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

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
FREE CCIE training: http://bit.ly/vLecture
Mailto: markom_at_ipexpert.com
Telephone: +1.810.326.1444
Web: http://www.ipexpert.com/
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
>
>
> --
> With Warmest Regards,
>
> CCIE KID
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