All things related to multicast

[Joel Jaeggli <>]

On Wed, 9 Jul 2003, Lorenzo Vicisano wrote:
> 
> because you, the host, would have to have routing information to find
> out who the 1st hop towards the source is...

Do situations exist where a host that isn't running an igp or egp has 
multiple first hop routers available on the interface that it's default 
route is pointing out (excluding the special case of hsrp)?

> you would also have to
> take part to the PIM routing protocol to find out who's responsible to
> forward in your lan for that source.

yes

>       Lorenzo
> 
> >  
> > >   Lorenzo
> > > 
> > > > 
> > > > 
> > > > On Wed, 9 Jul 2003, David Meyer wrote:
> > > > 
> > > > > 
> > > > >       I guess the more things change, the more they stay the
> > > > >       same. 
> > > > > 
> > > > >       So another thing occurred to me while reading the
> > > > >       Multicast Last-Mile Solutions drafts on Greg's site: Why
> > > > >       are we defining yet another ad-hoc signaling protocol
> > > > >       (that is one way to looks at these proposals)? The IETF
> > > > >       literature is littered with signaling proposals, some
> > > > >       host-based, some router-based, at varying degrees of
> > > > >       generality. 
> > > > > 
> > > > >       Straw person: why not have the host send a PATH message
> > > > >       towards the source (since it knows the source) and have
> > > > >       the first multicast capable router in the path send back
> > > > >       the its tunnel endpoint, have the host set up GRE (or
> > > > >       user space encap) to that router and ...
> > > > > 
> > > > >       What I am suggesting is we really don't have a general
> > > > >       purpose host-to-router signaling protocol (well,
> > > > >       maybe). So if we pick one of the current drafts (or a
> > > > >       hybrid, or even new), will we have to build a new
> > > > >       signaling infrastructure for the next feature not
> > > > >       supported by the directly connected routers? 
> > > > > 
> > > > >       Seems like we should be able to answer this question in a
> > > > >       more general way than is done in these drafts.
> > > > > 
> > > > >       Dave
> > > > > _______________________________________________
> > > > > Mtp mailing list
> > > > > 
> > > > > http://www.shepfarm.com/mailman/listinfo/mtp
> > > > > 
> > > > 
> > > > -- 
> > > > --------------------------------------------------------------------------
> > > >  
> > > > Joel Jaeggli          Academic User Services   
> > > > 
> > > >     
> > > > --    PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E    
> > > >   --
> > > >   In Dr. Johnson's famous dictionary patriotism is defined as the last
> > > >   resort of the scoundrel.  With all due respect to an enlightened but
> > > >   inferior lexicographer I beg to submit that it is the first.
> > > >                             -- Ambrose Bierce, "The Devil's 
> > > > Dictionary"
> > > > 
> > > 
> > 
> > -- 
> > --------------------------------------------------------------------------
> >  
> > Joel Jaeggli              Academic User Services   
> > 
> >     
> > --    PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E      --
> >   In Dr. Johnson's famous dictionary patriotism is defined as the last
> >   resort of the scoundrel.  With all due respect to an enlightened but
> >   inferior lexicographer I beg to submit that it is the first.
> >                         -- Ambrose Bierce, "The Devil's Dictionary"
> > 
> 

-- 
-------------------------------------------------------------------------- 
Joel Jaeggli          Academic User Services   

    
--    PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E      --
  In Dr. Johnson's famous dictionary patriotism is defined as the last
  resort of the scoundrel.  With all due respect to an enlightened but
  inferior lexicographer I beg to submit that it is the first.
                            -- Ambrose Bierce, "The Devil's Dictionary"