From: Ravi (s_ravichandran@xxxxxxxxxxx)
Date: Sun Jul 01 2001 - 23:26:10 GMT-3
Fred,
My understanding was if there is any network mismatch in ospf speaking
routers, they still may become neighbors but not adjacent. But if they
establish adjacency, they will exchange LS updates. Please correct me if am
wrong.
Regards,
Ravi
----- Original Message -----
From: Fred Ingham <fningham@worldnet.att.net>
To: koliy T. <koliy@visto.com>
Cc: <ccielab@groupstudy.com>
Sent: Sunday, July 01, 2001 9:55 PM
Subject: Re: ospf over NBMA
> Koliy: You can have OSPF network mismatches where the adjacency is
> established but there will be no LSA transfers. Both point-to-point and
> point-to-multipoint use multicast for hellos but the point-to-multipoint
> network type uses unicast for LS updates and the point-to-point uses
> multicast for LS updates. Changing the hello timers will not fix this
> mismatch - you must have the OSPF network types match. Use debug to see
> where the transfer hangs. Do the obvious and change the spoke
> interfaces to point-to-multipoint, or leave all interfaces as the
> default non-broadcast network type. For the default situation you will
> want to have the hub as DR and use neighbor statements.
>
> HTH, Fred.
>
> "koliy T." wrote:
> >
> > It is a scenario of hub and spokes, and they are running ospf. The hub
has a frame-relay point-to-multipoint subinterface, and the spokers have
physical frame-relay interfaces.
> > The interface in the spokes have network type "point to point and the
hub subinterface has network type of point-to-multipoint" configured.
> > I dead change timers on the hub.
> > By the way on of the spoke establish the adjacency with the hub
router!!!!
> > I am using 3 routers and I am running 1 IOS version 12.0.17
> > Did anyone have this kind of problem?
> > bets Regards
> > Koliy
> >
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