Re: BGP multicast address family

BGP Mcast address family is used to exchange the IP address of MCAST Source
and it is advertised by BGP to all the neighbors. So u have the leanrt the
IP Address of the Source via BGP and install in ur RIB.
So its basically used to check for the RPF check for the incoming multicast
traffic with the particular source

I dont see an logic when u redistribute IGP into MPBGP Multicast AF.

On Fri, Aug 31, 2012 at 1:20 AM, Joe Astorino <joeastorino1982_at_gmail.com>wrote:

> That makes sense, as that is the purpose of multicast prefixes being
> carried by BGP (RPF check as you noted). As you noted, you can indeed
> redistribute from your IGP into MBGP multicast address-family but I
> don't believe there is anything for going back the other way
>
> On Thu, Aug 30, 2012 at 3:19 PM, Gilles Fabre <fabre.gilles_at_voila.fr>
> wrote:
> > I agree with you...
> > & on the other hand, you can redistribute an IGP into Multicast BGP, so
> it can
> > confuse
> >
> > My view is to consider Multicast BGP not as a routing protocol but
> rather as
> > an alternative solution to satisfy RPF check.
> >
> > Gilles.
> >
> >> Message du 30/08/12 C 18h40
> >> De : "Joe Astorino"
> >> A : "Vincent Tay"
> >> Copie C : "Ccielab_at_groupstudy.com"
> >> Objet : Re: BGP multicast address family
> >>
> >> I think you are talking about apples and oranges here Vince.
> >> Multicast routes are not handled by your IGP, they are handled by a
> >> multicast routing protocol such as PIM. Therefore, trying to
> >> redistribute multicast information into an IGP doesn't make any sense.
> >>
> >> On Thu, Aug 30, 2012 at 10:31 AM, Vincent Tay wrote:
> >> > Hi all,
> >> >
> >> > Is it normal that BGP multicast address family routes cannot be
> >> > redistributed into IGP.
> >> >
> >> > Thanks
> >> >
> >> >
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> >> --
> >> Regards,
> >>
> >> Joe Astorino
> >> CCIE #24347
> >> http://astorinonetworks.com
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>
> Joe Astorino
> CCIE #24347
> http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan
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