8: IP version 6
- Page ID
- 11017
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- 8.8: IPv6 Host Address Assignment
- IPv6 provides two competing ways for hosts to obtain their full IP addresses. One is DHCPv6, based on IPv4’s DHCP, in which the entire address is handed out by a DHCPv6 server. The other is StateLess Address AutoConfiguration, or SLAAC, in which the interface-identifier part of the address is generated locally, and the network prefix is obtained via prefix discovery.
- 8.15: IPv6-to-IPv4 Connectivity
- What happens if you switch to IPv6 completely, perhaps because your ISP (or phone provider) has run out of IPv4 addresses? Some of the time – hopefully more and more of the time – you will only need to talk to IPv6 servers. For example, the DNS names facebook.com and google.com each correspond to an IPv4 address, but also to an IPv6 address (above). But what do you do if you want to reach an IPv4-only server? Such servers are expected to continue operating for a long time to come.