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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1504154 Title: OVS with GRE tunnels no longer works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1504154/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs