1. Special SubjectIPv6 Addressing Morten Jørgensen 2. semester Network

2. Overview Addressing Unicast (Individual) Multicast (Group) Anycast (Selective ) Required Addresses and Address Selection Real World Address Demo Questions

3. Addressing Essentials DNS is important Manual typing sequence of all-zero groups can be replaced by pair of colons Loopback address = 0:0:0:0:0:0:0:1 = ::1 IPv6 supports three different address types for which the delivery process varies: Unicast (individual) Multicast (group) ( Broadcast ) (ff02::1) Anycast (selective)

4. Unicast This is the most important address type because unicast addresses are the “normal” addresses identifying the common computers, printers and other devices connected to the network. Unicast is defined in RFC 3587 The unicast address structure contains just three parts - global routing prefix, subnet ID, and interface ID. Not all unicast addresses are global. Some of them are limited just to a single physical (layer 2) network.

5. Multicast There is a separate part of the IPv6 address space dedicated to multicast. It is identified by the prefix ff00::/8. So every multicast address starts with “ff” which makes them easy to distinguish.

6. Anycast There is no separate part of the address space dedicated for Anycast Anycastare living in the unicastspace Security How do we protect anycast groups from intruders falsely declaring themselves to be holders of given anycast addresses and stealing the data or sending false responses

7. Required Addresses and Address Selection Every interface has just a single address in IPv4. IPv6 is different. ( More addresses to same netcard )

8. Real-world Addresses

9. Demo I DO PING

10. Questions