Re: Waiting State Question

[Mukul Goyal <[e-mail]>]

I think the NeighborChange events are ignored while an interface is in waiting
state.

Thanks,
Mukul


Quoting Kishore Rao <[e-mail]>:

> The question was not about how DR or BDRs are elected. John's question was
> if the router should exit Wait Timer (and run DR election) on receving Hello
> from a router declaring itself as DR. Well, from section 10.5 it should.
>
> Kishore
>
>
> > My guess is that if an interface comes out of the waiting state on
> receiving a
> > Hello from DR (without having received a Hello from BDR), it may elect
> itself
> > as BDR. This way many routers may elect themselves as BDR. Now all these
> BDR
> > claimants (except one) will ultimately take their claims to BDRship back
> but in
> > the process each router on the LAN may have to do several DR elections.
> >
> > Here is a paper we wrote recently that may shed further light on this:
> > http://cs.uwm.edu/~mukul/ospflan.pdf
> >
> > Thanks,
> > Mukul
> >
> > Quoting John Smith <[e-mail]>:
> >
> > > 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?
> > >
> > > Thanks,
> > > John
> > >
> > > Send instant messages to your online friends
> http://uk.messenger.yahoo.com
> > >
>