On Thursday, 5 December 2019 21:17:59 GMT Ralph Seichter wrote:
> * Peter Humphrey:
> > $ ping6 vdsl
> > ping: vdsl: No address associated with hostname
> 
> The outcome of ping depends on /etc/resolv.conf and /etc/hosts, and even
> on the OS of the IPv6 nodes involved. Apple devices will be available as
> somename.local, with "somename" being what the user configured as the
> device's name in Preferences->Sharing. I can for example ping my iPhone
> via "ping6 silver.local".

OK, got that.

> > If I add the LAN address of the Bipac to /etc/hosts, ping finds it
> > okay, but what if the address changes if the Bipac reboots?
> 
> Your Bipac will have multiple "LAN addresses", or rather addresses that
> are bound to the LAN-facing network interface. In your example, you were
> pinging the global scope address 2a02:x which may change over time,
> unless your provider assigns static networks (mine does not). However,
> the router should also have at least one link-local address and one
> unique local address (ULA):

My IPv6 address is indeed static.

>   Global scope: 2a02:8010:x (may change or may not)
>   Link local: fe80:y (may change with SLAAC privacy extensions)
>   ULA: fd67:z (should be fixed)
> 
> With my router, the ULA was set up once when I first picked a random ULA
> prefix, and has remained immutable since then.

I can't see any fd67... Addresses here. The only IPv6 details my router shows 
are the LAN and WAN addresses, and 'ip -6 route show' on this host, although 
it lists six addresses bound to eth0, doesn't mention fd67.

Do I need to fix a ULA (on each host?), and how would I choose and apply it? 
My router seems to be a bit basic in the IPv6 department.

> > I see my mobile phone has acquired an IPv6 address starting with
> > fe80::40be... and it doesn't look like its MAC address.
> 
> That's not actually a bad thing. I mentioned SLAAC privacy extensions
> (RFC 4941) before; [1] offers some explanations.
> 
> [1]
> https://www.internetsociety.org/resources/deploy360/2014/privacy-extensions
> -for-ipv6-slaac/

Thanks for the link and your help.

-- 
Regards,
Peter.




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