As the base of the digital economy and the representative of the new generation of information infrastructure, the scale deployment and application of IPv6 is not only the demand of digital transformation, but also the necessity of the evolution and upgrading of the next generation Internet. In 2021, the number of IPv6 users and traffic in China achieved double growth, and remarkable results were achieved in scale deployment and application. In 2022, China's IPv6 development has entered a year of innovative development led by the upgraded version of IPv6 +. Whether it is policy traction or technological innovation, network and application upgrading, it will effectively drive the development of IPv6 in China to run out of a new "+" speed. —— editor Policy traction: accelerate the scale deployment and application of IPv6 Digital economy development plan in the 14th five year plan In the "14th five year" digital economy development plan (hereinafter referred to as the "plan") recently issued by the State Council, it is clearly proposed that the number of IPv6 active users should increase from 460 million in 2020 to 800 million in 2025. Looking back on the 13th Five Year Plan period, China's information infrastructure, including IPv6, has achieved global leadership; Looking forward to the 14th five year plan, promoting the large-scale deployment and application of IPv6 has become an important part of the "information network infrastructure optimization and upgrading project", The plan clearly proposes to "carry out in-depth IPv6 transformation of network infrastructure, enhance network connectivity, optimize network and application service performance, improve infrastructure business carrying capacity and terminal support capacity, and deepen IPv6 transformation of various websites and Applications". Notice on accelerating the scale deployment and application of Internet Protocol version 6 (IPv6) The central network information office, the national development and Reform Commission and the Ministry of industry and information technology issued the notice on accelerating the scale deployment and application of Internet Protocol version 6 (IPv6) (hereinafter referred to as the notice) in July 2021. *** Over the past three years, all regions and departments have earnestly implemented the action plan for promoting the scale deployment of Internet Protocol version 6 (IPv6), and made remarkable progress in promoting the scale deployment of IPv6. The 14th Five Year Plan period is an important strategic opportunity period for accelerating digital development and building a network power and digital China. China's IPv6 development is at a critical stage of overcoming difficulties and crossing the inflection point. Facing the risks and challenges of not advancing or retreating, it is urgent to comprehensively and deeply promote the scale deployment and application of IPv6 and accelerate the evolution and upgrading of the Internet. The notice proposes to take comprehensively promoting IPv6 technology innovation and integrated application as the main line and improving the breadth and depth of application as the main direction, and strive to build an open and innovative technology system, advanced facility system, fully covered application system, ecologically sound industrial system, systematic standard system and independent and controllable security system, Realize the transformation of IPv6 scale deployment and application from being able to use to being easy to use, from quantity to quality, and from external driving to endogenous driving, create new advantages in innovation and development, and provide solid support for building a network power and digital China. The notice specifies that by the end of 2025, a leading IPv6 technology, industry, facilities, application and security system will be fully established, and China's IPv6 network scale, user scale and traffic scale rank first in the world. Networks, platforms, applications, terminals and various industries fully support IPv6. New websites and applications, networks and application infrastructure are added, and IPv6 single stack is deployed to form an innovation led, efficient and collaborative self driven development trend. The number of IPv6 active users reached 800 million, and the number of IPv6 connections of the Internet of things reached 400 million. The mobile network IPv6 traffic accounts for 70%, and the metropolitan area network IPv6 traffic accounts for 20%. Government websites above the county level, major domestic commercial websites and mobile Internet applications fully support IPv6. China has become an important driving force for global IPv6 + technology and industrial innovation, and the independent innovation ability of network information technology has been significantly enhanced. IPv6 traffic improvement plan (2021-2023) In July 2021, the Ministry of industry and information technology and the central network information office issued the three-year special action plan for IPv6 traffic improvement (20212023) (hereinafter referred to as the action plan), which made it clear that in the next three years, we should take IPv6 traffic improvement as the main goal, focus on complementing the short boards of IPv6 deployment in applications, terminals and other links, and strive to improve the service capacity and quality of networks and application infrastructure, Vigorously promote the integration, innovation and development of new IPv6 technologies and economic and social fields, simultaneously promote the planning, construction and operation of network security system, and promote the overall quality improvement and upgrading of key links of IPv6. According to the action plan, by the end of 2023, the proportion of IPv6 traffic in China's mobile network will exceed 50%, and the scale of IPv6 traffic in fixed network will reach more than three times that at the end of 2020; The average IPv6 concentration of the top 100 commercial mobile Internet applications in China exceeds 70%; Fixed terminals that obtain IPv6 addresses account for more than 80%. Wu Hequan, academician of Chinese Academy of Engineering: IPv6 "+" speed innovation to build a new generation of high-quality network base As the base of the digital economy, China's large-scale deployment of IPv6 continues to achieve new results. As an upgraded and enhanced version of IPv6, IPv6 + is more in line with the needs of industry users and can more effectively support the digital transformation and development of thousands of industries with many innovations in the fields of protocol and technology. Obviously, accelerating IPv6 + innovation will add "+" power and "+" speed to the scale deployment of IPv6. So, what is the current stage of IPv6 + development? How to accelerate innovation and release new momentum? Wu Hequan, an academician of the Chinese Academy of engineering, recently answered these questions. Over 600 million active users, China's IPv6 scale deployment has achieved remarkable results "At