MPLS Layer 3 VPN Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.6.x - Implementing DCI Layer 3 Gateway between MPLS-VPN and EVPN Data Center [Cisco ASR 9000 Series
Route Distinguishers and Route Targets - PacketLife.net
MPLS Layer 3 VPN Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.6.x - Implementing DCI Layer 3 Gateway between MPLS-VPN and EVPN Data Center [Cisco ASR 9000 Series
Advertising interface route into different VRFs - Cisco Community