From: Douglas M Todd, Jr (dtodd@PARTNERS.ORG)
Date: Thu Jun 28 2007 - 11:43:20 ART
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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