= Сообщение: 6698 из 7402 ============================================= IPV6 = От : Victor Sudakov 2:5005/49 29 Jun 21 21:43:24 Кому : Alexey Vissarionov 29 Jun 21 21:43:24 Тема : Two ISPs and backup for a home network (dual-homing) FGHI : area://IPV6?msgid=2:5005/49+60db3242 На : area://IPV6?msgid=2:5020/545+60da34cd = Кодировка сообщения определена как: CP866 ================================== Ответ: area://IPV6?msgid=2:5020/545+60dbd819 ============================================================================== Dear Alexey,
28 Jun 21 23:45, you wrote to me:
VS>> What if I had two IPv6-capable ISPs for my home, and a /64 or a VS>> /56 from each of them? Is it possible to setup a backup link this VS>> way?
AV> 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?
AV> This is the preferred mode of operation, but it has (only) two AV> disadvantages: 1. All hosts in the LAN must be able to do the AV> switching|balancing on thy own (that means, run Linux; the BSD-style AV> networking stack, like the one used in Windoze, has very limited AV> functionality). 2. This may require some manual configuration on every AV> of them. Not really a problem, but may be boring.
This is not feasible because most of those LAN hosts are smartphones, smart TVs, vacuum cleaners, cameras and other IoT devices.
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 VS>> always the same. Can anyone enlighten me?
AV> This is second option, but you'd lose the main advantage of IPv6: the AV> use of publicly routed addresses.
Indeed. I don't like the idea of using NAT in IPv6 even if I could. So what's the solution?
