Based on the tunneling technique IPv6-over-IPv4, a newly added Campus Network of IPv6 is developed. The topological diagram is designed. Static routers’ ports are set and IP addresses are distributed. The configuration commands of routers are analyzed respectively. Several factors such as server load and network delays and network throughput are analyzed. Thus, transparent connection with IPv6-over-IPv4 is implemented based on the tunneling principle. And a technical method is provided for IPv4/IPv6 co-existing network.