它焦北京丽究器 Content ±想 The significance of IPv6 to telecom he Challenges for IPv6 The works of China Telecom Further research IPv6 study in China Telecom 赵慧玲解冲锋 The signⅰ ificance of IPv6 to ISP±电 Large address space ± A global-reachable address for everything Large address Space Enables end-to-end reachability and end-to-end Efficient routing communications Improved QoS support support multiple levels of hierarchy inside the Security support Aggregation of prefixes announced in the global routing table. efficient and scalable routing. Multiple simultaneous addresses for hosts More flexibility, new functionalities 国电集团公司《h1 ± Simple packet header Extension headers A new flow label inside the IP header. No checksum at the IP layer at the IP layer. No recalculations by the routers IPv6 header is designed to optimize software implementation No packet segmentation in routers But does not solve the Qos problem Provides routing efficiency, performance and forwarding rate scalability Still under discussion Enables faster forwarding rate and end nodes processing
1 中国电信集团公司（China Telecom Corporation） 1 IPv6 study in China Telecom 赵慧玲 解冲锋 中国电信集团公司（China Telecom Corporation） 2 Content •The significance of IPv6 to telecom operators •The Challenges for IPv6 •The works of China Telecom •Further research 中国电信集团公司（China Telecom Corporation） 3 The significance of IPv6 to ISP •Large address Space •Efficient routing •Improved QoSsupport •Security support •Mobility support •etc. 中国电信集团公司（China Telecom Corporation） 4 Large address space • A global-reachable address for everything. • Enables end-to-end reachability and end-to-end communications. • support multiple levels of hierarchy inside the address space. • Aggregation of prefixes announced in the global routing table,efficient and scalable routing. • Multiple simultaneous addresses for hosts . • More flexibility, new functionalities. • others... 中国电信集团公司（China Telecom Corporation） 5 Efficient routing •Simple packet header –Extension headers –No checksum at the IP layer. –Routing extension header •No recalculations by the routers. •No packet segmentation in routers •Provides routing efficiency, performance and forwarding rate scalability. •Enables faster forwarding rate and endnodes processing. 中国电信集团公司（China Telecom Corporation） 6 Improved QoS support •A new flow label inside the IP header. –Enables per flow processing for differentiation at the IP layer. •IPv6 header is designed to optimize software implementation •But does not solve the QoSproblem completely –Still under discussion
Pv6 Security support 中电 Mobility support ±想 aH and esp extension header used with ·Bult- in on ipv6 IPsec indicates any node can use it Built-in on ipv6 No foreign agent Means any node can use it Solve the problem of triangle routing"in nobile ipv4 End-to-end network security(integrity notication, confidentiality) Efficient routing means performance for end-users The Challenges for IPv6 ±| The works of China Telecom± As a new technique, IPv6 is also market Address application driven Equipment test IPv6 testbed According to our estimation, the IPv4 addre Technical Experiments will still be enough by the end of 2008 Current 3G deployment and NGN equipment is mainly based on IPv4 国电集团公司《h1 IPv6 testbed of_China Telecom tfes China Telecom filled the IPv6 allocation China Telecom has built a IPv6 testbed in est form and Hunan for IPv6 network and service tria address block from APNIC in Sept 2002 Composed of equipments from GSR to Access devices Interconnection with other Ipv6 networl Access network ADSL. LAN WLAN PIC Provide access service to end users 2001:0c68:/32
2 中国电信集团公司（China Telecom Corporation） 7 IPv6 Security support •AH and ESP extension header used with IPsec •Built-in on IPv6 –Means any node can use it. •End-to-end network security (integrity, authentication, confidentiality) . 中国电信集团公司（China Telecom Corporation） 8 Mobility support •Built-in on IPv6 –indicates any node can use it •No foreign agent •Solve the problem of “triangle routing”in mobile IPv4 •Efficient routing means performance for end-users. •Others... 中国电信集团公司（China Telecom Corporation） 9 The Challenges for IPv6 •As a new technique, IPv6 is also marketdriven. –IPv6 application is sparse, no specific application which can only be based on IPv6. –According to our estimation, the IPv4 address will still be enough by the end of 2008. –Current 3G deployment and NGN equipment is mainly based on IPv4. 中国电信集团公司（China Telecom Corporation） 10 The works of China Telecom •Address application •Equipment test •IPv6 testbed •Technical Experiments 中国电信集团公司（China Telecom Corporation） 11 Address application •China Telecom filled the IPv6 allocation request form and successfully received the address block from APNIC in Sept. 2002. 2001:0c68::/32 中国电信集团公司（China Telecom Corporation） 12 IPv6 testbed of China Telecom •China Telecom has built a IPv6 testbed in Hunan for IPv6 network and service trial. –Composed of equipments from GSR to Access devices –Interconnection with other IPv6 networks –Access network:ADSL, LAN, WLAN, –Provide access service to end users
