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draft-defeng-l3vpn-ipv4-ipv6-hybrid-01 Address Requirements (Method 1 for Case 1) Should support two AFI, 1 for IPv4 and 2 for IPv6, SAFI:128; Two IPv4 sites communicate with IPv4 address; Two IPv6 sites communicate with IPv6 address; One IPv4 site and one IPv6 site communicate with IPv6 address; IPv4 address A.B.C.D/Mask mapped to 0::A:B:C:D/(96+MASK) IPv6 address if necessary; PEs and ASBRs should support IPv4/IPv6 dual-stack and maintain both VPN-IPv4 routes and VPN-IPv6 routes; CEs in IPv4 sites which have relations only to other IPv4 sites can support only IPv4 protocol and maintain IPv4 VPN routes, otherwise CE should support IPv4/IPv6 dual-stack; |