Brother HL-8050N - If you are unable to fix the problem

TCP/IP CONFIGURATION 10 - 8
Using RARP to Configure the IP Address
The Brother print server’s IP address can be configured using the
Reverse ARP (rarp) facility on your host computer. This is done by
editing the /etc/ethers file (if this file does not exist, you can
create it) with an entry similar to the following:
00:80:77:31:01:07 BRN_310107
Where the first entry is the Ethernet address of the print server and
the second entry is the name of the print server (the name must be
the same as the one you put in the /etc/hosts file).
If the rarp daemon is not already running, start it (depending on the
system the command can be rarpd, rarpd -a, in.rarpd -a
or something else; type man rarpd or refer to your system
documentation for additional information). To verify that the rarp
daemon is running on a Berkeley UNIX-based system, type the
following command:
ps -ax | grep -v grep | grep rarpd
For AT&T UNIX-based systems, type:
ps -ef | grep -v grep | grep rarpd
The Brother print server will get the IP address from the rarp daemon
when the printer is powered on.