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diff --git a/docs/nptv6.rst b/docs/nptv6.rst deleted file mode 100644 index f4e08325..00000000 --- a/docs/nptv6.rst +++ /dev/null @@ -1,69 +0,0 @@ -.. include:: _include/need_improvement.txt - -.. _nptv6: - -##### -NPTv6 -##### - -:abbr:`NPTv6 (Network Prefix Translation)` is a form of NAT for IPv6. It's -described in :rfc:`6296`. - -**Usage** - -NPTv6 is very useful for IPv6 multihoming. It is also commonly used when the -external IPv6 prefix is dynamic, as it prevents the need for renumbering of -internal hosts when the extern prefix changes. - -Let's assume the following network configuration: - -* eth0 : LAN -* eth1 : WAN1, with 2001:db8:e1::/48 routed towards it -* eth2 : WAN2, with 2001:db8:e2::/48 routed towards it - -Regarding LAN hosts addressing, why would you choose 2001:db8:e1::/48 over -2001:db8:e2::/48? What happens when you get a new provider with a different -routed IPv6 subnet? - -The solution here is to assign to your hosts ULAs_ and to prefix-translate -their address to the right subnet when going through your router. - -* LAN Subnet : fc00:dead:beef::/48 -* WAN 1 Subnet : 2001:db8:e1::/48 -* WAN 2 Subnet : 2001:db8:e2::/48 - -* eth0 addr : fc00:dead:beef::1/48 -* eth1 addr : 2001:db8:e1::1/48 -* eth2 addr : 2001:db8:e2::1/48 - -VyOS Support -^^^^^^^^^^^^ - -NPTv6 support has been added in VyOS 1.2 (Crux) and is available through -`nat nptv6` configuration nodes. - -.. code-block:: none - - set rule 10 source prefix 'fc00:dead:beef::/48' - set rule 10 outbound-interface 'eth1' - set rule 10 translation prefix '2001:db8:e1::/48' - set rule 20 source prefix 'fc00:dead:beef::/48' - set rule 20 outbound-interface 'eth2' - set rule 20 translation prefix '2001:db8:e2::/48' - -Resulting in the following ip6tables rules: - -.. code-block:: none - - Chain VYOS_DNPT_HOOK (1 references) - pkts bytes target prot opt in out source destination - 0 0 NETMAP all eth1 any anywhere 2001:db8:e1::/48 to:fc00:dead:beef::/48 - 0 0 NETMAP all eth2 any anywhere 2001:db8:e2::/48 to:fc00:dead:beef::/48 - 0 0 RETURN all any any anywhere anywhere - Chain VYOS_SNPT_HOOK (1 references) - pkts bytes target prot opt in out source destination - 0 0 NETMAP all any eth1 fc00:dead:beef::/48 anywhere to:2001:db8:e1::/48 - 0 0 NETMAP all any eth2 fc00:dead:beef::/48 anywhere to:2001:db8:e2::/48 - 0 0 RETURN all any any anywhere anywhere - -.. _ULAs: https://en.wikipedia.org/wiki/Unique_local_address |