Re: [Starlink] Info on IP country ranges

[Alexandre Petrescu <alexandre.petrescu@gmail.com>]

Steven,

Thanks for the clarifications. It is indeed very advantageous to use 
DHCPv6-PD from a Client in home to starlink Server, and obtain a /56.

But to be native IPv6, it would need the IPv6 packets to travel natively 
(sit directly on the link layer) between home and starlink network.  If 
these IPv6 packets are encapsulate in IPv4, then there would be a risk 
of additional latency compared to v4.

A possible way to find out whether it's IPv6 native (and hence no 
additional latency) is to browse speedtest.net from an IPv4-only client 
vs from an IPv6-only client.  An IPv6-only Windows client can be made by 
unchecking the IPv4 box in interface Properties window.

Ideally, if it is IPv6 native, the latency reported by speedtest.net is 
approximatively the same on IPv4 vs on IPv6 (sometimes the IPv6 latency 
is even lower than on IPv4).  If the latency reported on IPv6 is higher 
than on IPv4 it could be for many reasons, and one of them could be that 
IPv6 is not native, but encapsulated in IPv4.  The IPv4 encapsulating 
endpoint could be on Dishy.

Alex

Le 08/12/2023 à 13:24, Steven a écrit :
> Alexandre,
>
>> Are you sure the DHCPv6-PD server is in Starlink network and not on the
>> MikroTik router?
> That would be quite the unusual setup, and even so would require that I obtain said /56 from elsewhere (such as via a tunnel) to then delegate back to myself...
>
>> It could be that the MikroTik router runs tunnelbroker, obtains a /56
>> from HE, splits that /56 into multiple /64s and puts it on the DHCPv6-PD
>> local server config files.
> I am confident this is not the case since I configured these routers from scratch.
>
>> It could also be that the DHCPv6-PD server is run on the Dishy.
> It is unlikely that it is on the Dishy, as the latency to the DHCPv6 servers IP address, as well as the first IP hop, indicates the usual Ground->Space->Ground latency I'd expect.
>
>> It could also be that the DHCPv6-PD server is run on the starlink ground
>> network: maybe on the teleport, maybe deeper on the starlink network.
> Yes, this is the most likely place they are running this, likely the PoP you are being routed through.
>
>> Do you know the IPv6 address of your DHCPv6-PD Server?
> The DHCPv6 server address is a Starlink IPv6 address, the same one as my default gateway (`2406:2d40:xxx:xxx::1`). The /56 I am being allocated is also from the same /32 as this DHCPv6 server, with the /32 being 2406:2d40::/32, which you'll note is allocated to Starlink.
>
> Cheers,
> Steven