Two things.

--Just so you know.  (I haven't looked thru the messages yet and
someone might have answered this)  The RBootD MUST and NEEDS to be
running.  The INITAL boot query packet DOES NOT show up on TCP dumps
because it IS NOT a TCP packet.  It is a SPECIAL HP-RBOOT packet.

After running the RBootD program you will have a selection of boot
programs one of which is: SYSUBOOT.

Not TILL NetBSD starts the Net part of the Kernel Boot will TCP be
active (And NOT TILL THEN).

--The 400 Series Serial port is a Physical port that has MUTIPLE ports
in it.  (Please check the FAQ's in the HP300 Port area of NetBSD's
site.

Again, YOU MUST RUN RBOOTD OR IT WILL NOT ATTEMPT TO BOOT.

Check out ALL the papers in the HP300 Port area of NetBSD to Freshen up
on things.  There is a LOT of info there: 	www.NetBSD.org/Ports/hp300
	Archives, FAQ's on Video (THAT WORK), 400 Series Serial Ports (And
their Dongles), Etc.

-David