Network topology 中电 Service and application ±想 Phase 2 Currently, multiple services have been supported by this network conferencing/PDA Technical Experiments ± Some results ± In addition to Network experiment, China Current IPv6 deployment in ADSL scenario Telecom also done some experiments are not mature. more work need to be done focused on specific IPv6 techniques, such as to support more terminals over various IPv6 in Broadband Access Network access networks IPv4/IPv6 transition Tunneling and double stack mechanist IPv6 Security have been widely supported in current IPv6 IPv6 Qos routers, but few BAS equipment support IPv6 Application IPv6. Automatic tunneling will be useful for double stack user to visit ipv network 国电集团公司《h1 Some results Some results ± Some equipments have Qos functions Various IPv6 based applications products similar to IPv4, but whether IPv6 Qos has emerged, such as Web, VolP, Video functions can meet future requirements is conferencing, and Streaming media. But still doubted there is still a great gap to transform these IPv6 IPsec has been partly implemented in applications into commercial services Microsoft Windows and Free BSD operating stem, but have not been widely supported in Router equipments
3 中国电信集团公司（China Telecom Corporation） 13 Network topology 中国电信集团公司（China Telecom Corporation） 14 Service and Application •Currently, multiple services have been supported by this network –Web / VoIP / Streaming media/ Video conferencing / PDA –But these products and services are experimental 中国电信集团公司（China Telecom Corporation） 15 Technical Experiments •In addition to Network experiment, China Telecom also done some experiments focused on specific IPv6 techniques, such as –IPv6 in Broadband Access Network –IPv4/IPv6 transition –IPv6 Security –IPv6 QoS –IPv6 Application 中国电信集团公司（China Telecom Corporation） 16 Some Results •Current IPv6 deployment in ADSL scenario are not mature, more work need to be done to support more terminals over various access networks. •Tunneling and double stack mechanism have been widely supported in current IPv6 routers, but few BAS equipment support IPv6. Automatic tunneling will be useful for double stack user to visit IPv6 network. 中国电信集团公司（China Telecom Corporation） 17 Some Results •Some equipments have QoS functions similar to IPv4, but whether IPv6 QoS functions can meet future requirements is still doubted. •IPv6 IPsec has been partly implemented in Microsoft Windows and FreeBSD operating system, but have not been widely supported in Router equipments. 中国电信集团公司（China Telecom Corporation） 18 Some Results •Various IPv6 based applications products has emerged, such as Web, VoIP, Video conferencing, and Streaming media. But there is still a great gap to transform these applications into commercial services
Further research 中电 IPv6 Access solution ±想 IPv4/IPv6 transition/Interconnection with which is the point that IPv6 will show its advantages other networks solution will be designed, for · Business model there are different access method: ADSL, LAN WLAN 3G, satellite, etc DA, home devices, automobile, e The issues that should be addressed by each access solution are address allocation, naming, AAA and mobili IPy4/Pv6 transition ±也 usiness model ± Applications and services is the engine of Business model will be the most importan IPv4/IPv6 transition for IPv6 success. which is the drive for Smooth transition maybe be only a dream IPv4/IPv6 transition Telecom operators should find a way to The future IPv6 network will support more ntegrate various transition techniques to wide variety of services than current IPv4 create a transition plan for future transition netwo Different operators have different transition Different IPv6 applications have different rocedures due to the difference between business model their networks 国电集团公司《h1 Suggestions ± Continues to research and doing experiment Emphasize the cooperation with other ISPs equipment vendors, universities and Focus on IPv6 application and service development and business model THANK YOu I
4 中国电信集团公司（China Telecom Corporation） 19 Further research •IPv6 Access solution •IPv4/IPv6 transition/Interconnection with other networks •Business model 中国电信集团公司（China Telecom Corporation） 20 IPv6 Access solution • IPv6 solution in access network is very important, which is the point that IPv6 will show its advantages. • Multiple access solution will be designed, for –there are Different access method: ADSL,LAN, WLAN,3G,satellite,etc – there are various user terminals: PC, mobile phone, PDA, home devices,automobile,etc • The issues that should be addressed by each access solution are address allocation, naming, AAA and mobility. 中国电信集团公司（China Telecom Corporation） 21 IPv4/IPv6 transition •Applications and services is the engine of IPv4/IPv6 transition. •Smooth transition maybe be only a dream. •Telecom operators should find a way to integrate various transition techniques to create a transition plan for future transition •Different operators have different transition procedures due to the difference between their networks. 中国电信集团公司（China Telecom Corporation） 22 Business model •Business model will be the most important for IPv6 success, which is the drive for IPv4/IPv6 transition. •The future IPv6 network will support more wide variety of services than current IPv4 network. •Different IPv6 applications have different business model. 中国电信集团公司（China Telecom Corporation） 23 Suggestions •Continues to research and doing experiment. •Emphasize the cooperation with other ISPs, equipment vendors, universities and research communities. •Focus on IPv6 application and service development and business model. 中国电信集团公司（China Telecom Corporation） 24 THANK YOU ！