From owner-freebsd-net  Tue Oct 24  7:59:40 2000
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Date: Tue, 24 Oct 2000 19:05:19 +0400
From: Kurakin Roman <rik@cronyx.ru>
Organization: Cronyx
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To: Jean-Christophe Varaillon <jcv@vbc.net>
Cc: freebsd-net@FreeBSD.ORG
Subject: Re: - sr Interface & Conf -
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Hi,

Jean-Christophe Varaillon wrote:
> 
> Hi Kurakin,
> 
> >       Which modification do you mean?
> > Are you going to use Sync PPP or Cisco HDLC protocol?
> > Any way if you are going to use if_sppp and don't want to use NETGRAPH,
> > I can send some useful patches for sppp.
> 
> I don't know if I am going to use Sync PPP or Cisco HDLC protocol.
> The thing is from "man sr" where it is precised that I have to add
> "pseudo-device  sppp"

Now FreeBSD supports two branches of sync drivers. First one old and
traditional sppp. Second one - NETGRAPH. (man netgraph)
As far as I know sr supports NETGRAPH.

> What are the purpose of the patches for sppp that you can send ?

Current state of sppp has incorrect behavior in some cases (ppp, cisco).
Those patches solve those problems and adds support of FrameRelay.
 
> > > I would like to connect a freeBSD box on a Cisco router.
> > >
> > >  To do it I did rebuilt a kernel with that:
> > >
> > >          pseudo-device  sppp
> > >          device         sr0  at pci? port 0x300 irq iomem 0xd0000
> > >
> > >  Then, when I  made dmseg 'sr0', it tells me that:
> > >          sr0 XXX: driver didn't set ifq_maxlen
> > >          sr1 XXX: driver didn't set ifq_maxlen
> > >
> > > >From a specialist called Kenjiro Cho:
> > >
> > > Starting from FreeBSD-4, drivers are supposed to set ifq_maxlen.
> > > The messages are just warnings but if you want to suppress the
> > > warning, add
> > >          ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
> > > in srattach() in sys/i386/isa/if_sr.c just before calling if_attach().
> 
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