Re: Waiting State Question

[Anthony Baire <[e-mail]>]

On Jeu 19 mai 2005 14:20, John Smith a écrit :
> Hi,
>
> When a router comes up it starts the Wait Timer before it elects the
> DR/BDR. It either
> waits for the Wait Timer to expire or it waits for a router declaring
> itself as the BDR
> before it decides that it needs to get out of the 'Waiting' state (it does
> this by
> generating the Backupseen event).
>
> My question is why does it wait only for the BDR? Why not the DR? It can
> when it recieves
> a HELLO from the DR know that their exists a DR and a BDR. Why not then
> get out of the
> 'Waiting' state?


Hi John,

this is not the exact definition of event BackupSeen. The event is
generated when the router detects the existence or non-existence of a
backup designated router. This can be done by receiving a Hello packet
from a DR claiming that there is no BDR on the network.


Anthony