[rescue] bootp and dhcp - conflict?

[David Brownlee]

On Wed, 18 May 2022 at 06:17, Dan Moisa <dmoisa at gmail.com> wrote:
>
> The conclusion here is that the 3/80 is just slow. It works fine with
> SunOS 4.1.1, though for that I gave up on the instructions for how to
> set up netboot from the installation files, and just installed to
> harddrive and copied the directory structure/etc out of it. Nothing
> complex worked otherwise - X, patches, the upgrade.

There are still active NetBSD/x68k and mac68k users, so while slow the
3/80 should still be usable (for some early 1990s definition :)

> The main problem right now is that NFS gets dropped after roughly half
> an hour. Anyone know what kind of keepalive is needed here? I'm
> looking for something that basically keeps the connections open
> indefinitely.

Could you get a packet trace and/or try switching between TCP & UDP.
Are you able to reproduce for a non root NFS partition (so you have
access to all the local utils to tcpdump etc)

> Thank you all for your knowledge and patience on this!
>
> PS: for NetBSD, on Sun4 and onwards it looks like boot.net tries BOOTP
> (dhcp) first, which on modern stuff gives you nothing. It's relatively
> easy to change the code to move bootparams first, which makes
> everything work like butter on an unsegmented network.

I remember the mid 1990s when the NetBSD defaults were switched to
BOOTP/DHCP first to give a more consistent default across platforms.

I think it would be reasonable to have a runtime switch - possibly
either by building two separate netboot binaries, or with some form of
command line switch (I think patches would always be welcome :-p )

David (jealous over the 3/80 :)