Re: RPF Query!!!!!!!!!!

No marko can u be little more clear
wat is ur scenario deals wid RPF

On Thu, Nov 18, 2010 at 7:47 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> A---B
> | X |
> C---D
>
> So, we have full mesh of connections between A, B, C and D. Source is
> attached to A. Source sends packet, A replicates it to B, C and D. C
> replicates the packet to B and D (B and D receive their 2nd copy of
> the same traffic). When B receives this traffic for C it replicates it
> to D (3rd copy), and back to A. A replicates it back to C, D... etc
> etc etc. You get the idea?
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
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> On Thu, Nov 18, 2010 at 14:10, CCIE KID <eliteccie_at_gmail.com> wrote:
> > Hey i know the RPF check happens every time when a multicast packet comes
> to
> > router to check whether the same interface can be used to reach the
> source
> > of the multicast feed.Why does this has been done?? To avoid loops!!!!
> *WHy
> > RPF check is mandatory for a multicast packet*?
> > If to avoid loops Can u give me a classic case of loop formation in
> > multicasting when RPF is not present
> >
> >
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With Warmest Regards,
CCIE KID
IN PURSUIT OF CCIE
Blogs and organic groups at http://www.ccie.net