From: Mohammed Shameen Abdul Jabbar (ccie.xpert@gmail.com)
Date: Wed Apr 19 2006 - 14:10:59 GMT-3
Brian,
Thanks for your Input. I am referring to the IEWB scenario VER3.0, Lab 2,
Multicast task.
As per the requirements of the lab everything is working. But I have enabled
sparse-mode on the S0/0 interface of BB1 just for testing purpose , so that
I can understand the concepts of Multicasting thoroughly. All the Routers
have unicast reachability to 54.1.2.245 ip of BB1 and All the routers do
know that R2 is the RP for the domain.
I will post the configuration R2,R6 and BB1 as soon as i get back to my lab.
Chris, I will try out the options you provided as well.
regards
shamin
On 4/19/06, Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
>
> This would not be the case since R6 has the (S,G) entry already
> installed. Looking just at the mrouting table of R6 my first guess
> would be that R6 isn't registering with the RP for that group. Also
> BB1's multicast configuration doesn't matter because it is a multicast
> source in this case, not a multicast router. Look at the "show ip pim
> rp mapping" output on all the pim routers. Do they know that R2 is the
> RP? Is the RPF check successful for traffic coming from and going to
> the RP? Do the rest of the multicast routers have a unicast route back
> to BB1? Paste the "show ip route" "show ip mroute" "show ip rp mapping"
> for all routers participating in multicast routing.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Chris Lewis
> > Sent: Wednesday, April 19, 2006 8:09 AM
> > To: Vikram Dadlaney
> > Cc: ccielab@groupstudy.com; ccie.xpert@gmail.com
> > Subject: Re: Multicast problems
> >
> > It looks like you are using the physical interfaces for teh frame
> relay
> > connection between BB1 and R6. If so, I would have expected to see
> frame
> > relay map statements in those interfaces.
> >
> > You won't get multicast connectivity until unicast is working!
> >
> > Chris
> >
> >
> > On 4/19/06, Vikram Dadlaney <vdadlaney@gmail.com> wrote:
> > >
> > > Hi Shameen,
> > >
> > > From your topology it doesn't seem like you have any alternate
> paths.
> > Can
> > > you confirm this? Your OIL list on R6 is empty hence you are not
> > > forwarding
> > > the multicast traffic. Can you post the the configs of R2. Also have
> you
> > > tried clearing all your neighbors. The 'ip mroute' influences the
> RPF
> > > check.
> > > If you have multicast enabled on all interfaces than it should not
> > matter
> > > but say you have an alternate path and you haven't enabled multicast
> on
> > > that
> > > but the unicast routing table is choosing that path than you will
> have a
> > > RPF
> > > failure. Please do let us know if the problem has been resolved.
> HTH.
> > >
> > > Regards,
> > >
> > > Vikram
> > >
> > >
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