Re: Is it possible to share a physical interface and a routing

Dear Andrew,

Thank you for your comments and providing your knowledge!

Wow, "Route Leaking"... I didn't know that, sounds interesting.

Anyway I try it today and update soon.

Best regards,

Achi :)

> I did something similar in my lab when trying to learn VRF Lite. I do
> not have the set up running anymore ... ;-(
>
> Basically you have VRFs off of a global router and you need to share
> some access to and from the VRF / global tables. This can be done via a
> manual process.
>
> In my lab, I used global static routes to advertise these VRF resources
> into the global table. I simply redistributed these static routes into
> my global OSPF and now every other global router knew of these destinations.
>
> I then used static routes within the VRF's routing table to advertise
> reachability to global resources. Again, I redistributed the static
> routes into my VRF routing process.
>
> Lastly when return traffic would come from global locations and hit my
> global router, I used static routes to the inside VRF interface.
> Sounded weird to me too! But it works fine on the router and return
> traffic was routed just fine.
>
> Everything worked and it was a bugger to get working ... mostly because
> I had to think through everything and I was learning the entire time.
>
> (watch the ugly word wrap):
> http://www.cisco.com/en/US/tech/tk436/tk832/technologies_configuration_example09186a0080231a3e.shtml
>
>
> Good luck and hit us back with any questions and or comments,
>
> Andrew Lissitz
>
>
> .
> 2010/2/1 <a-naka_at_mtf.biglobe.ne.jp <mailto:a-naka_at_mtf.biglobe.ne.jp>>
>
> Hi guys,
>
> Is it possible to share a physical interface and a routing by some VRFs?
>
> I need to connect one local hub CE router R1 and some remote spoke
> CE routers R2, R3, ..., Rx via GRE tunnel.
> I also need to isolate them by using VRF on R1, because remote sites
> address space can be overlapped.
>
> R1 fa0/0 -------+------- R2
> +------- R3
> +------- .
> +------- .
> +------- .
> +------- Rx
>
> To establish GRE tunnel for each remote spoke CE router, I want to
> share the physical interface fa0/0 and default route via the
> interface by those VRFs.
> I don't want to configure several loopback interfaces for every each
> site, because I have only 1 global ip address which is reachable
> from each remote site.
>
> I would appreciate it if anybody gave me an idea.
>
> Achi :)
>
>
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> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com <mailto:all.from.nj_at_gmail.com>

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Received on Wed Feb 03 2010 - 06:59:46 ART