I use a lot of network printers and usually it just works.
This time, the New Printer didn't know about the printer, so I had to go to the brother site, Download Drivers For MFC-8890DW
I downloaded both the LPR and the cupswrapper drivers as rpms and clicked to allow the default application to install them.
Then, I went to the start menu/System Settings/Hardware/Printer Configuration.
This was the only annoying part. It wanted the root password instead of using sudo and hence my password.
Then I clicked on New Printer, it found the network printer, I selected it, and clicked forward, then just followed the steps to the end.
Couldn't have been easier. After then, when printing from an application, it just showns up.
As part of the set up I could have clicked on Make Printer The Default but didn't. I use a lot of printers different places.