You may be confusing multi-point with broadcast.
Zhao Meng wrote:
> i am confused on communication type of ospf point-to-multipoint network
> packet .
>
> 2 descriptions from jeff dolye's routing tcp/ip vol1 are as follow:
>
> page417,2nd paragragh
> routers on these networks(point-to-multipoint networks) do not
> elect a dr and bdr , and because the networks are seen as
> point-to-point links, the ospf packets are multicast.
> ~~~~~~~~~~
> page451,4th paragragh
> on point-to-multipoint and virtual link networks,updates(link
> state update) are unicasted to the interface addresses of the
> ~~~~~~~~~
> adjacent neighbors.
>
> which one is correct? or both?
>
> thanks in advance.
>
> --
> Regards,
> Zhao Meng.
> CCNA,MCSE,MCP+I
>
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