** Also affects: quantum (Ubuntu)
Importance: Undecided
Status: New
** Changed in: neutron
Status: New => Invalid
** Changed in: neutron
Assignee: Jian Wen (wenjianhn) => (unassigned)
** Changed in: quantum (Ubuntu)
Assignee: (unassigned) => Jian Wen (wenjianhn)
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https://bugs.launchpad.net/bugs/1252603
Title:
PMTUD needs to be disabled for tunneling to work in many Grizzly
environments.
Status in OpenStack Neutron (virtual network service):
Invalid
Status in “quantum” package in Ubuntu:
New
Bug description:
In Grizzly, the version of OVS is lower than 1.9.0. As a result, tunnel path
MTU
discovery default value is set to 'enabled'. But internet-wide path MTU
discovery
rarely works, we need to add a configuration option to disable tunnel path MTU
Discovery.
Discussion about this issue:
Connectivity issue from within the Instances.
http://lists.openstack.org/pipermail/openstack/2013-August/000293.html
Blog about this issue:
Path MTU discovery and GRE.
http://techbackground.blogspot.com/2013/06/path-mtu-discovery-and-gre.html
Tunnel Path MTU Discovery default value was set to 'disabled' in OVS 1.9.0.
Both inheritance of the Don't Fragment bit in IP tunnels (df_inherit) and path
MTU discovery are no longer supported in OVS 1.10.0. So Linux distributions
that ship with OVS >= 1.9.0 for Havana have no such issue.
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