From: OhioHondo (ohiohondo@columbus.rr.com)
Date: Tue Dec 10 2002 - 16:47:11 GMT-3
Only R3 has interfaces in the OSPF backbone area. In an OSPF AS all areas
have to be connected to the OSPF backbone area either by a virtual link or
by having an ABR. (an ABR having the presence of the backbone area in it.)
Tunnels could be used to establish ABR's for the different OSPF areas cited
however the tunnel interface in each router would probably have to be in
OSPF area 0. -- OR the areas of each router can be brought to R3 via tunnels
and then R3 would serve as the ABR for all areas.
It might be more practical to put the frame relay interface between the
routers in OSPF area 0. Adding the tunnels would then be unnecessary. Since
there is only one possible transport link on R5 (e0/0) this interface should
also be defined to area 0.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Peter van Oene
Sent: Tuesday, December 10, 2002 8:10 AM
To: ccielab@groupstudy.com
Subject: RE: Ospf stub and NSSA problem
At 10:38 PM 12/9/2002 -0500, Jake Jake wrote:
>L0 L1 and L2 are in area 0 as she stated "R3 (interfaces L0, L1, & L2 are
>area 0), e0/0 is area 3" below. I believe you will need to create a tunnel
>to get this to work since nssa area doesnt allow virtual link.
Ahhh! 5 times I read that and missed it each time :)
>Thoughts?
>Jake.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Peter van Oene
>Sent: Monday, December 09, 2002 10:09 PM
>To: Debbie Westall
>Cc: ccielab@groupstudy.com
>Subject: Re: Ospf stub and NSSA problem
>
>
> > > >* There is frame-relay, fully meshed between R1, R2 & R3., R5 is
>connected
> > > > via ethernet.
> > > >* R1 (all interfaces), area 1
> > > >* R2 (loopback2, s0/0.1and s0/0.2) - area 1
> > > >* R3 (s0/0.1 & s0/0.2) are in OSPF area 1
> > > >* Area 1 is an NSSA.
> > > >* R3 (interfaces L0, L1, & L2 are area 0), e0/0 is area 3.
> > > >* R5 (Interfaces e0/0, L0) area Area 2.
> > > >* Area 2 is a stub network.
> > >
> > > Where is the backbone? (area 0.0.0.0)
> >
> >The backbone is located on R3, loopback interfaces l0, l1 and l2.
>
>Are those interfaces in area 0? Your notes say 1.
>
>
>
>
> >Debbie
> >
> > >
> > > >I don't see routes in R3 to R5, except for the directly connected.
And
> > > >vice versa from R5 to R3. In addition, on R5 I have formed a neighbor
> > > >relationship, but have no routing table, except for the directly
> > > >connected.
> > > >
> > > >I tried setting up a virtual link through Area 1, but it will not
>because
> > > >Area 1 is an NSSA.
> > > >
> > > >I don't know what I'm missing.
> > > >
> > > >Thanks for any assistance
> > > >
> > > >Debbie
> > > >.
> > > .
>.
>.
.
.
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