1. 1 v4v6 Transition Cable Use Cases 2010 Sept 20

2. 2 Overview Focus only on cable access network Access network can be IPv4-only, native dual-stack and IPv6-only Provide dual-stack to users over different type of access networks Five use cases we discuss: –IPv4-only –Native Dual-Stack –Native Dual-Stack with shard Public IPv4 –IPv6-only shared Public IPv4 Address –IPv6-only with Dedicated Public IPv4 Address Each use case the use cases why and what technology is chosen

3. 3 IPv4-only Use Case Access Network is IPv4-only Give users IPv6 access to jumpstart the transition Minimum cost to the network Technology chosen in the use case is 6rd

4. 4 Native Dual-Stack Use Case Access Network is dual-stack Simplest model IPv6 Address Architecture Require network, provisioning system and support systems to be upgraded to IPv6 User Prefix Advertisement

5. 5 Native Dual-Stack w/Shared IPv4 Use Case Access Network is dual-stack IPv6 Address Architecture Require network, provisioning system and support systems to be upgraded to IPv6 User Prefix Advertisement Requires Provider Translation Function (CGN/NAT44)

6. 6 IPv6-only shared Pub IPv4 Use Case Access Network is IPv6-only Operator has completed the IPv6 network upgrade Users share IPv4 addresses to access v4 services Technology chosen in the use case is DS-lite

7. 7 IPv6-only with Dedicated Pub IPv4 Use Case Similar to the previous use case Users want to have a public IPv4 address to ease the network NAT problem Technology chosen in this use case is 4over6