13 - 中国电信的IPv6研究.pdf

Content
•The significance of IPv6 to
operators
•The Challenges for IPv6
•The works of China
•Further research
IPv6 study in China
赵慧玲解冲锋
中国电信集团公司(China Corporation) 1 中国电信集团公司(China Corporation) 2
The significance of IPv6 to ISP Large address space
• A global-reachable address for everything.
•Large address Space • Enables end-to-end reachability and end-to-end
•Efficient munications.
•Improved QoSsupport • support multiple levels of hierarchy inside the
address space.
•Security support • Aggregation of prefixes announced in the global
•Mobility support routing table,efficient and scalable routing.
•etc. • Multiple simultaneous addresses for hosts .
• More flexibility, new functionalities.
• others...
中国电信集团公司(China Corporation) 3 中国电信集团公司(China Corporation) 4
Efficient routing Improved QoS support
•Simple packet header
•A new flow label inside the IP header.
–Extension headers
–No checksum at the IP layer. –Enables per flow processing for differentiation
at the IP layer.
–Routing extension header •IPv6 header is designed to optimize
•No recalculations by the routers. software implementation
•No packet segmentation in routers •But does not solve the QoSproblem
•Provides routing efficiency, pletely
and forwarding rate scalability. –Still under discussion
•Enables faster forwarding rate and end-
nodes