it. I was also able to use Guten-print cups driver for the HP and it worked.
Then I went and messed everything up and updated both systems to El Capitan and now I can't use shared printers. I have removed the printers from the iMac and the laptop - numerous reboots. When adding a printer on the iMac, if a serial printer that is found does not have a config, the system automatically creates a printer config. For the HL-5240 it is the right driver and shows online and ready. The HP uses the wrong driver (5PM - which I did try). If I delete it, while printer add tool open, it simply adds it back. I can manually add the HP with the correct driver and it shows up as ready to use. Then if I delete the one with the wrong driver, it gets deleted and as soon as do "add a printer" it's back with the wrong driver as another printer.
So, it worked using wireless before updating to El Capitan, and now it doesn't.
I still can't keep network totally secure because I have to use wireless to be able to see the shared printers. Not sure why shared printers don't work wired, but seems to be that way for a while. I would love to go back to just wired devices.
What else do you need to know?