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Date:      Sat, 8 Dec 2001 23:44:47 +0100
From:      Joerg Wunsch <j@uriah.heep.sax.de>
To:        freebsd-current@FreeBSD.ORG
Cc:        Ruslan Ermilov <ru@FreeBSD.ORG>
Subject:   Re: rev 1.61 of /sys/netinet/in.c breaks ISDN
Message-ID:  <20011208234447.E97235@uriah.heep.sax.de>
In-Reply-To: <20011208165113.G32556@sunbay.com>; from ru@FreeBSD.ORG on Sat, Dec 08, 2001 at 04:51:13PM %2B0200
References:  <Alexander@leidinger.net> <200112061126.fB6BQ5v00774@Magelan.Leidinger.net> <200112061352.fB6DqnE47522@hak.lan.Awfulhak.org> <20011206162840.C82299@sunbay.com> <200112062023.fB6KNWd65603@uriah.heep.sax.de> <20011207095553.D13705@sunbay.com> <20011207210112.A97235@uriah.heep.sax.de> <20011208165113.G32556@sunbay.com>

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As Ruslan Ermilov wrote:

> > You need to configure /some/ interface address for the remote end
> > anyway, and it must not clash with any other routing table entry,
> > since "ifconfig ... up" always adds an entry for the remote IP address
> > for p2p interfaces.

> Only if you have INET address configured on an interface.

That's the purpose of an sppp interface.  You can't do anything with
it unless an INET address has been configured to it.  (In the case of
an automatic dialer -- which is what many ISDN users are using -- you
need the IP traffic generated by normal routing in order to trigger
the ISDN dialout.)

> Why not just bring the interface up first, then negotiate an address,
> then add it to interface?

Because it'll become a chicken-and-egg problem: the interface would
never start negotiating PPP in that case.

There are other PPP implementations available for people who want a
full-blown one; sppp is meant to be the simplest (and smallest) PPP
implementation that is useful for synchronous data carriers.

> [Please DO NOT exclude my personal address when replying -- I didn't
> ask for it (as many do) through the Mail-Followup-To: header.]

You got it.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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