Re: Elementary Problem!

[Erblichs <[e-mail]>]

Rohit,

        If you want a short answer here it is.

        If these two routers are the only ones
        on this broadcast networks, then they
        wait until the Wait timer expires to
        see if anyone annouces a DR and/or
        BDR.

        During that time we will form neighbors
        between these new routers if a number of
        parameters are consistent.

        Each router will then do the appropriate
        DR/BDR election.

        Mitchell Erblich
        Sr Software Engineer
        -------------------------


Rohit Gupta wrote:
>
> What happens when two OSPF speaking routers are
> simultaneously switched on a broadcast network? Both
> of them will put the DR and the BDR as Zero in their
> HELLO packets.
>
> They will both start with Neighbor Down state and
> Interface down state. Once the Interface will come up
> both will go to Waiting state. Now when they recieve
> the HELLO message listiing each other they will reach
> the 2-Way state.
>
> What happens after that is not clear to me from the
> RFC. How does the DR and BDR get elected? DO we wait
> for the Wait timer to get expired?
>
> The scenario is clear to me when one of them has
> already elected a DR and a BDR. What is not clear to
> me is when none of them have elected a DR and BDR.
>
> Please help!
>
> Regards,
> Rohit
>
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