[c-nsp] Sanely leaking a locally sourced default route from one VRF into another

[Adam Vitkovsky]

> I've leaked the default from inet into resi using a combination of 'import
route-target' statements and 'import map' statements on the PEs as required.
I believe the easiest solution is as follows.  
On the RR PE that originates the default route configure vrf resi. 
Than create a static default route in that vrf resi and for the next hop,
use the interface that points to internet and IP of the eBGP neighbor (you
can use tracking next-hop and floating static backup default route). 
Than advertise the static via MP-BGP to all other PEs with vrf resi. 

There should be a mechanism to accomplish extranet vpn on destination PEs as
well -but I'm not sure how would I accomplish that. 
We should be looking for some articles regarding extranet vrfs
I'd love to hear any ideas. 

adam