Brother MFC-822 Network User's Manual page 118

Unix/Linux Systems
Typically, Unix systems require the colon ":" character between
each digit of the Ethernet address.
arp -s 192.189.207.2 00:80:77:31:01:07
You must be on the same Ethernet segment (that is, there cannot
be a router between the Print/Fax server and operating system) to
use the arp -s command.
If there is a router, you may use BOOTP or other methods
described in this chapter to enter the IP address.
If your Administrator has configured the system to deliver IP
addresses using BOOTP, DHCP or RARP your Brother Print/Fax
server can receive an IP address from any one of these IP
address allocation systems. In which case, you will not need to
use the ARP command. The ARP command only works once. For
security reasons, once you have successfully configured the IP
address of a Brother Print/Fax server using the ARP command,
you cannot use the ARP command again to change the address.
The Print/Fax server will ignore any attempts to do this. If you wish
to change the IP address again, use a Web Browser, the
machine's control panel or factory reset the Print/Fax server
(which will then allow you to use the ARP command again).
To configure the Print/Fax server and to verify the connection,
enter the following command ping ipaddress where
ipaddress is the IP address of the Print/Fax server. For
example, ping 192.189.207.2.
TCP/IP CONFIGURATION 11 - 7