On 19.02.2026 17:10 Uhr Greg Wooledge wrote:

> On Thu, Feb 19, 2026 at 16:29:11 +0100, Marco Moock wrote:
> > On 19.02.2026 15:10 Greg Wooledge wrote:
> >   
> > > I didn't.  I have no idea how IPv6 works, or is intended to work.
> > >  
> > 
> > There are courses online by people who know.
> >   
> > > I've never seen a system where it works.  
> > 
> > Then it seems you are living behind the moon.  
> 
> We call it the United States.

Millions of users there exist with IPv6.

> > Millions of machines use
> > it every day and terabits per second of traffic flows.  
> 
> Oh, I'm not saying it doesn't exist, or doesn't work well for billions
> of people.  Just that I've personally never had access to a system
> where it works.

Many ISPs provide it, many VPS too. If you want a test system, you can
rent one for ~5$ per month.

> My home system gives:
> 
> hobbit:~$ ping 2001:41b8:202:deb:216:36ff:fe40:4002
> ping: connect: Network is unreachable

That means you don't have global IPv6 connectivity.

> And the VPS with the IPv6 route but no IPv6 address has already been
> covered.
> 
> > In your case: Investigate how the route came there. Use tcpdump and
> > monitor for router advertisments. If there are some, check from
> > which mac address they are and investigate why that device send
> > them out.  
> 
> I have an alternative plan: don't touch it at all, so I don't break
> anything, especially since I don't understand it.

As your posts here shows, your system is already broken. Please don't
come back and ask again if something is not working, if you still have
the non-working route. :-)

-- 
kind regards
Marco

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