🚀 go-pugleaf

In article <3k1c5r$inj@doc.armltd.co.uk>,
          Clive.Jones@armltd.co.uk (you) wrote:

> In article <3k06ab$qsr@lyra.csx.cam.ac.uk> fanf2@thor.cam.ac.uk (Tony Finch) writes:
> >In article <3jval2$26d@doc.armltd.co.uk>,  <Clive.Jones@armltd.co.uk> wrote:
> >> 
> >> The structure would be:
> >> 
> >>   ---+-------+-------+-------+-------+---
> >>      |       |       |       |       |
> >>                   [Addr A]
> >>                 ACORN TCP/IP
> >>                   [Addr B]
> >>                      |
> >>                   [Addr C]
> >>                    !TCPIP
> >
> >Can't A and B be the same?
> 
> I don't believe that's permitted by the IP standards. In practice,
> nobody in the outside world would notice, I imagine.
> 
> However, also in practice, I expect Unix would barf if you tried to
> configure two of its interfaces to have the same IP address. Since
> Acorn's TCP/IP suite is derived from the BSD one, it would probably
> also object.
> 
> However, please don't take this as an authoritative answer - I've
> never actually tried giving two interfaces the same address!
> 
> --Clive.
>                (Disclaimer: I wouldn't believe a word of this if I were you...)

I think I'll stick with Clive's disclaimer, but....

Whilst as far as I can see A and B must be different, the B and C addresses
(either side of AUNLink) are working quite happily as the same address on
my setup (which is...)

Demon---(SLIP)---158.152.75.99 KA9Q port ax0

10.0.0.1 Acorn port ka0---(AUNLink)---10.0.0.1 KA9Q port ka0

10.0.0.2 Acorn port eb0---ethernet to my disused A5000

I do find it irritating that Access messages get chucked down every port,
and I can't stop them from reaching KA9Q.  Moreover, they are picked up
as valid packets by KA9Q under some circumstances - I telnetted to KA9Q from
Acorn and hence went into the chat thingy, and every now and then I'd get
a broadcast to do with the remote printers come up in the window.  Talking
of which, has Acorn or ANT or anyone published the protocols used by Access
yet?

-- 
preferred email address is dsmcf@sc3d.demon.co.uk unless otherwise specified
web home page URL is http://www.ee.ic.ac.uk/hp/students/ee3/dsm/main.html
... Doing my part to preserve order in the universe