From: Ahsan Mohiuddin (ahsan.mohiuddin@yahoo.com)
Date: Tue Mar 18 2008 - 11:00:05 ART
aright.. thanks a ton
Andy <and123and@googlemail.com> wrote: 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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