| 2018-01-17 11:33:30 |
James Page |
bug |
|
|
added bug |
| 2018-01-17 11:38:44 |
James Page |
description |
Under Linux 4.13 its not possible to configure GRE tunnel devices with a MTU larger than 1500; this impacts on Open vSwitch (which creates tunnel devices for GRE overlay networking) and the ip tools.
The kernel will error with:
gre_sys: Invalid MTU 65000 requested, hw max 1500
The side effect of this is that if overlay networks are configured with high MTUs, the gre devices fragment the packets and networking is generally slow/broken.
This is resolved as part of the upcoming 4.15 kernel under:
https://github.com/torvalds/linux/commit/cfddd4c33c254954927942599d299b3865743146 |
[Impact]
GRE overlay networks can't carry traffic with MTU > 1500
[Test Case]
[Regression Potential]
[Bug Report]
Under Linux 4.13 its not possible to configure GRE tunnel devices with a MTU larger than 1500; this impacts on Open vSwitch (which creates tunnel devices for GRE overlay networking) and the ip tools.
The kernel will error with:
gre_sys: Invalid MTU 65000 requested, hw max 1500
The side effect of this is that if overlay networks are configured with high MTUs, the gre devices fragment the packets and networking is generally slow/broken.
This is resolved as part of the upcoming 4.15 kernel under:
https://github.com/torvalds/linux/commit/cfddd4c33c254954927942599d299b3865743146 |
|
| 2018-01-17 11:44:06 |
James Page |
description |
[Impact]
GRE overlay networks can't carry traffic with MTU > 1500
[Test Case]
[Regression Potential]
[Bug Report]
Under Linux 4.13 its not possible to configure GRE tunnel devices with a MTU larger than 1500; this impacts on Open vSwitch (which creates tunnel devices for GRE overlay networking) and the ip tools.
The kernel will error with:
gre_sys: Invalid MTU 65000 requested, hw max 1500
The side effect of this is that if overlay networks are configured with high MTUs, the gre devices fragment the packets and networking is generally slow/broken.
This is resolved as part of the upcoming 4.15 kernel under:
https://github.com/torvalds/linux/commit/cfddd4c33c254954927942599d299b3865743146 |
[Impact]
GRE overlay networks can't carry traffic with MTU > 1500
[Test Case]
sudo add-apt-repository cloud-archive:pike
sudo apt update
sudo apt install openvswitch-switch
sudo ovs-vsctl add-br br-tun
sudo ovs-vsctl add-port br-tun gre0 -- set interface gre0 type=gre options:remote_ip=10.100.1.1
gre_sys device will be configured with MTU 1472.
sudo ip link set gre_sys mtu 65000
will fail with EINVAL.
[Regression Potential]
[Bug Report]
Under Linux 4.13 its not possible to configure GRE tunnel devices with a MTU larger than 1500; this impacts on Open vSwitch (which creates tunnel devices for GRE overlay networking) and the ip tools.
The kernel will error with:
gre_sys: Invalid MTU 65000 requested, hw max 1500
The side effect of this is that if overlay networks are configured with high MTUs, the gre devices fragment the packets and networking is generally slow/broken.
This is resolved as part of the upcoming 4.15 kernel under:
https://github.com/torvalds/linux/commit/cfddd4c33c254954927942599d299b3865743146 |
|
| 2018-01-17 12:00:06 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2018-01-17 12:15:22 |
James Page |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2018-01-17 13:43:31 |
Kleber Sacilotto de Souza |
bug |
|
|
added subscriber Kleber Sacilotto de Souza |
| 2018-01-17 16:21:19 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2018-01-17 16:21:37 |
Joseph Salisbury |
linux (Ubuntu): status |
Confirmed |
Triaged |
|
| 2018-01-17 16:21:42 |
Joseph Salisbury |
tags |
|
kernel-da-key |
|
| 2018-01-17 17:21:35 |
Joseph Salisbury |
nominated for series |
|
Ubuntu Artful |
|
| 2018-01-17 17:21:35 |
Joseph Salisbury |
bug task added |
|
linux (Ubuntu Artful) |
|
| 2018-01-17 17:21:40 |
Joseph Salisbury |
linux (Ubuntu): status |
Triaged |
In Progress |
|
| 2018-01-17 17:21:43 |
Joseph Salisbury |
linux (Ubuntu Artful): status |
New |
In Progress |
|
| 2018-01-17 17:21:46 |
Joseph Salisbury |
linux (Ubuntu Artful): importance |
Undecided |
Medium |
|
| 2018-01-17 17:21:51 |
Joseph Salisbury |
linux (Ubuntu): assignee |
|
Joseph Salisbury (jsalisbury) |
|
| 2018-01-17 17:21:56 |
Joseph Salisbury |
linux (Ubuntu Artful): assignee |
|
Joseph Salisbury (jsalisbury) |
|
| 2018-01-19 15:46:43 |
Joseph Salisbury |
nominated for series |
|
Ubuntu Bionic |
|
| 2018-01-19 15:46:43 |
Joseph Salisbury |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2018-01-19 16:03:44 |
Seth Forshee |
linux (Ubuntu Bionic): status |
In Progress |
Fix Committed |
|
| 2018-02-04 01:19:44 |
Khaled El Mously |
linux (Ubuntu Artful): status |
In Progress |
Fix Committed |
|
| 2018-02-14 09:38:00 |
Kleber Sacilotto de Souza |
tags |
kernel-da-key |
kernel-da-key verification-needed-artful |
|
| 2018-02-14 11:24:33 |
James Page |
tags |
kernel-da-key verification-needed-artful |
kernel-da-key verification-done-artful |
|
| 2018-02-15 15:12:14 |
Timo Aaltonen |
tags |
kernel-da-key verification-done-artful |
kernel-da-key verification-done-artful verification-needed-xenial |
|
| 2018-02-15 15:13:13 |
Timo Aaltonen |
tags |
kernel-da-key verification-done-artful verification-needed-xenial |
kernel-da-key verification-done-artful |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
linux (Ubuntu Artful): status |
Fix Committed |
Fix Released |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-15115 |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-17712 |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-5715 |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-5753 |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-5754 |
|
| 2018-02-21 18:56:18 |
Launchpad Janitor |
cve linked |
|
2017-8824 |
|
| 2019-10-03 08:27:03 |
Po-Hsu Lin |
linux (Ubuntu): status |
Fix Committed |
Fix Released |
|
| 2019-10-03 08:27:05 |
Po-Hsu Lin |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
