Okay but the point still stands ie. if you are always using the primary why do you need to have 7k routes on any internal devices because what is IBGP/OSPF giving you here other than using resources on the network devices.
If you could get a default route from the MPLS cloud then by far the simplest solution is to -
1) run an IGP between the CE and core switches. Redistribute the default into the IGP.
2) on the core switches configure a floating static default route with an AD higher than the IGP learned route pointing to the backup router.
If the CE fails the core switches automatically install the floating static and use the backup link. And if the CE comes back then the default route is learnt again and the floating static is removed from the IP routing table.
No need for 7k worth of prefixes on your core switches devices, only one default route needed.
I'm not trying to not answer your question it's just that if you could receive a default route on the CE from the MPLS cloud it would make it a lot simpler and use a lot less resources on your devices.
Note for this to work properly the default route would need to be received from the MPLS network not generated by the CE device itself.
So is there a possibility of this ?
Edit - you would still need all the routes on the CE if this is MPLS any to any connectivity but only a default route would need to passed back to the core switches.
Jon
