CT320: Network and System Administration

Fall 2018

I Pv 6

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CT320 IPv6

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Motivation

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IPv6

IPv6 addresses

IPv6 Header

 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Version Traffic class Flow Label
Payload Length Next Header Hop Limit
Source IP address (128 bits)
Destination IP address (128 bits)

Other Changes from IPv4

Transition From IPv4 To IPv6

Tunneling

Send a packet from IPV6, in the future:

┌───┐   ┌───┐                                   ┌───┐   ┌───┐
│ A │···│ B │···································│ E │···│ F │
└───┘   └───┘           IPv6 Internet           └───┘   └───┘
IPv6    IPv6                                    IPv6    IPv6

In these primitive times:

┌───┐   ┌───┐   ┌───┐                   ┌───┐   ┌───┐   ┌───┐
│ A │···│ B │···│ C │···················│ D │···│ E │···│ F │
└───┘   └───┘   └───┘   IPv4 Internet   └───┘   └───┘   └───┘
IPv6    IPv6    IPv4                    IPv4    IPv6    IPv6

C & D are IPv4/IPv6 gateways, which wrap/unwrap the IPv6 packet in an IPv4 packet, much as a TCP packet is wrapped in an IP packet.

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Modified: 2018-06-22T00:09

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