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Description of problem:

nmstate would like to support disabling IPv6 like we did for IPv4.
To achieve that it could be ideal if NetworkManager could provide
support of NM_SETTING_IP6_CONFIG_METHOD_DISABLED.

Version-Release number of selected component (if applicable):
NetworkManager-1.14.0-1.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. 
2.
3.

Actual results:


Expected results:


Additional info:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/merge_requests/129

Looks good to me.

Perhaps nm_ip6_config_create_setting() could generate method=disabled if it sees ipv6.disabled sysctl set. (I'm not sure; it's not a merge blocker if tests pass)

(In reply to Lubomir Rintel from comment #2)
> Looks good to me.
> 
> Perhaps nm_ip6_config_create_setting() could generate method=disabled if it
> sees ipv6.disabled sysctl set. (I'm not sure; it's not a merge blocker if
> tests pass)

Pushed a commit to do that.

Tested on NetworkManager-1.20.0-0.3.el8, ipv6 disabling works well including after reboot.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:3623