#acl All:read
<<TableOfContents>>
=  IPv6 configuration on Linux operating systems  =

==  How can I add IPv6 address to a specific interface?  ==

There are several ways to configure a new address to on interface:
 * {{{ip -f inet6 addr add }}}''IPV6_ADDRESS/MASK''{{{ dev }}}''INTERFACE_NAME''
or
 * {{{ifconfig}}} ''INTERFACE_NAME'' {{{add}}} ''IPV6_ADDRESS/MASK''


==  How can I remove IPv6 address from a specific interface?  ==

There are several ways to configure a new address to on interface (very similar to adding new address - just replacing add to del):
 * {{{ip -f inet6 addr del}}}'' IPV6_ADDRESS/MASK''{{{ dev }}}''INTERFACE_NAME''
or
 * {{{ifconfig}}} ''INTERFACE_NAME'' del ''IPV6_ADDRESS/MASK''

==  How can look at IPv6 routing table?  ==

There are several ways to do that:
 * {{{route -A inet6}}}
or
 * {{{netstat -A inet6 -r}}}
or
 * {{{ip -f inet6 route}}}

== How can I disable IPv6 on the Linux system ? ==
 Have look at [[IPv6hostslinux_disableIPv6| Disabling IPv6 on linux guide]]

=  Using Linux as a router  =

==  How can configure of Router ADVertisement Daemon (radvd) under Linux  ==

If we want to use  a Linux machine as an IPv6 router and provide stateless autoconfiguration information for clinets we need the Router ADVertisement Daemon ({{{radvd}}}). Luckily {{{radvd}}} is part of the major Linux distributions (Debian, !RedHat, SuSE), therefore installing it is straightforward.

The configuration of the daemon is stored in {{{/etc/radvd.conf}}} configuration files. You can configure
router advertisments per interfaces. You can configure more than one prefix per interfaces.

A sample comfiguration that answers to router solicitation messages on two VLANS (different prefixes):

{{{
 interface eth0.105
 {
   AdvSendAdvert on;
   prefix 2001:db8:6001:500::/64
   {
   };
 };
 interface eth0.60
 {
   AdvSendAdvert on;
   prefix 2001:db8:6001:3f00::/64
   {
   };
 };

}}}

= Can you help me with Linux distribution xyz? =
 * [[IPv6hostslinux_ubuntu| Ubuntu Linux configuration guide]]
 * [[IPv6hostslinux_fedora| Redhat/Fedora Linux configuration guide]]
 * Suse Linux configuration guide

= Which linux kernel version has broken IPv6? =
 * 2.6 kernel series
  * According to our and [[https://www.redhat.com/archives/fedora-test-list/2007-February/msg00285.html|some independent test]] you should avoid 2.6.19: seriously broken router advertisment/mutlicast handling. Use instead Linux kernel 2.6.20
 * 2.4 kernel series

= How can I setup 6to4 relay on Linux? =
 * [[Linux_6to4_konfiguráció| Linux 6to4 relay konfiguráció]]

= How can I setup NAT-PT box on Linux? =
 * [[http://tomicki.net/naptd.php|Use the naptd deamon]]