I=E2=80=99= m using 'rdisc6 <starlink interface>' every 150 seconds to keep = starlink sending RAs and keep my main v6 address alive as well, so far = it hasn=E2=80=99t changed at all in ~48 hours.

On May = 18, 2021, at 9:50 AM, Annika Wickert <aw@awlnx.space> wrote:

That = could be the reason, yes. Some times I get France as = Groundstation.

On 18. = May 2021, at 16:48, Nick Buraglio <buraglio@forwardingplane.net> wrote:

I suspect it is due to roaming between ground stations, = but I am totally guessing.

nb

=E1=90=A7

On Tue, May = 18, 2021 at 6:41 AM Annika Wickert <aw@awlnx.space> wrote:
My lease time is also at 5min, I am in Germany = close to Munich.

Maybe= it stops changing when my pole mount finally arrives and I get a more = stable connection.

On 18. = May 2021, at 13:37, Nick Buraglio <buraglio@forwardingplane.net> wrote:

Interesting. My = lease time is set to 5m(!!!) but it=E2=80=99s only changed once in about = 2 months. Where are you located?

nb

On Tue, May 18, 2021 at 3:33 AM Annika Wickert = <aw@awlnx.space> wrote:
I got dhcpv6-pd running some time ago with = wide-dhcpv6 and the following settings:

profile default
{
  information-only;

  request domain-name-servers;
  request domain-name;

  script "/etc/wide-dhcpv6/dhcp6c-script";
};

interface eth0 {
  send ia-pd 0;
  send ia-na 0;
};

id-assoc na 0 {
};

id-assoc pd 0 {
  prefix-interface wlan0 {
=   sla-len 8;
=   sla-id 1;
=   };
=   prefix-interface eth0.222 {
=   sla-len 8;
=   sla-id 2;
=   };

};

To = request my IPv6 /64 on my WAN interface I run the following every two = minutes, otherwise I lose the address:
/bin/rdisc6 = -v eth0

With = this v6 works very good and I have no issues at all.

But prefixes change = every 24 hours or so

Best,
Annika

On 17. May 2021, at 21:15, Dave = Taht <dave.taht@gmail.com> wrote:

On Mon, May 17, = 2021 at 12:04 PM Nick Buraglio <nick@buraglio.com> = wrote:

As discussed privately with = Dave, I have removed the starlink provided
router and = replaced it with a Mikrotik RB2011 to allow for more

Running = routerOS? Latest beta's of that have cake in 'em.

granular control, and to better tie into = my existing network.

Starlink = provides a router, also? I'm so confused. I thought the dishy
was all there = was. Care to tear it apart and describe what's in it?

This has
allowed me to make = a dhcpv6-pd request that is reasonably stable (so
far it = has changed once in the last 2 months). The lease time is
incredibly short, which is a little strange but as long as = the DHCPv6
server is the same and remains unchanged, it = should just hand out the
same prefix upon request.

That was a = terrible habit that comcast had got into in the early days
that = forced
openwrt to flush = and reload the firewall every minute, or less.

I'd pioneered a = stateless firewall in cerowrt that never ever ever
needed to reload = the
rules, using a = pattern match for each specifically renamed ethernet = interface.

Regrettably that = was not accepted into openwrt, because "nftables" was
just around the = corner.
It scaled = beautifully to tons of interfaces going up and down so long
as they were = named appropriately,
at far less cpu = overhead for complicated rules than the standard
openwrt = firewall.

https://www.bufferbloat.net/projects/cerowrt/wiki/CeroWall/?ver= sion=3D9

Anyway, I don't = remember all that we did to suppress the flood of
useless static = changes
to everything = ipv6, but I hope that whatever we ended up doing still
works in this = case.

I also built a very crude measurement = display that just uses curl get
and dig via smokeping to = display reasonable RTT. It's detailed in the
reddit post = here:
https://www.reddit.com/r/Starlink/comments/mykxjv/functional_ip= v6_and_some_crude_starlink_latency/
and can be viewed = directly here:
https://starmon.qosbox.com/

THX! We really = need to collect the "good" information and publish it
somewhere, the = reddit noise level is too high.

One piece of = mis-information I think was the news you can "route"
packets over = ipv4 with a box in front of it and
a default gw of = 192.168.100.1 Not clear from that news whether or not
NAT was required = on the next hop or not... ?

(that's from = another reddit post I mis-remember)

Making dhcpv6-pd work is = pretty standard:

/ipv6 dhcp-client

add add-default-route=3Dyes interface=3Dether2 = pool-name=3Dstarlink-ipv6
prefix-hint=3D::/56 = request=3Dprefix

On each interface you want = to have IPv6 on:

/ipv6 address

add address=3D::1 from-pool=3Dstarlink-ipv6 = interface=3Dbridge.8

add address=3D::1 = from-pool=3Dstarlink-ipv6 interface=3Dbridge.6

THANKS SO MUCH. = I am thinking at the moment that openwrt's dhcp-pd
implementation = is currently
broken (it's not = working on admittedly a comcast modem I just got that
I'd not used = before), but
as soon as I get = a chance I'll try configuring odhcpd6 to do something
like this. If I = can remember how.

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--
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Dave T=C3=A4ht = CTO, TekLibre, LLC
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