11-NL-IPv6 - 1 I Pv6 2 I Pv6 • Problem 32-bit address...

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Unformatted text preview: 1 I Pv6 2 I Pv6 • Problem: 32-bit address space will be completely allocated by 2008. • Solution: Design a new I P with a larger address space, called the I P version 6, I Pv6 – Expanded Address Space: 128-bit addresses – I P Address Auto-configuration: Stateless (no servers) host I P Address Configuration (Plug-and-Play) – Security Capabilities: I PSec required – Better and hierarchical routing mechanisms: Current I Pv4 routing infrastructure is a combination of flat and hierarchical routing. Leads to bigger routing tables at the backbone routers. – I mproved Options Mechanism: Options are located between the I Pv4 main header and transport headers. Most routers do not examine these option fields 3 I Pv6 Addressing • 128-bit addresses • I Pv4 – dotted decimal representation – 223.1.1.1 • I Pv6 – 128-bit address divided along 16-bit boundaries, each 16-bit block converted to a 4 digit hexadecimal number separated by colons – 0010000111011010 0000000011010011 0000000000000000 0010111100111011 – 21DA:00D3:0000:2F3B:02AA:00FF:FE28:9C5A – Can be simplified by removing leading 0’s within each 16-bit block – 21DA:D3:0:2F3B:02AA:FF:FE28:9C5A 4 I Pv6 Addressing – Compressing 0’s • Some type of addresses contain long sequences of 0s. To further simplify the representation of I Pv6 addresses, a contiguous sequence of 16-bit blocks set to 0 in the colon format can be compressed to...
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11-NL-IPv6 - 1 I Pv6 2 I Pv6 • Problem 32-bit address...

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