TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Network Protocols Internet Protocol version 6 (IPv6)

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Presentation transcript:

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Network Protocols Internet Protocol version 6 (IPv6)

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Motivation for IPv6 The overriding need was for a larger address space Other potentially useful things were done: simpler header format fragmentation by the network is not allowed header checksumming is no longer done multiple addresses and scopes per interface not fully ironed out how all this will be done Note, at this time, routing is essentially unchanged

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 IPv6 datagram format

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 IPv6 Options

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Fragmentation changes

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Changes to other protocols ICMP streamlined, combined with IGMP Upper layers need to know about IPv6 addresses New DNS record types (e.g. AAAA) RIP updated, RIPng OSPF updated, OSPFv3 DHCPv6

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 IPv6 transition When, if ever? 6Bone and tunneling Dual stacks Address translation Software/stack changes required

TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Transition issues Colon hexadecimal notation with 0's compression e.g. 2001:435:e201::1 IPv4 addresses can be encoded with 96 leading 0's e.g. :: Assignment and encoding strategies auto-configuration EUI-64 encoded (use MAC in host id portion) privacy extensions, geographical encoding, etc.