From Fedora Project Wiki
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* Automatic link-local addresses
* Automatic link-local addresses
* Manual addresses
* Manual addresses
* Automatic global addresses
* Automatic global address
* Gateway for other hosts
* IPv4: Gateway/DNS for other hosts
 
=== Dependencies ===
 
* IPv6: Automatic global address needs link-local address
* Gateway needs a manual address (at least a default one), conflicts with dynamic address
 
=== Possibilities ===
 
{|
!L!!M!!A!!G!!IPv4!!IPv6!!notes
|- style="color: blue"
|no||no||no||no||disabled||unsupported||
|- style="color: grey"
|no||no||no||yes||invalid||invalid||missing manual address
|- style="color: green"
|no||no||yes||no||auto||invalid||missing IPv6 link-local address
|- style="color: grey"
|no||no||yes||yes||invalid||invalid||missing manual address
|- style="color: red"
|no||yes||no||no||manual||unsupported||missing kernel feature
|- style="color: red"
|no||yes||no||yes||shared||unsupported||missing kernel feature
|- style="color: red"
|no||yes||yes||no||auto||unsupported||missing kernel feature
|- style="color: grey"
|no||yes||yes||yes||invalid||invalid||both sides of dynamic configuration
|- style="color: green"
|yes||no||no||no||link-local||link-local||
|- style="color: grey"
|yes||no||no||yes||invalid||invalid||missing manual address
|- style="color: blue"
|yes||no||yes||no||unsupported||auto||
|- style="color: grey"
|yes||no||yes||yes||invalid||invalid||missing manual address
|- style="color: blue"
|yes||yes||no||no||unsupported||manual||
|- style="color: blue"
|yes||yes||no||yes||shared||unsupported||
|- style="color: blue"
|yes||yes||yes||no||unsupported||auto||
|- style="color: grey"
|yes||yes||yes||yes||invalid||invalid||both sides of dynamic configuration
|}
 
* L: Automatic link-local addresses
* M: Manual addresses
* A: Automatic global address
* G: Gateway/DNS for other hosts


== Current status ==
== Current status ==

Revision as of 09:16, 19 October 2013

Features

  • Automatic link-local addresses
  • Manual addresses
  • Automatic global address
  • IPv4: Gateway/DNS for other hosts

Dependencies

  • IPv6: Automatic global address needs link-local address
  • Gateway needs a manual address (at least a default one), conflicts with dynamic address

Possibilities

L M A G IPv4 IPv6 notes
no no no no disabled unsupported
no no no yes invalid invalid missing manual address
no no yes no auto invalid missing IPv6 link-local address
no no yes yes invalid invalid missing manual address
no yes no no manual unsupported missing kernel feature
no yes no yes shared unsupported missing kernel feature
no yes yes no auto unsupported missing kernel feature
no yes yes yes invalid invalid both sides of dynamic configuration
yes no no no link-local link-local
yes no no yes invalid invalid missing manual address
yes no yes no unsupported auto
yes no yes yes invalid invalid missing manual address
yes yes no no unsupported manual
yes yes no yes shared unsupported
yes yes yes no unsupported auto
yes yes yes yes invalid invalid both sides of dynamic configuration
  • L: Automatic link-local addresses
  • M: Manual addresses
  • A: Automatic global address
  • G: Gateway/DNS for other hosts

Current status

Table of IPv4/IPv6 methods

Method Protocol Link-local Manual Automatic Gateway
disabled IPv4 none forbidden none none
ignore IPv6 kernel forbidden kernel none
link-local IPv4 userspace forbidden none none
link-local IPv6 kernel forbidden none none
manual IPv4 none required none none
manual IPv6 kernel required none none
auto IPv4 none allowed dhcp none
auto IPv6 kernel allowed ra+dhcp none
dhcp IPv6 kernel allowed dhcp none
shared IPv4 none ? none dhcp+dns+NAT

Notes

  • Even when IPv4 is in the disabled state, the network interface communicates on the L2 level.
  • There's no disable method for IPv6 and its semantics is unclear (whether disable means the same as link-local, or it also applies to the link-local address which is unaffected in all other methods).
  • The usage of IPv4 and IPv6 link-local addresses substatially differs. While IPv6 uses link-local addresses for *all* methods, IPv4 only uses it for the special link-local method.
  • The IPv4 disable and IPv4/manual methods only differ in the number of addresses (0 versus >=1), therefore one of them is redundant.
  • The IPv6 link-local and IPv6/manual methods only differ in the number of addresses (0 versus >=1), therefore one of them is redundant.
  • The IPv6 dhcp method is currently defunct.
  • There's no IPv6 shared method, yet.
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