====== IPv6 ======


| ff::/8 | multicast | ff0x is reserverd |
| ff01::1 | multicast | all nodes | interface local |
| ff02::1 | multicast | all nodes | link local | ping ff02::1%tun2 |
| ff01::2 | multicast | all routers | interface local |
| ff02::2 | multicast | all routers | link local |
| ff03::2 | multicast | all routers | site local |
| fe80::/10 | link local address |
| fc00::/7 | Unique Local Address (ULA) | fc00::/7 and fd00::/7 |
| 2000:: | Global address | first |
| 3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff | Global address | last |

<file | /etc/network/interfaces>
iface eth0 inet dhcp
iface eth0 inet6 static
  address 2001::2
  netmask 64
  up -ip -6 route add ::/0 via 2001::1 dev eth0 
  down ip -6 route del ::/0 via 2001::1 dev eth0
</file>

====== Autoconfig and RA ======

[[http://strugglers.net/~andy/blog/2011/09/04/linux-ipv6-router-advertisements-and-forwarding/]]

Auto configuration can be disabled temporary for eth1 with:

<code bash>
sudo sysctl -w net.ipv6.conf.eth1.autoconf=0
sudo sysctl -w net.ipv6.conf.eth1.accept_ra=0
</code>

or for all interfaces with:

<code bash>
sudo sysctl -w net.ipv6.conf.all.autoconf=0
sudo sysctl -w net.ipv6.conf.all.accept_ra=0
</code>

Reenabling works by using 1 instead of 0 in the call.

====== RADVD ======

>**R**outer **ADV**ertisement **D**aemon. This daemon listens to router solicitations (RS)
>and answers with router advertisement (RA). Furthermore unsolicited RAs are also sent from time to time.

>This protocol is meant for host auto-configuration and not for route propagation between routers.