RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Description of problem:
I've set ipv6.method to shared to connection operating over existing ethernet device and I cannot up it anymore.

Error: Connection activation failed: Active connection removed before it was initialized

Version-Release number of selected component (if applicable):
NetworkManager-1.0.0-8.git20150107.1ea95cd3.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.nmcli connection add type ethernet con-name ethie ifname eth1
2.nmcli connection edit id ethie
3.set ipv6.method shared
4.save
5.quit
6.nmcli connection up id ethie 

Actual results:
Error: Connection activation failed: Active connection removed before it was initialized

"shared" is not yet supported for IPv6, so this isn't entirely a bug. We should probably return an error immediately when you try to activate it though, rather than allowing activation to start and then failing afterward.

Created attachment 981529 [details]
Suggested fix

Sure, LGTM

Added to master:

477033b manager: don't attempt to activate ipv6.method=shared connections

In nm-1-0:

ade0c9e manager: don't attempt to activate ipv6.method=shared connections

Sharing IPv6 connections is not supported yet is shown.

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://rhn.redhat.com/errata/RHSA-2015-2315.html