IPV6 addresses

Colin Law clanlaw at gmail.com
Mon Jun 25 20:01:45 UTC 2018

Just in case anyone who finds this is interested, in non-network
manager systems such as (I assume) Ubuntu Server and Raspbian it seems
this can be controlled via /etc/dhcpcd.conf by specifying
slaac  private


On 25 June 2018 at 16:57, Colin Law <clanlaw at gmail.com> wrote:
> 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

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