Re: Regarding Multicasting

From: masroor ali <masror.ali_at_gmail.com>
Date: Sun, 13 Jun 2010 11:49:05 +0500

hi,
could you please upload the running configuration of routers, that may help
us to identify the problem,

On Sun, Jun 13, 2010 at 4:55 AM, Andrey Tarasov <andyvt_at_gmail.com> wrote:

> I think you have to check RPF on R4. FE link is probably what is
> causing RPF failure.
>
> On Sat, Jun 12, 2010 at 4:33 PM, Raghav Bhargava
> <raghavbhargava12_at_gmail.com> wrote:
> > Hi Experts,
> >
> > Below is the output of one my router in Lab:
> >
> > R4#show ip pim interface count | b Address
> > Address Interface FS Mpackets In/Out
> > 10.1.34.4 Serial0/0.43 * 68/0
> > 10.1.45.4 Serial0/1 * 0/0
> > 4.4.4.4 Loopback0 * 0/0
> >
> > ***************************
> >
> > (2.2.2.2, 224.1.1.1), 00:01:33/00:01:26, flags: L
> > Incoming interface: Null, RPF nbr 10.1.100.3
> > Outgoing interface list:
> > Serial0/0.43, Forward/Dense, 00:01:35/00:00:00
> > Serial0/1, Forward/Dense, 00:01:35/00:00:00
> > Loopback0, Forward/Dense, 00:01:35/00:00:00
> >
> > The topology is:
> > _____ fe link___
> > | |
> > R2------R1- serial---R3--serial link----R4---- serial--R5------R6
> >
> > My source is R2 and all the other routers join the group 224.1.1.1
> >
> > Now the problem is that R4 is receiving the mcast packets from
> 101.34.3(R3)
> > but it is not forwarding them out via serial0/1 to R5. Although in the
> > mroute table i can see the outgoing interface. I have checked the
> > configuration's and they look good to me. I am not able to identify what
> is
> > prompting R4 not to send the mcast packets out via serial 0/1.
> >
> > I have checked the RPF for the source i.e R2 on R5 and my RPF is good.
> Did
> > mtrace also and that also looks good.
> >
> > Please advise.
> >
> > --
> > Warm Regards
> > Raghav
> >
> >
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-- 
Regards,
Masroor Ali
Blogs and organic groups at http://www.ccie.net
Received on Sun Jun 13 2010 - 11:49:05 ART

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