[j-nsp] 6PE RR & next-hop resolution best practices

[James Jun]

Hello,

Consider the following scenario, typical MPLS setup:  PE -- P -- P -- PE.   The P core routers are serving as route-reflectors for PE's.  The topology is a RSVP full mesh between PE's only -- the P routers do not have LSPs to anybody, they're simply acting as pure signaling & thru-traffic boxes for the transiting LSPs between PE's.

Now, because the P core routers don't have LSPs themselves heading to edges, there is no 'inet.3' table to fill; thus 'ipv6-tunneling' has nothing to copy into inet6.3.   With P routers are acting as RRs for 6PE, you can see the obvious problem:  they can't resolve ipv4-mapped-ipv6 next-hops in 6PE, therefore closest-exit routing breaks for route-reflector clients (i.e. IPv6 traffic to a peer in same city exits out via other coast as there is no IGP distance to reference).

Now, short of spamming LDP or going LSP-explosion-mode on every RRs, are there any recommendations for best practices to cleanly feed resolution reference for 6PE routes to RR's?  

Thank you in advance!
James