IPV6 addresses

[Colin Law]

On 25 June 2018 at 15:09, Karl Auer <kauer at biplane.com.au> wrote:
> On Mon, 2018-06-25 at 14:51 +0100, Colin Law wrote:
>> nmcli connection modify "Wired connection 1" ipv6.addr-gen-mode 1
>> does change the fe00:: address as documented.  Why it is not visible
>> in any of the proc/sys entries I don't know (they are the same on
>> both machines, all, default and eth0/en01.
>
> Huh. Wonder if an RA can suggest to nodes that they use SP addresses?

Eth0 can have multiple connections configured in Network Manager and
presumably each can have different settings, so I guess there must be
more to it than /proc/sys/net/ipv6/conf/eth0.  Or is that supposed to
follow the current setting? It doesn't.

In fact a bit of googling turns up the fact that the file
"/etc/NetworkManager/system-connections/Wired connection 1" contains
[ipv6]
addr-gen-mode=stable-privacy

I don't know what it was before I changed it using nmcli, but
presumably it was either missing or different.

Colin