= Сообщение: 6694 из 7402 ============================================= IPV6 = От : Alexey Vissarionov 2:5020/545 28 Jun 21 23:45:00 Кому : Victor Sudakov 28 Jun 21 23:45:00 Тема : Two ISPs and backup for a home network (dual-homing) FGHI : area://IPV6?msgid=2:5020/545+60da34cd На : area://IPV6?msgid=2:5005/49+60d9d79a = Кодировка сообщения определена как: CP866 ================================== Ответ: area://IPV6?msgid=2:5001/100.1+60da4769 Ответ: area://IPV6?msgid=2:5005/49+60db3242 ============================================================================== Good ${greeting_time}, Victor!
28 Jun 2021 21:07:18, you wrote to All:
VS> What if I had two IPv6-capable ISPs for my home, and a /64 or a /56 VS> from each of them? Is it possible to setup a backup link this way?
Yes.
VS> I know that my home router can advertise multiple global IPv6 VS> prefixes into the LAN, but how will LAN hosts failover to the VS> backup gateway if the primary ISP fails? They will have IPv6 VS> addresses from both blocks, which should they choose for their VS> outgoing src address?
This is the preferred mode of operation, but it has (only) two disadvantages: 1. All hosts in the LAN must be able to do the switching|balancing on thy own (that means, run Linux; the BSD-style networking stack, like the one used in Windoze, has very limited functionality). 2. This may require some manual configuration on every of them. Not really a problem, but may be boring.
VS> With two IPv4 ISPs and NAT, the setup is rather trivial, outgoing VS> connections will work via either of the ISPs because the hosts VS> needn't be aware of the failure, and their src private IP is always VS> the same. Can anyone enlighten me?
This is second option, but you'd lose the main advantage of IPv6: the use of publicly routed addresses.
-- Alexey V. Vissarionov aka Gremlin from Kremlin gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii
... god@universe:~ # cvs up && make world --- /bin/vi * Origin: ::1 (2:5020/545)
