** Description changed:

- We have experienced this issue on mixed ipv6/ipv4 corporate network on Ubuntu 
18.04.
- Unfortunately next LTS release is not yet an option for us.
+ [Impact]
  
- This is same as https://bugzilla.gnome.org/show_bug.cgi?id=783391
- This was fixed in 1.12.0.
+  * 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.
  
- Could you consider including the below patch on ubuntu 18.04?
+  * 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
  
- 
https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=17009ed91da8b3e0b10ee7e94d220be9bd3fa84c
+  * Upstream bug:
+    https://bugzilla.gnome.org/show_bug.cgi?id=783391
  
- The patch can be applied with some adjustements on top of the version of
- network manager included in Bionic (pull-lp-source network-manager
- bionic). A function name has changed, changing the function name in the
- downloaded patch is enough to apply the patch.
+ [Test Plan]
  
- cat
- 
../57ab9fd60fc9ec3ab7bc3fcef40b1f003d614162..17009ed91da8b3e0b10ee7e94d220be9bd3fa84c.patch
- |sed
- 's|nm_dbus_object_clear_and_unexport|nm_exported_object_clear_and_unexport|g'
- > modified_patch.patch
+  * 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.
  
- This has been tested on some devices and so far we have not seen any problems
- ipv4 only network (cable/wifi)
- ipv6/ipv4 mixed network (cable/wifi)
+ [Where problems could occur]
+ 
+  * This patch could possibly break networking using and that would be bad.
+    Network manager should be able to restart connection more properly with
+    this patch though.
+ 
+ [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.

** Patch added: "Debdiff against network-manager_1.10.6-2ubuntu1.5"
   
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1969901/+attachment/5584241/+files/network-manager_1.10.6-2ubuntu1.6.debdiff

** Description changed:

  [Impact]
  
-  * 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 affects Ubuntu 18.04 where Network Manager version 1.10.6 is
+ used.
  
-  * 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
+  * 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.
  
-  * Upstream bug:
-    https://bugzilla.gnome.org/show_bug.cgi?id=783391
+  * 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.
+  * 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]
  
-  * This patch could possibly break networking using and that would be bad.
-    Network manager should be able to restart connection more properly with
-    this patch though.
+  * This patch could possibly break networking using and that would be bad.
+    Network manager should be able to restart connection more properly with
+    this patch though.
  
  [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.
+  * 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.

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https://bugs.launchpad.net/bugs/1969901

Title:
  network-manager fails to renew ipv6 address

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