From: Parthiban Devadass (parthiban.devadass@googlemail.com)
Date: Fri Jun 29 2007 - 02:57:50 ART
Hi,
I have an another question on this subject :-)
While Multicast packet travelling between the routers(PIM Enabled)
interface;Its destination MAC will be unicast(Router interface MAC) or Group
MAC(Multicast group mac address)
Rgds,
Parthiban
On 6/28/07, Douglas M Todd, Jr <dtodd@partners.org> wrote:
>
> Hi:
>
> R2 needs to do a lookup to know which interface to place the packet on.
> Thus the lookup happens before the rewrite on the L2 header (mac address
> as well as L2 technology). At this point it can then RW the L2 header to
> the correct framing for the interface.
>
> 1.1.1.1 is not a multicast address so it will just be unicast and follow
> the basics for unicast.
>
>
>
> Naresh Myaka wrote:
> > Hi GS,
> >
> > R1|F0/0------F0/1|R2|F0/0-----F0/0|R3|F0/1|1.1.1.1
> >
> > When R1 sends a unicast packets with destination address 1.1.1.1, and
> when
> > packet arrives on R2
> > before doing IP lookup does it checks for destionaton MAC address from
> > incoming packet.
> >
> > If it checks for the dest. MAC add. should it needs to match with MAC of
> > R2's incoming interface address.
> >
> > What if it is not match with incoming interface? as in multicast the
> Dest.
> > MAC address in incoming packet is Multicast
> > MAC address.
> >
> > Regards,
> > Naresh Myaka
> >
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