New IPv4/IPv6 transition solution for data center

Since IPv4 address space is already depleted and many IPv6 trial networks have been verified successfully, it is urgent to deploy IPv6 commercial networks in large scale. Most Internet applications or services are still based on IPv4 protocol only. The intercommunication between IPv6 hosts and IPv4 services is needed. Besides, even if IPv6 backbones are built up overnight, there will be many IPv4 islands isolated by IPv6 oceans. IPv4 hosts will have great difficulty to access IPv4 contents in Internet data centers (IDC) when scheduled by the global server load balancer of content delivery network (CDN). This paper proposes a new IDC IPv4/IPv6 transition solution to solve these problems. It has been deployed in IPv6 campus network and provides IPv6 users with IPv4 contents from CDN based on IPv4.