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IPv4 over IPv6 Softwire with L2TPv3: Case 2 – Router behind CPE as Softwire Initiator LNS CPE Dual AF Router IPv6 IPv4 Address Assignment and DNS via new L2TPv3 AVPs Private IPv4 addresses and DNS, etc. DHCP ISP to Dual AF Router IP Assignment and Auto-Config Dual AF Router to Hosts IP Assignment and Auto-Config IPv4 Payload L2TPv3 o IPv6 |