From: Adhu Ajit (adhu_ajit@yahoo.com)
Date: Tue Oct 31 2006 - 21:41:58 ART
Alexei, point to multipoint does not require neighbor statements. However, "point to multipoint non-broadcast" (which is one of the 3 Cisco defines modes) requires neighbor statements. But it does not form DR/BDR relationships, like you have pointed out. That's the reason I'm totally confused.
(This mode and its details are qouted in the Cisco BSCI 2.0 course material)
Adhu.
Alexei Monastyrnyi <alexeim@orcsoftware.com> wrote:
In a nutshell, it gives you no DR-BDR relationships with unicast LSA
flooding etc (since non-broadcast will require to have a neighbor on one
side. Normal p2mp would utilize AllOSPFrouters multicast group for both
hellos and LSA flooding. If I remember right...
A.
Adhu Ajit wrote:
> Folks, I went through different books on this one but I still cant understand on when I should use this mode over the other modes such as:
>
> NBMA (and or)
> Point to Multipoint
>
> Can someone explain ?
>
> Thanks,
> Sai.
>
>
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