1. Matrix of transition mechanisms Ngtrans interim meeting - Redmond Alain Baudot alain.baudot@francetelecom.com

2. Context draft-krampell-v6transition-interaction-00.txt based on combination of 8 transition mechanisms => 8 x 8 = 64 cases New transition mechanisms have been defined! Up to 16 mechanisms are defined or under definition Combining all mechanisms with each other results in 256 cases !

3. How to reduce the combination matrix ? Each mechanism solves a particular transition issue – unlikely to reduce the number of mechanisms Need to find a new approach reducing the number of cases to check –Mechanism approach : stack, translation, tunneling –Scope approach : host, site, global

4. Classifying mechanisms Stack mechanisms Dual Stack: Host BIS: Host BIA: Host Translation mechanisms Socks: site SIIT: site NAT-PT: site TRT: site Proxy: site Tunneling mechanisms Configured tunnel: Host x Host Automatic tunnel: Host x Host + Global Tunnel broker: Host x Host + Global 6to4: Site x Site + Global 6over4: Host x Host + Site DSTM: Host x Host + Site

5. Mechanism approach –3 stack mechanisms –5 translation mechanisms –6 tunneling mechanisms StackTranslationTunneling Stack Translation Tunneling 3 15 18 10 1530 Total = 94 cases

6. Scope approach Host scope : enables the communication of a single host (8 mechanisms) Site scope : enables a whole site communication without effect on the Internet (8 mechanisms) Global scope : enables host or site communication with effect on the Internet (3 mechanisms) Local or parallel approach, not end-to-end Assumes that there are no interaction issues outside a scope hostsiteglobal host site global 3 Total : 59 cases 28

7. Conclusion Mechanism approach –exhaustive end-to-end approach Scope approach –more relevant –Local approach, not end-to-end –working together with draft-ngtrans-introduction-to- ipv6-transition-0x.txt