| 1 |
On Thursday, 5 December 2019 21:17:59 GMT Ralph Seichter wrote: |
| 2 |
> * Peter Humphrey: |
| 3 |
> > $ ping6 vdsl |
| 4 |
> > ping: vdsl: No address associated with hostname |
| 5 |
> |
| 6 |
> The outcome of ping depends on /etc/resolv.conf and /etc/hosts, and even |
| 7 |
> on the OS of the IPv6 nodes involved. Apple devices will be available as |
| 8 |
> somename.local, with "somename" being what the user configured as the |
| 9 |
> device's name in Preferences->Sharing. I can for example ping my iPhone |
| 10 |
> via "ping6 silver.local". |
| 11 |
|
| 12 |
OK, got that. |
| 13 |
|
| 14 |
> > If I add the LAN address of the Bipac to /etc/hosts, ping finds it |
| 15 |
> > okay, but what if the address changes if the Bipac reboots? |
| 16 |
> |
| 17 |
> Your Bipac will have multiple "LAN addresses", or rather addresses that |
| 18 |
> are bound to the LAN-facing network interface. In your example, you were |
| 19 |
> pinging the global scope address 2a02:x which may change over time, |
| 20 |
> unless your provider assigns static networks (mine does not). However, |
| 21 |
> the router should also have at least one link-local address and one |
| 22 |
> unique local address (ULA): |
| 23 |
|
| 24 |
My IPv6 address is indeed static. |
| 25 |
|
| 26 |
> Global scope: 2a02:8010:x (may change or may not) |
| 27 |
> Link local: fe80:y (may change with SLAAC privacy extensions) |
| 28 |
> ULA: fd67:z (should be fixed) |
| 29 |
> |
| 30 |
> With my router, the ULA was set up once when I first picked a random ULA |
| 31 |
> prefix, and has remained immutable since then. |
| 32 |
|
| 33 |
I can't see any fd67... Addresses here. The only IPv6 details my router shows |
| 34 |
are the LAN and WAN addresses, and 'ip -6 route show' on this host, although |
| 35 |
it lists six addresses bound to eth0, doesn't mention fd67. |
| 36 |
|
| 37 |
Do I need to fix a ULA (on each host?), and how would I choose and apply it? |
| 38 |
My router seems to be a bit basic in the IPv6 department. |
| 39 |
|
| 40 |
> > I see my mobile phone has acquired an IPv6 address starting with |
| 41 |
> > fe80::40be... and it doesn't look like its MAC address. |
| 42 |
> |
| 43 |
> That's not actually a bad thing. I mentioned SLAAC privacy extensions |
| 44 |
> (RFC 4941) before; [1] offers some explanations. |
| 45 |
> |
| 46 |
> [1] |
| 47 |
> https://www.internetsociety.org/resources/deploy360/2014/privacy-extensions |
| 48 |
> -for-ipv6-slaac/ |
| 49 |
|
| 50 |
Thanks for the link and your help. |
| 51 |
|
| 52 |
-- |
| 53 |
Regards, |
| 54 |
Peter. |
Archives