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To: "David Langford" <root@dihelix.com>,
        "David Langford" <langfod@dihelix.com>
cc: multimedia@freebsd.org
Subject: Re: mrouted blues 
In-reply-to: Your message of "Thu, 14 Mar 1996 18:58:23 -1000."
             <199603150458.SAA02185@caliban.dihelix.com> 
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Date: Thu, 14 Mar 1996 21:11:17 -0800
From: "Amancio Hasty Jr." <hasty@rah.star-gate.com>
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Well, if PPP can't handle ip multicast I suggest that we request
the OS group to support ip multicast on our PPP interface.


>From if_ppp.c:

pppattach()
{
    register struct ppp_softc *sc;
    register int i = 0;

    linesw[PPPDISC] = pppdisc;

    for (sc = ppp_softc; i < NPPP; sc++) {
        sc->sc_if.if_name = "ppp";
        sc->sc_if.if_unit = i++;
        sc->sc_if.if_mtu = PPP_MTU;
        sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;

                                                ^^^^^^^^^


Now if the ip multicast does not work with PPP then I suggest either debugging
the problem or post the problem  on the -hackers list.

	Regards,
	Amancio



	Cheers,
	Amancio

>>> "David Langford" said:,
>>> "David Langford" said:
 > As I said though, I am going over a PPP link. Since multicast
 > doesnt go over PPP I need a tunnel. If you can come up with
 > another solution I am all hears.
 > 
 > >If you are on the same subnet you don't need mrouted.
 > >
 > >	Amancio
 > >
 > >>>> "David Langford" said:,
 > >>>> "David Langford" said:
 > > > 
 > > > I am trying to do a multicast tunnel through a PPP link using
 > > > mrouted on an SGI on one end and FreeBSD on the other.
 > > > 
 > > > The problem is that mrouted in its infinite wisdom wont let me
 > > > set up a tunnel to a machine that it thinks is on the same subnet.
 > > > It tells me it in unnecassary and then bombs when it discovers that
 > > > there are no more interfaces it can use.
 > > > 
 > > > Is there any way to thwart this?
 > > > 
 > > > Thanks. 
 > > > 
 > > > David Langford
 > > > langfod@dihelix.com
 > > > 
 > >
 > >
 >