IPv6 - Internet protocol of Next Generation

• http://www.routemeister.net/projects/sipcalc/index.html

 sudo apt-get install sipcalc

Version: 0.1.0, 2007-09-08
Philipp Kolmann <philipp at kolmann.at>

Since 2.6.19 linux has support for CONFIG_IPV6_MULTIPLE_TABLES (Support multiple routing tables) and since 2.6.20 CONFIG_IPV6_SUBTREES (Enable routing by source address or prefix).

With this infrastructure it is possible to have multiple IPv6 addresses on different subnets (read differnet SixxS tunnels to different POPs) working. With a normal setup, you would end up with one default route and route all traffic through this link.

My setup is the following:

One SixxS tunnel Maribor, Slovenia (sixxs-si), and one to Hamburg, Germany (sixxs-de).

First added a new table to /etc/iproute2/rt_tables:
echo "100 sixxs" >> /etc/iproute2/rt_tables

In /etc/network/interfaces I have the following setup (Static IPv4 Adress):

auto sixxs-si
iface sixxs-si inet6 v4tunnel
  address 2001:1::2
  netmask 64
  endpoint 212.18.63.73
  ttl 64
  up ip link set mtu 1280 dev sixxs-si
  up ip route add default via 2001:1::1 dev sixxs-si

auto sixxs-de
iface sixxs-de inet6 v4tunnel
  address 2001:ffff::2
  netmask 64
  endpoint 212.224.0.188
  ttl 64
  up ip link set mtu 1280 dev sixxs-de
  up ip -6 rule add from 2001:ffff::2 table sixxs
  up ip -6 route add default via 2001:ffff::1 table sixxs
  down ip -6 rule del table sixxs
  down ip -6 route flush table sixxs

IPv6 adresses are not the actual ones.