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draft-defeng-l3vpn-ipv4-ipv6-hybrid-01 Route Distribution (Method 1 for Case 1) Both IPv4 routes and IPv6 routes are distributed between CE-PE, BGP4+,IS-ISv6 and OSPFv3 can carry IPv4/ IPv6 routes simultaneously. Every two of PEs and ASBR1 in IPv4 AS establish MP-IBGP based on IPv4; Every two of PEs and ASBR2 in IPv6 AS establish MP-IBGP based on IPv6; ASBR1 and ASBR2 establish MP-EBGP based on IPv6; VPN-IPv4 routes and VPN-IPv6 routes can be piggybacked on the same MP-BGP; PEs maintain VPN-IPv4 routes and VPN-IPv6 routes in respective VRFs, they are differentiated by the AFI of the routes received. |