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From: coolidge@speaker.sgi.com (Don Coolidge)
Newsgroups: comp.sys.hp
Subject: Re: Switching from Sun to HP: some general questions
Summary: ARP or arp?
Keywords: ARP, probe, arp
Message-ID: <1991May15.205916.26402@odin.corp.sgi.com>
Date: 15 May 91 20:59:16 GMT
References: <JJC.91Apr8133840@jclark.UUCP} <1730085@hpcndjdz.CND.HP.COM} <5351@network.ucsd.edu>
Sender: news@odin.corp.sgi.com (Net News)
Reply-To: coolidge@speaker.UUCP (Don Coolidge)
Organization: Silicon Graphics Inc., Mtn. View, CA
Lines: 45

In article <5351@network.ucsd.edu> corrigan@weber.ucsd.edu (Michael J. Corrigan) writes:
>In article <1730085@hpcndjdz.CND.HP.COM} jason@hpcndjdz.CND.HP.COM (Jason Zions) writes:
>....
>}
>}Networking in the 8.0 releases of HP-UX (including the 700s) is based on the
>}BSD4.3 source. In the past, the kernel portions of networking were 4.2 based
>}with user-space commands somewhere in the continuum of patched-4.2 through
>}patched-post-4.3. All commands are now 4.3 or better.
>
>	Is arp replacing probe ? (i.e. can bootpd be ported simply)
>
>}Jason Zions

(Hi, Jason!)

Movie dialogue:

"...and why did you come to Casablanca, Monsieur Rick?"
"I came for the waters."
"But there are no waters here!"
"I was misinformed."

ARP is not replacing Probe for the simple reason that ARP has always 
been there. ARP and Probe have shared an address-resolution cache since
HP-UX 1.0 on the s800, and at least since 6.0 on the s300. ARPs and 
Probe VNAs have both been sent and received, so your question rests
on a misunderstanding. (They coexisted to permit both Ethernet and 
IEEE 802.3 address resolution. In 8.0, parts of that relationship are
redefined to focus primarily on ARP, but it still works concurrently
with Probe.)

If, however, you mean "...is the BSD arp command supported in 8.0?",
the answer is probably "yes" - at least, it was included when I left HP.
As Jason says, 8.0 networking is 4.3BSDish, and the arp command is part
of that. It wasn't included in HP's 4.2ish (pre-8.0) port, though - and
anyone who attempted to compile and use it would find that there was no
such thing as "arptab" to examine and/or modify (and, no, I'm not about
to give the pre-8.0 shared cache name. Get it from your HP rep if you want
to play with it, but be aware that there are *no* guarantees you won't
crash the system by doing so, since the only way to write to it is by writing
directly to the kernel; there's no ioctl support for doing that with
spl() protection...).

- Don Coolidge
coolidge@speaker.wpd.sgi.com