Re: Multicast issue in NBMA

Thanks Tony for yor reply.

Yes,I have used the "ip pim nbma-mode" command but the hub isn't even
receiving the join messages (before the split horizon even comes into play)
to begin with.
Also,the SPT tree works just as expected,the problem is with the build up
of the shared tree from the receiver uo to the RP.

Maybe I should mention that I'm doing this on GNS..Don't know if this might
be a GNS issue.

On Thu, Jul 4, 2013 at 6:56 PM, Tony Singh <mothafungla_at_gmail.com> wrote:

> Have you enabled "ip pim nbma-mode" on the hub? I'd imagine we need to get
> past the split-horizon like behaviour in order to register with the RP, the
> RP will then be cut out of the path due to SPT optimisation depending on
> where you issue the pings from... another alternative is to create a GRE
> tunnel between source and RP to make them think their connected directly.
>
> --
> BR
>
> Tony
>
> Sent from my iPhone on 3
>
> On 4 Jul 2013, at 18:43, Taio Bone <taiobtnh_at_gmail.com> wrote:
>
> > Hello expert. I'm having a challenge with a certain scenario. Say we
> have 3
> > routers(R1,R2 and R3) with R1 as the hub (in a frame relay network with
> > ospf network type "BROADCAST") while R2 and R3 are spoke routers.
> >
> > All interfaces are in sparse mode. Now,I have a host behind R2 trying to
> > join a multicast group whose RP is on the loopback(3.3.3.3/32) of the
> other
> > spoke router,R3.
> >
> > Now,the issue I'm encountering is that R2 gets the join message and has
> an
> > entry for (*,G) but R1 isn't getting the join message neither does it
> have
> > an entry for (*,G).
> >
> > You assume all the routers are connected to the FRS using their Serial1/0
> > with IP addresses 10.10.10.(1,2,3) for R1,R2 and R3 respectively.
> >
> > What I'm assuming might be the problem is that fact that the next hop and
> > RPF neighbor indicated on R2 for the RP address is 10.10.10.3..Now this
> is
> > expected since it's an OSPF "broadcast" network type and they are all in
> > the same broadcast domain.
> >
> > P.S Each spoke router has a frame-relay map statements to both the hub
> and
> > the spoke routers.
> >
> > Thank you.
> >
> >
> >
> >
> > --
> > Warm wishes,
> >
> > Ty.
> >
> >
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> >
>

-- 
Warm wishes,
Ty.
Blogs and organic groups at http://www.ccie.net