i have used this topology
and created sub interface in Pre-agg router on g2.10 interface and on DC1 have created svi intface on g3.10
both have same vlan and subnet
i configured exactily as you mentioned in Mpls vpn configuration example , but im not able to ping from svi ip 172.16.1.1 to svi ip 172.16.1.254 .
can you help on this, pls.