First page Back Continue Last page Overview Graphics
Transition Scenario
IPv6 has been designed with a long transition period in mind
- No “D-Day” for deployment
- Coexistence of IPv4 and IPv6
IPv6 has many transition mechanisms
- Tunneling (static, automatic, brokers)
- DSTM
- 6to4
- ISATAP
- Toredo
- Dual-stack
- NAT-PT
Notes:
IPv6 has been originally proposed in 1996, and for a long time to come will not be the dominant protocol of the Internet. There is no D-day that mandates deployment, instead there are a numerous transition strategies designed to allow the coexistence of IPv4 and IPv6.
The applicability of the different transition strategies varies, but today’s presentation concentrates on NAT-PT, a mechanism that allows you to move your networks to IPv6 and start taking advantage of it while maintaining the ability to communicate with the rest of the IPv4 world. NAT-PT has been designed to minimize the administrative burden of moving to IPv6. It allows you to drop IPv4 from your internal network completely and focus on using IPv6. In IPv6 to IPv4 communications all your traffic passes through NAT-PT, which it is still a NAT with all the evils it brings, but if you have been using one all along then you are used it. On the other hand you now have IPv6 connectivity and are on your way to abolishing NAT completely.