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ifup gets different IPv6 address than Network Manager

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  ifup gets different IPv6 address than Network Manager Nate Bargmann <n0nb@n0nb.us> - 2020-09-22 01:00 +0200
    Re: ifup gets different IPv6 address than Network Manager Andrei POPESCU <andreimpopescu@gmail.com> - 2020-09-22 09:10 +0200

#227227 — ifup gets different IPv6 address than Network Manager

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This one is riddling me.

I have three Buster hosts that use Network Manager.  Two are running
Gnome and one is a Freedombox.  I have several other hosts that I just
enabled IPv6 DHCP via the /etc/network/interfaces configuration file.
All hosts generate a SLAAC address and all receive a DHCP address.  My
router is running OpenWRT 19.07.4 updated as of yesterday.

In the OpenWRT DHCP configuration I have included an IPv6 Suffix
parameter for all hosts.  However, until I enabled the hosts to receive
a DHCP address via ifup, I had never seen an IPv6 address that included
that suffix.  The ifup enabled hosts all receive an IPv6 address that
ends with this configured suffix, which is exactly what I would like the
hosts that use Network Manager to receive as well.  The suffixes I have
assigned have a relationship to the IPv4 addresses I have assigned each
host so this is a handy way for me to visually associate an IPv6 address
to a host.

Has anyone managed to get Network Manager to work in a like manner?

- Nate

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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#227240

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On Lu, 21 sep 20, 17:59:33, Nate Bargmann wrote:
> 
> In the OpenWRT DHCP configuration I have included an IPv6 Suffix
> parameter for all hosts.  However, until I enabled the hosts to receive
> a DHCP address via ifup, I had never seen an IPv6 address that included
> that suffix.  The ifup enabled hosts all receive an IPv6 address that
> ends with this configured suffix, which is exactly what I would like the
> hosts that use Network Manager to receive as well.  The suffixes I have
> assigned have a relationship to the IPv4 addresses I have assigned each
> host so this is a handy way for me to visually associate an IPv6 address
> to a host.
> 
> Has anyone managed to get Network Manager to work in a like manner?

I'm using a slightly different configuration, with the suffix configured 
in the host[1].

In the IPv6 Settings tab of the connection try setting the "Method" to 
"Automatic, DHCP only". The default appears to be "Automatic" which 
could also imply SLAAC.

[1] this must be done in the configuration file, at least on buster it's 
not exposed in the GUI connection editor.

Kind regards,
Andrei
-- 
http://wiki.debian.org/FAQsFromDebianUser

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