present, China's IPv6 address resources rank first in the world, and the number of IPv6 active users and traffic have increased." Wu Hequan said. Data show that China has applied for 60059 IPv6 address resources, ranking first in the world. At the same time, according to the real-time sampling and monitoring of typical Internet application legal persons, as of December 2021, the number of IPv6 active users in China has reached 608 million, accounting for about 60.11% of Chinese Internet users. In terms of traffic growth, as of December 2021, the total IPv6 traffic of man has exceeded 44.77 TBPs, accounting for 9.38% of the total traffic of the whole network; The total IPv6 traffic of mobile network exceeds 24.43tbps, accounting for 35.15% of the total traffic of the whole network. "Comparing the proportion of IPv6 traffic and active users, it can be found that the proportion of traffic is relatively low, mainly because the upgrading of home gateway has not kept up." Wu Hequan pointed out. He believes that the next step is to upgrade the fixed network to Gigabit network, so that the fixed network gateway has the function of home wireless gateway in the future, and prepare for the direct application of IPv6 function by wireless gateway. Thanks to strong policy guidance, the scale deployment and application of IPv6 in China are in full swing. The 14th five year plan for the development of digital economy issued by the State Council recently clearly proposes to promote the large-scale deployment and application of IPv6: "carry out in-depth IPv6 transformation of network infrastructure, enhance network connectivity, optimize network and application service performance, improve the business carrying capacity and terminal support capacity of infrastructure, and deepen the IPv6 transformation of various websites and applications." In the notice on accelerating the scale deployment and application of Internet Protocol version 6 (IPv6) issued last year by the central network information office, the national development and Reform Commission and the Ministry of industry and information technology, the key direction of promoting the scale deployment and application of IPv6 in the next five years is defined, and it is clear that by 2025, the number of IPv6 active users will reach 800 million, and the proportion of mobile network IPv6 traffic will reach 70%, The proportion of IPv6 traffic in metropolitan area network reaches the goal of 20%. IPv6 + has entered the stage of 2.0 to drive the development of industrial Internet in an all-round way As the base of digital economy, IPv6 is the direction of Internet upgrading and evolution and network technology innovation. It supports the construction of Digital China from the aspects of digital government, digital society, digital economy and digital ecology. "In the face of the new needs of the digital economy, IPv6 urgently needs to continuously improve its performance in the six dimensions of wide connection, ultra wideband, deterministic transmission, low delay, automation and network security, so as to effectively meet the needs of interconnection of all things, massive data, production on the cloud, cloud network integration, intelligent operation and maintenance, security and credibility." Wu Hequan pointed out, "IPv6 + is a systematic upgrade of IPv6, so as to build a new generation of high-quality network base." "Upgrading from IPv6 to IPv6 + is a phased process from IPv6 + 1.0 to 2.0 and then to 3.0." Wu Hequan stressed. From 2020 to 2021 is the 1.0 stage focusing on network programming capability. It mainly promotes the application of srv6 (segmented routing) protocol, which aims to simplify the network and realize the flexible cross domain opening of VPN dedicated lines of operators and partial autonomy of the network. From 2022 to 2023, it is phase 2.0, focusing on user experience guarantee. In phase 2.0, we mainly focus on network slicing, streaming detection, new multicast, certainty, security, etc., so as to meet the application requirements of 5g 2B, industrial Internet, cloud network integration, computing network and other applications, and realize the conditional autonomy of the network. From 2023 to 2025, IPv6 + will enter the stage of 3.0 and realize application driven network. This stage will give better play to the advantages of application aware network, application driven network programming and network stream by stream SLA guarantee, realize application awareness, create a highly autonomous network and meet the needs of a wider range of personalized customized networks. "At present, IPv6 + is in the middle stage of development. On the one hand, we should go further on the original basis to make the whole network better meet the needs of the current computing network and industrial Internet; on the other hand, we need to move towards the future IPv6 + 3.0 stage." Wu Hequan pointed out. The current 2.0 phase of IPv6 + will focus on promoting the standardization process from three aspects. The first is VPN +, which can meet the differentiated service requirements of different users / services through flexible on-demand slicing. The performance of ifit can be detected in real time, and the performance of ifit can be detected in real time. Finally, bierv6 (explicit replication of bit index based on IPv6), which provides more simplified and efficient support for multicast services based on IPv6. Standards lead to accelerate IPv6 + innovation and development Industrial development, standards first. In the field of IPv6 +, China has contributed more than half of the draft international standards and has become the main force to promote the development of IPv6 +. Innovation is the key driving force for the development of IPv6 +. Apn6 (Application Awareness Based on IPv6) enhances the network's ability to perceive services. In the past, the header of IPv4 only contained the source address and destination address. The network could not recognize the service type and service registration (SLA) requirements carried by the IP packet. The network usually adopts the light load method and the resource utilization is low. Apn6 uses IPv6 extended header to embed the channel requirements of the service, and organizes the channel based on this. In the future, the IPv6 extended header can also be used to embed the data attributes carried to support the management of cross-border data flows. In this way, "the problem that we can only rely on the application perception of the control surface in the past is solved, which is conducive to the seamless connection of the cloud network, and the performance and application prospect of apn6 can be further explored." Wu Hequan said. The continuously innovative srv6 helps IPv6 + realize the rapid establishment of routing. By using srv6, the traffic forwarding path can be specified in the IPv6 address extension header, so as to quickly establish an end-to-end route. The intermediate router does not need to think or calculate. This mode has low delay, fast switching