From: Dale Kling (dalek77@gmail.com)
Date: Tue Jul 29 2008 - 11:15:59 ART
Been a while since I worked on that lab, but I'm thinking it might have
something to do with summarizing in that area you're creating that virtual
link across. Check to see if you're using an area range into that area on
the ABR. When you create a virtual-link across an area you're summarizing
into, you break the summarization. It's pretty tricky, I didn't notice that
behavior until the Brian's pointed it out.
Also, sometimes creating virtual-links can come up with a cost of 65535.
This sometimes happens when the router-id you're using in the virtual-link
command recurses to a route with a cost of 65535. That is caused sometimes
by adjusting the auto-cost in OSPF to a high value. In this case you can
adjust the cost of that specific route or use a tunnel to bypass the
virtual-link.
HTH,
Dale
On Tue, Jul 29, 2008 at 10:04 AM, gui-doo laduchesse <gui_doo@hotmail.com>wrote:
> Hi,
> On the lab 7, task 4.7 I was trying to make it work by using a Virtual-link
> between R1 and R5 in area 1. After that I try to summarize the same way as
> in
> R5. When I go to R3, I still see all the loopback specific route of R5 and
> R4.
> I see that in the solution, the y state that we have to use a tunnel. I
> don't
> get what the Virtual-Link as diffrent as the tunnel in area 0...
>
> Thanks
> Guillaume
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