From: hulbertj@comcast.net
Date: Mon Jul 18 2005 - 23:24:51 GMT-3
Lee,
The "non-broadcast" option added to ospf network point-to-multipoint will not send ospf hellos as multicast (224.0.0.5), but as unicast hellos. (static neighbor statement). You still do not have a DR/BDR election, so setting the priority should not be needed.
Try labbing up all OSPF network types (broadcast/non-broadcast/loopback/p-t-p/p-t-m and p-t-m nonbroadcast) and see how it works, especially going over different layer 2 mediums (p-t-p, ethernet, nbma atm, frame, etc).
For Mohit's second question, depending on the layer 2 topology, and other requirements (DR/BDR, etc?) Non-broadcast w/ static neighbor statements or Point-to-multipoint non-broadcast w/ static neighbor statements.
Jerry
-------------- Original message --------------
> hi,
> I have the same question, could anyone gives us an explanation ?
>
> Thanks
>
> Lee.
>
> ----- Original Message -----
> From: "Sharma, Mohit"
> To:
> Sent: Sunday, June 20, 2004 10:36 PM
> Subject: Ospf network types
>
>
> > HI All,
> >
> > Could somebody please explain the difference between using ospf network
> > type point-to-multipoint and point-to-multipoint nonbroadcast.
> >
> > The only difference I could read on the doc cd's was that with the added
> > nonbroadcast option you can use neighbor statement and assign costs to
> > the neighbor spokes to distinguish between more or less preferred links.
> >
> > But I did the same thing with just using the p2m option without using
> > nonbroadcast and was able to assign the cost to the spokes.
> > Then why do we need the nonbroadcast????
> >
> > Also another question-IF ospf should send ONLY unicast messages to the
> > neighbor, then the only option would be to use nbma with neighbor
> > command or is there any other option available which is send unicast??
> >
> > Thanx,
> > Mohit.
> >
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