Link-local

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Link-local is the term used to designate the automatic configuration of layer 3 IP adresses which is used in both IPv4 and IPv6. IPv4 addresses are in the range from 169.254.1.0 to 169.254.254.255 when no other IP addressing assignment is available, e.g. no connectivity to a DHCP server.

Contents

[edit] IPv4

Based on RFC 3927, IPv4 uses the 169.254.* (link-local) set of addresses. In the RFC the technique for IPv4 is called IPv4 Link-Local (IPV4LL). Microsoft refers to this as Automatic Private IP Addressing (APIPA) or Internet Protocol Automatic Configuration (IPAC).

[edit] IPv6

For IPv6 autoconfigration is based on RFC 2462.

[edit] Stateless autconfiguration

Allows an IPv6 host to obtain a unique address using the IEEE 802 MAC address.

[edit] Stateful autoconfigration

An IPv6 host uses a DHCPv6 server which keeps a record of the IP address and other configuration information for the host.

[edit] Combined Stateless and Stateful

Used with the Managed Address Configuration and Other Stateful Configuration flags in the ICMPv6 Router Advertisement messages.

[edit] See also

[edit] External links

  • RFC 3484 — default Address Selection for Internet Protocol version 6 (IPv6)


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