Here's what happens:  tftp times out, and nothing boots.

tcpdump -vv udp sez:
19:59:23.086974 4xdev.1224 > 255.255.255.255.tftp: 22 RRQ "C0815418.SUN4" (ttl 255, id 0)
19:59:23.241599 taniemarie.1063 > 4xdev.1224: udp 21 (ttl 64, id 5874)

This is "correct" - the Sun 4 is getting the hardware address 192.129.84.24,
and is requesting a file which exists, is in /tftpboot, and is world readable.
I have
tftp            dgram   udp     wait    nobody  /usr/libexec/tftpd      tftpd /tftpboot
in /etc/inetd.conf.

This *looks* right.

I disabled tftpd's attempts to setgid/uid to "nobody", because it was failing
with permission denied to change gid.  (I don't care much for now.)

?

-s