From: Andy (and123and@googlemail.com)
Date: Tue Mar 18 2008 - 08:54:02 ART
Ahsan
Im looking at Lab 3 section 4.6 of IE Core labs, Im unable to paste it in as
its in pdf but heres what it says:
4.6 OSPF Loopback Advertisement
Advertise the loopback0 network of R1 into OSPF area 0
Advertise the loopback0 network of SW1 into OSPF Area 17
These networks should appear in all other OSPF enabled routes with a /24
mask
Have you got the latest versions? Id suggest downloading the latest copies.
hth
-A
On 18/03/2008, Ahsan Mohiuddin <ahsan.mohiuddin@yahoo.com> wrote:
>
> That's incorrect. See below:
>
> *4.6. OSPF Loopback Advertisement*
>
> Advertise the Loopback0 network of R1 and SW1 into OSPF area 17.
> These networks should appear in all other OSPF enabled routers with a /24
> subnet mask.
>
> In fact I searched the pdf for the string "area 0" and found no match.
> Regards,
> Ahsan
>
>
> *Andy <and123and@googlemail.com>* wrote:
>
> Hi Ahsan
>
> You are right in saying that one area has to have a touchdown in area 0,
> in this lab if you read ahead to Task 4.6 it asks you to put lo0 in area 0
> on R1. This would have allowed you to config virtual links, the "brains"
> also suggest that this is one reason to read the entire lab before
starting.
>
> hth
> -A
>
>
> On 18/03/2008, Ahsan Mohiuddin <ahsan.mohiuddin@yahoo.com> wrote:
> >
> > Hello Group,
> >
> > in subject task, we have three ospf areas 17, 135, 34, with ABRs sitting
> > between (17, 135) and (135,34).
> >
> > The task states: "Without regard to network redundancy, use the minimal
> > number of virtual links needed to support this OSPF domain." If I am not
> > mistaken, its asking me to attain reachability across the entire ospf
> > domain.
> >
> > The solution guide shows a virtual link between the aforementioned ABRs.
> > However, when I LABed it, the virtual link never comes up. I remember
> > reading somewhere that at least 1 ABR has to be in Area 0, but in this
case
> > there IS no area 0.
> >
> > My Solution? Multipoint GRE tunnel between the ABRs (actually the ABRs
> > sit on a common NBMA net with a third ospf router.. all three of them in
> > area 135, hence the multipoint tunnel) Apparently, it works.
> >
> > I still don't know whether virtual-links could have been used instead,
> > and perhaps in a more clean way. Any ideas?
> >
> > Regards,
> > Ahsan
> >
> >
> >
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