Ref : INE VOD 26. Inter-AS MPLS L3VPN
INTER-AS setup has
R1 - XR1 peering rtr between two AS.
R2 - XR2 vpnv4 RR rtr.
R4 ,R2 ---- R5,XR2 --- PE edge router connecting to customer ce routers.
route-target import command on R4 ,R2 ,R5 XR2 is MUST.
In addtion to this do we need to configuration route-targe import command on peering rtr (R1-XR1) and vpnv4 RR rtr (R2-XR2).