The MAC address can be located on a sticker underneath the unit. Here are the steps for RARP configuration.
Make a note of the hardware or MAC address located on the sticker underneath the PortServer unit.
Edit /etc/ethers on your UNIX server add an entry similar to the following placing the MAC address first, followed by the IP address you wish to assign:
Next edit /etc/hosts file, add the IP address and any applicable host name.
From the UNIX root prompt type:
# rarpd -a
Reboot the PortServer unit.
You should now be able to telnet to the unit using the IP address just assigned.