From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Wed Apr 19 2006 - 13:47:31 GMT-3
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
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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
> >
> >
This archive was generated by hypermail 2.1.4 : Mon May 01 2006 - 11:41:58 GMT-3