| 2015-09-25 18:16:35 |
Bryan Quigley |
bug |
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added bug |
| 2015-09-26 04:04:14 |
Launchpad Janitor |
network-manager (Ubuntu): status |
New |
Confirmed |
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| 2015-09-26 15:31:15 |
Bryan Quigley |
bug watch added |
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https://bugzilla.gnome.org/show_bug.cgi?id=752508 |
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| 2015-09-26 15:31:15 |
Bryan Quigley |
bug task added |
|
network-manager |
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| 2015-09-26 16:28:46 |
Bug Watch Updater |
network-manager: status |
Unknown |
Fix Released |
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| 2015-09-26 16:28:46 |
Bug Watch Updater |
network-manager: importance |
Unknown |
Medium |
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| 2015-09-28 18:12:17 |
Kai Kasurinen |
bug |
|
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added subscriber Kai Kasurinen |
| 2015-09-30 13:48:36 |
Alberto Salvia Novella |
network-manager (Ubuntu): importance |
Undecided |
High |
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| 2015-10-29 15:45:35 |
chantra |
bug |
|
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added subscriber chantra |
| 2015-11-03 05:27:41 |
nemith |
bug |
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added subscriber nemith |
| 2015-11-04 22:51:23 |
nemith |
summary |
[ipv6] Network manager spews logs of Lowering IPv6 MTU (1480) to match device MTU (1280) |
[ipv6] Network manager incorrectly lowers MTU when IPv6 is enabled |
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| 2015-11-05 11:09:29 |
Sebastien Bacher |
bug |
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added subscriber Ubuntu Sponsors Team |
| 2015-11-26 21:06:49 |
Mathieu Trudel-Lapierre |
network-manager (Ubuntu): status |
Confirmed |
Fix Committed |
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| 2015-11-26 21:06:56 |
Mathieu Trudel-Lapierre |
nominated for series |
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Ubuntu Wily |
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| 2015-11-26 21:06:56 |
Mathieu Trudel-Lapierre |
bug task added |
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network-manager (Ubuntu Wily) |
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| 2015-11-26 21:07:07 |
Mathieu Trudel-Lapierre |
network-manager (Ubuntu Wily): status |
New |
Triaged |
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| 2015-11-26 21:07:10 |
Mathieu Trudel-Lapierre |
network-manager (Ubuntu Wily): importance |
Undecided |
High |
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| 2015-11-26 21:07:12 |
Mathieu Trudel-Lapierre |
network-manager (Ubuntu Wily): assignee |
|
Mathieu Trudel-Lapierre (mathieu-tl) |
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| 2015-11-27 16:39:35 |
Launchpad Janitor |
network-manager (Ubuntu): status |
Fix Committed |
Fix Released |
|
| 2015-11-27 19:10:11 |
Mathieu Trudel-Lapierre |
description |
Network manager is sending out a lot of warnings about changing the MTU:
Sep 25 14:13:03 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (1280)
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (0)
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): IPv6 MTU (0) smaller than 1280, adjusting
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): Raising device MTU (0) to match IPv6 MTU (1280)
Sep 25 14:13:29 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (1280)
Lowering IPv6 MTU (1480) to match device MTU (1280) repeats about 16 times between the other messages (about 2 mins round).
This doesn't appear to be Ubuntu specific - https://bbs.archlinux.org/viewtopic.php?pid=1552751
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: network-manager 1.0.4-0ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
Uname: Linux 4.2.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 25 14:09:20 2015
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2015-01-08 (259 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150108)
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to wily on 2015-08-12 (43 days ago)
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. |
[Impact]
Users with IPv6-supporting networks will see the messages below in the bug description appear repeatedly as NM mistakes a 0 value for MTU in internal NM code with 0-size packets instead of meaning "use default MTU".
[Test case]
- Run network-manager on a network supporting IPv6.
- Check /var/log/syslog for <warn> messages from NetworkManager.
[Regression Potential]
This changes behavior for handling the MTU value for IPv6, which should be no higher than the device MTU. Since 0 is an invalid value for MTU anyway, this should not otherwise affect MTU handling for devices.
Possible regressions from the change might include invalid (too high) set MTU for a device due to the failure to recognize cases where the MTU needs to be adjusted, leading to packet loss on IPv6.
--
Network manager is sending out a lot of warnings about changing the MTU:
Sep 25 14:13:03 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (1280)
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (0)
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): IPv6 MTU (0) smaller than 1280, adjusting
Sep 25 14:13:21 desktop NetworkManager[703]: <warn> (wlan0): Raising device MTU (0) to match IPv6 MTU (1280)
Sep 25 14:13:29 desktop NetworkManager[703]: <warn> (wlan0): Lowering IPv6 MTU (1480) to match device MTU (1280)
Lowering IPv6 MTU (1480) to match device MTU (1280) repeats about 16 times between the other messages (about 2 mins round).
This doesn't appear to be Ubuntu specific - https://bbs.archlinux.org/viewtopic.php?pid=1552751
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: network-manager 1.0.4-0ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
Uname: Linux 4.2.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 25 14:09:20 2015
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2015-01-08 (259 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150108)
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to wily on 2015-08-12 (43 days ago)
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'. |
|
| 2015-11-27 19:10:13 |
Mathieu Trudel-Lapierre |
removed subscriber Ubuntu Sponsors Team |
|
|
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| 2015-11-27 19:10:23 |
Mathieu Trudel-Lapierre |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2015-12-02 03:47:51 |
Sören Brinkmann |
bug |
|
|
added subscriber Sören Brinkmann |
| 2015-12-02 20:31:40 |
Chris J Arges |
network-manager (Ubuntu Wily): status |
Triaged |
Fix Committed |
|
| 2015-12-02 20:31:42 |
Chris J Arges |
bug |
|
|
added subscriber SRU Verification |
| 2015-12-02 20:31:48 |
Chris J Arges |
tags |
amd64 apport-bug wily |
amd64 apport-bug verification-needed wily |
|
| 2015-12-03 16:12:35 |
Bryan Quigley |
tags |
amd64 apport-bug verification-needed wily |
amd64 apport-bug verification-done wily |
|
| 2015-12-07 13:25:20 |
Christian Rank |
bug |
|
|
added subscriber Christian Rank |
| 2015-12-10 20:17:44 |
Brian Murray |
removed subscriber Ubuntu Stable Release Updates Team |
|
|
|
| 2015-12-10 20:27:46 |
Launchpad Janitor |
network-manager (Ubuntu Wily): status |
Fix Committed |
Fix Released |
|
| 2016-01-28 09:28:17 |
Launchpad Janitor |
branch linked |
|
lp:~network-manager/network-manager/ubuntu |
|
