http://sidneys77crlfslcr7zmj3msmxchgnxhrxlp3p3kbaswo7twchjnicid.onion/retrocomputing/2024/10/04/booting-sun-sparc-servers.html
Instead of DHCP, Solaris uses RARP ,
an older protocol (1984; DHCP was first defined in 1993). Now, ARP is a link-layer protocol that allows
internet-layer addresses (IPs) to be resolved to link-layer addresses (MACs). Reverse ARP is used to resolve a MAC to
an IP.