lect-12 - Next Generation IP (IPv6) ECE/CS 438 Fall 2011...

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ECE/CS 438 1 Next Generation IP (IPv6) ECE/CS 438 Fall 2011 Slides: Peterson & Davies
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Major Features n 128-bit addresses n Multicast n Real-time service n Authentication and security n Auto-configuration n End-to-end fragmentation n Enhanced routing functionality, including support for mobile hosts
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ECE/CS 438 3 IPv6 n History ¡ Next generation IP (AKA IPng) ¡ Intended to extend address space and routing limitations of IPv4 n Requires header change n Attempted to include everything new in one change ¡ IETF moderated n Based on Simple Internet Protocol Plus (SIPP)
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ECE/CS 438 4 IPv6 n Wish list ¡ 128-bit addresses ¡ Multicast traffic ¡ Mobility ¡ Real-time traffic/quality of service guarantees ¡ Authentication and security ¡ Autoconfiguration for local IP addresses ¡ End-to-end fragmentation ¡ Protocol extensions n Smooth transition! n Note ¡ Many of these functionalities have been retrofit into IPv4
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IPv6 Addresses n Classless addressing/routing (similar to CIDR) n Notation: x:x:x:x:x:x:x:x (x = 16-bit hex number) ¡ contiguous 0s are compressed: 47CD::A456:0124 ¡ IPv6 compatible IPv4 address: ::128.42.1.87 n Address assignment ¡ provider-based ¡ geographic
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IPv6 Header n 40-byte base header n Extension headers (fixed order, mostly fixed length) ¡ fragmentation ¡ source routing ¡ authentication and security ¡ other options
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ECE/CS 438 7 IPv6 Addresses n 128-bit ¡ 3.4 x 1038 addresses (as compared to 4 x 109 n Classless addressing/routing (similar to CIDR) n Address notation ¡ String of eight 16-bit hex values separated by colons n 5CFA:0002:0000:0000:CF07:1234:5678:FFCD ¡ Set of contiguous 0 s can be elided n 5CFA:0002::0000:CF07:1234:5678:FFCD n Address assignment ¡ Provider-based ¡ geographic 010 Region ID Provider ID Subscriber ID Subnet Host 3 m n o p 125-m-n-o-p
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lect-12 - Next Generation IP (IPv6) ECE/CS 438 Fall 2011...

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