Proposal for test plan: Setup of environment 1. Install two identical computers (A,B) with Ubuntu 18.04 with the same configuration 2. On computer B installed the patched version of network manager 3. Try to make the network conditions the same on both computers by connecting the computers two the same switch. This makes sure they are connected to the same subnet/dhcp-server.
Tests steps (the same on both computers). Execute 5 days. 1. check network state (ipv4/ipv6) 2. if ipv6 does not come up 2.a stop network manager sudo service network-manager stop 2.b delete lease files sudo rm /var/lib/NetworkManager/dhclient6* 2.c restart network manager sudo service network-manager start 3. save network manager log to file for later reference: journalctl -u NetworkManager.service 4. disconnect network cable 5. shutdown computer 6. wait at least 12 hours (maximum lease time in current dhcp setup) to make lease expire 7. start computer 8. GOTO 1 Expected outcome: Computer A should sometime fail in getting an IPv6 address Computer B should always succeed in getting an IPv6 address -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1969901 Title: network-manager fails to renew ipv6 address Status in network-manager package in Ubuntu: Fix Released Status in network-manager source package in Bionic: Incomplete Bug description: [Impact] * This affects Ubuntu 18.04 where Network Manager version 1.10.6 is used. * Network manager might kill dhclient(6) and fail to start it again causing the IPv6 address to be lost on a network that uses mixed IPv4/IPV6. The network status will still be seen as online in gnome since ipv4 is still active. The user then have to manually remove the dhcpv6 lease files and restart ipv6 connection/restart network manager to regain IPv6 connectivity. * This is a cherry-pick from Network manager 1.10.8 (Ubuntu's version is based on 1.10.6): https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/7fbbe7ebee99785e38d39c37e515a64a28edef0f * Upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=783391 [Test Plan] * The exact conditions for reproducing this bug on mixed IPv4/IPv6 networks are not known but includes using both IPv4 and IPv6, both using dhcp. [Where problems could occur] * The change is in the dchp lease expiration handling so verify that there is no regression in dhcp renewals on different type of configuration include IPv6 [Other Info] * We have tested this patch on a couple of clients where we have seen this this problem. If this patch is feasible to include in Ubuntu 18.04 we could request more users to test. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1969901/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
