IPv6

IPv6 is not compatible with IPv4.

Address is assign to interface.

Interface has more addresses: e.g. loopback, multicast, local link, global, ...

The length of header is constant. It can use extends header. Extend header have specified order.

Don´t use checksum.

Kinds of address:

unicast

for interface

multicast

for group of computer

anycast

for first computer in group

Don´t use broadcast. In place of broadcast it use multicast.

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Notation of IPv6 address

IPv4

147.230.49.73

length 32b

4 x 8b

decimal

IPv6

fedc:ba98:7654:3210:fedc:ba98:7654:3210

length 128b

8 x 16b

hexadecimal

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Shortening IPv6 address

• 0123:0000:0000:0000:fedc:ba98:7654:3210
• 123:0:0:0:fedc:ba98:7654:3210
• 123::fedc:ba98:7654:3210 (allow only one "::" in address)

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Mapping IPv4 address to IPv6

147.230.49.73

::ffff:93e6:3149 (147=>93, 230=>e6, 49=>31, 73=>49)

::ffff:147.230.49.73

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Range of IPv6

• ::1/128 loopback
• 2000::/3 Global Unicast
• FC00::/7 Unique Local Unicast
• FE80::/10 Link Local Unicast
• FF00::/8 Multicast

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Global Unicast

|_ _ _|_|_ _ _ _|

48b - Public NET topology (from provider)

16b - Local SUBNET topology (your net)

64b - Interfaces (your interfaces)

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Automatic IPv6 configuration

1. Create local link address from MAC address. (fe80::/10 + MAC)
2. Check collision.
3. Waiting for router info about networks or ask about router.
4. Set network parameters.

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Security

Ipv6 mandatory use IPsec. It offers authentication, encryption, tunnelling.