1. IPv6 Keith Thompson

2. IPv4 We currently use IPv4 as the widely adopted standard for an Internet Protocol. We currently use IPv4 as the widely adopted standard for an Internet Protocol. Ver. 4 has been around since late 70’s Ver. 4 has been around since late 70’s Uses 32-bit addresses ie: 128.193.736.445 Uses 32-bit addresses ie: 128.193.736.445 Used by P.C.s, Supercomputer systems, ATM systems. Used by P.C.s, Supercomputer systems, ATM systems.

3. Why a new protocol? Main reason: Shortfalls in ver. 4’s addressing scheme Version 4 supports 4,294,967,295 theoretical unique addresses. Version 4 supports 4,294,967,295 theoretical unique addresses. Some experts say that we are reaching the useable limit of the current 32-bit architecture. Some experts say that we are reaching the useable limit of the current 32-bit architecture. We need more addresses to supply growth in hardware market and new technologies We need more addresses to supply growth in hardware market and new technologies

4. IPv6 Uses 128-bit addresses Uses 128-bit addresses Address delineated with semicolons Address delineated with semicolons eight four-digit hexadecimal integers ie: 1fff:9f3e:ba26:c08d:bb52:03aa:92fa:b2af eight four-digit hexadecimal integers ie: 1fff:9f3e:ba26:c08d:bb52:03aa:92fa:b2af Not case sensitive Not case sensitive 3X10^38 theoretical addresses 3X10^38 theoretical addresses No more “scarce addresses” problem No more “scarce addresses” problem

5. IPv6 data overhead Low data overhead Low data overhead Critical for wireless devices (bandwidth) Critical for wireless devices (bandwidth) Use of optional header fields Use of optional header fields Less constrained to preset size and data contents allowing more packet features (authentication, encryption…) Less constrained to preset size and data contents allowing more packet features (authentication, encryption…) Overall overhead size approx. doubled Overall overhead size approx. doubled

6. IPv6 auto-configuration Auto-configuration made more robust, and simple Auto-configuration made more robust, and simple Allows certain devices to get IP without the help of a server (like DHCP) Allows certain devices to get IP without the help of a server (like DHCP) Allows devices an “always on” connection (mobile devices, car internet) Allows devices an “always on” connection (mobile devices, car internet)

7. IPv6 implementation Implementation presents problem Implementation presents problem Planned roll out of ver. 6 or smooth transition? Planned roll out of ver. 6 or smooth transition? Version 6 designed with backward compatibility with ver. 4 Version 6 designed with backward compatibility with ver. 4 This means to can co-exist indefinitely This means to can co-exist indefinitely

8. IPv6 future Currently, IPv4 is still standard Currently, IPv4 is still standard ISP’s have been slow to adopt (profitability, demand) Spain has a few select IPv6 ISP’s ISP’s have been slow to adopt (profitability, demand) Spain has a few select IPv6 ISP’s Some software is on market already Some software is on market already Military uses IPv6 (DOD, Navy), Military uses IPv6 (DOD, Navy), Government mandates agencies by July, 2008. Government mandates agencies by July, 2008. China, Europe have plans to implement soon China, Europe have plans to implement soon

9. IPv6 future Changeover takes new routers, switches, OS’s. Changeover takes new routers, switches, OS’s. Adoption has been slower than many thought Adoption has been slower than many thought Standard in next decade? Standard in next decade?