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Network Plus IPv6 Addressing Concepts

Network Plus IPv6 Addressing Concepts. IPv6 Addresses. Not compatible with IPv4 128-bit address 8 16-bit fields specified as 4 hex digits (0 – F) separated by colons. Leading zeros unnecessary :: may be used to specify a number of zero-value fields.

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Network Plus IPv6 Addressing Concepts

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  1. Network PlusIPv6Addressing Concepts

  2. IPv6 Addresses • Not compatible with IPv4 • 128-bit address • 8 16-bit fields specified as 4 hex digits (0 – F) separated by colons. • Leading zeros unnecessary • :: may be used to specify a number of zero-value fields. • FF22:00FF:002D:0000:0000:0000:3012:CCE3 = • FF22:FF:2D::3012:CCE3 • The substitution of :: for multiple zero-value fields can only be used once.

  3. IPv6 Address Scopes • Unicast address (link-local) • FE80: … (link-local – packet not routable) • 1111 1110 10 (“FE8”, “FE9”, “FEA” or “FEB”) • FEC0:.. (site-local– not routable on public Internet) • 1111 1110 11 (“FEC”, “FED”, “FEE” or “FEF”) • Nnnn: (Internet) • Multicast • Send to all computers in a multi-cast group • FF0x: … (x represents the multicast group) • Anycast address • Standard unicast address assigned to multiple machines • Used with routers to all nearest router to accept the packet • Packet can be accepted by first available device

  4. IPv6 Address Types

  5. Link Scope

  6. Aggregatable Global Address • Used on Public Internet routers • Designed from its foundation to support efficient, hierarchical addressing and routing • Summarized to produce an efficient routing infrastructure • Start with 001 in first three bits. (2:: or 3::)

  7. IPv6 Subnetting • Does not use Classes – every IPv6 address is classless • No subnet masks • First 64-bits network id (Subnet Prefix) and last 64-bits is the interface id. • Interfaces that share subnet prefix on same subnet

  8. Route Prefix • Interfaces that belong to same route • Vary in length defined by “/” • 2608:FE10::/32 • Example: • National NSP assigns regional ISP 32-bit route: 2608:FE10::/32 • Regional ISP assigns a local ISP a 48-bit route block prefix: 2608:FE10:1::/48 • Local ISP assigns business 2608:FE10:1:A::/64

  9. The End

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