Public bug reported:
I have OpenStack environment with OVS with GRE tunnels between Compute
nodes.
All nodes OpenStack nodes have:
Description: Ubuntu 14.04.2 LTS
Release: 14.04
After upgrading kernel from 3.13.0-45 to 3.13.0-46 on one Compute node
OpenStack networking on this node no longer works.
It also does not work on any newer version up to 3.13.0-65.
Everything looks OK, bridges and ports are configured in OVS, but there
is no communication - VMs can't receive network configuration from DHCP
agent running on another server.
The same is with 3.16 kernel:
Last working version is 3.16.0-30.
With version 3.16.0-31and newer up to 3.16.0-50 network communication does not
work.
I analyzed changes included in 3.13.0-46 and 3.16.0-31 and both have the same
change regarding GRE:
* gre: fix the inner mac header in nbma tunnel xmit path
Maybe this is the reason?
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1504154
Title:
OVS with GRE tunnels no longer works
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