[c-nsp] BGP with yourself...

[Wink]

Er..

There is a feature in IOS to accomplish inter-VRF routing on the same 
router.  It is accomplished by spoofing the router-id within a VRF.

http://www.cisco.com/en/US/docs/ios/12_2sr/12_2sra/feature/guide/srbgprid.html

Luan Nguyen wrote:
> Very interesting.  I have a problem with having an ethernet in global doing
> NAT over a VRF, and the vrf doesn't know how to get to the ethernet LAN
> segment in the global.
> I was thinking of just doing:" ip route vrf whatever 1.1.1.0 255.255.255.0
> 3.3.3.3 global, where 3.3.3.3 is just some bogus nonexistence address (just
> to dump the packets destined for 1.1.1.0 out into the global since you can't
> put ethernet0 global because you can't do VPN route to a  non-point-to-point
> interface)
> I can imagine us using this "dynamic route exchanger" way when needing to
> move lots of routes.
>
> -lmn
>
> On Thu, Apr 24, 2008 at 5:19 PM, Asbjorn Hojmark - Lists <lists at hojmark.org>
> wrote:
>
>   
>>> Now it trying to have an iBGP-session with itself,
>>>       
>> How strange. Normally it'll complain that it can't peer with
>> itself.
>>
>>     
>>> a thing I normally can't configure. :-)
>>>       
>> That actually is possible: Set up two loopbacks, create a tunnel
>> between the loopbacks, and peer over that tunnel with one end of
>> the BGP session in a VRF (vpnv4).
>>
>> (I did that recently to get routes from the global table into a
>> VRF. It's annoying there's no good way to do that on a single
>> router).
>>
>> -A
>>
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