[Dnsmasq-discuss] IPv6 addresses are (almost) immediately deprecated

[Geert Stappers]

On Fri, Sep 22, 2023 at 06:18:41PM +0100, Graham Leggett via Dnsmasq-discuss wrote:
> Hi all,
> 
> I have a dnsmasq config on a development machine that looks like this:
> 
> dhcp-range=fd33:xxxx:xxxx:1::, ra-only, 24h
> 
> The intention is for this development machine to announce to anyone
> directly connected that the development machine exists, and can be
> connected to. No routing, no DNS, only “I exist”.
> 
> This almost works. On MacOS I’m getting an IP address allocated on
> the expected interface, but almost immediately the address is declared
> “deprecated”.

Why?


> This causes MacOS to ignore the direct connection and to route packets
> to the router, which in turn has no idea what to do with the packets
> and (correctly) drops them.
> 
> How do I get dnsmasq to tell anyone who cares that the IPv6 addresses
> are valid and not deprecated?

I would start with only two computers: One being dnsmasq doing radvd,
the other one being told "you exist".

 
> The manual refers to a timeout which defaults to one day, and allows
> me to set it to a day, but I’m not sure it’s configured correctly.

Consider it correctly configured until proven otherwise.

 
> Regards,
> Graham


Groeten
Geert Stappers
-- 
Silence is hard to parse