Re: ipv6 gateway on different subnet

[Christof Meerwald <cmeerw%cmeerw.org@localhost>]

On Tue, Jan 21, 2025 at 08:31:58PM -0600, Peter Miller wrote:
> On Tue, 21 Jan 2025 08:01:48 +0100
> Christof Meerwald <cmeerw%cmeerw.org@localhost> wrote:
> 
> > 
> > The main difference is that I don't see a neighbor solicitation from
> > the router for the VPS's IPv6 address - maybe that was already
> > somehow triggered when adding the IP address?
> > 
> > Could you re-run it one more time and make sure you start the tcpdump
> > before adding the new IP address?
> >   
> 
> It looks like there is a neighbor solicitation from the router this time around.

And comparing the neighbor advertisements:

Debian
> 10:33:23.197053 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) 2602:fed2:7116:d82c::5 > fe80::da67:d9ff:fe58:3d1b: [icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is 2602:fed2:7116:d82c::5, Flags [solicited, override]

NetBSD
> 05:01:13.467620 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6 (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b: [icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is 2602:fed2:7116:d82c::6, Flags [solicited, override]

I am seeing this difference:

2602:fed2:7116:d82c::5 > fe80::da67:d9ff:fe58:3d1b
vs.
fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b


Christof

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