Use the edge router solution to transition to IPv6

China's Edge Routers are still widely used, so I studied how to use the edge router solution to transition to IPv6. Here I will share with you, hoping to be useful to you. No one will be willing to stop the network and wait for it to upgrade from IPv4 to IPv6, because people can no longer stand the days without the network. Scientists are working hard to design various approaches to achieve a stable transition from IPv4 to IPv6. The famous Internet Engineering Task Group IETFInternet Engineering Task Force) recently developed a variety of technical solutions. If these technologies are effectively combined, they can achieve seamless transition from IPv4 to IPv6, at the same time, you can expand the capabilities of the edge router.

An edge router is used to connect a user's system on his or her LAN to the Internet. It is the portal for the user's system to access the Internet. Many Edge Routers currently use Network Address Translation (NATNetwork Address Translation), which enables users to protect and save their own IP addresses. NAT replaces the TCP/IP address in the user's LAN with the TCP/IP address of the router, making the user's LAN look like there is only one system from the Internet. Although NAT can save network space and alleviate the shortage of IP addresses, it also brings some trouble. With NAT, external users will regard the entire subnet in NAT as a computer, which brings about some inherent problems. For example, if there are multiple Web servers in the subnet, network users will not be able to access them, because these servers need their own IP addresses; multimedia and interactive Internet applications cannot even use NAT routers. In addition, NAT devices cannot be nested and cannot implement multiple subnets. With the widespread application of NAT, it also limits the VPN extension, limits the application of encryption and network security technologies, and more importantly, it does not run well on IPv6 networks.

Simple transition

Because there are a lot of IPv4-based hardware and software, the transition to IPv6 should be as simple as possible. IETF has published a series of documents on transition edge routers. These documents include: DNS-ALG-Domain Name System extended network address translation, which specifies how DNS is extended to NAT, this article also gives an overview of how DNS converts the address list when DNS data packets enter another address domain from one address domain. SIIT-seamless IP/ICMP conversion algorithm RFC 2765) specifies the conversion method between IPv4 and IPv6 Data grouping headers, so that IPv6 hosts can communicate on IPv4 routing networks. NAT-PTNAT-protocol conversion (RFC 2766) specifies a method for converting a private IPv4 data group to a public IPv6 Data Group. 6to4-connecting to the IPv6 domain RFC 3056 through IPv4) specifies how to encapsulate the IPv6 Data Group so that it can pass the IPv4 Backbone Network seamlessly.

Eliminate NAT Defects

If the above technologies are organically combined, an environment can be implemented so that the existing IPv4 version of the system can run on the IPv6 backbone network. Add IP Security for VPN tunnel), configurable firewall for each protocol, Ipv6 router, automatic settings, multimedia services, and a Web interface to manage all of this, then, the edge router can eliminate many shortcomings of the current NAT and seamlessly connect to the Internet backbone network of the future IPv6. Edge Routers have many advantages when using these technologies. For example, a network administrator can choose to hide or expose certain network elements in the network, such as Web servers and databases, to Internet users. IP addresses can be reused in multiple separate subnets to ease IP address management in the VPN. In addition, users can automatically access the Internet and a dedicated VPN at the same time.

Service providers can provide access devices to provide scalable services for home users. They can also remotely configure these devices and services from the terminal. End users can enjoy the seamless multimedia communication service. After the Internet is transitioned to IPv6, users do not need to change their own edge routers.