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[Flavio Fernandes <flavio@xxxxxxxxxxx>]

Public bug reported:

OVN has been changed to use OF15  see [1]

Because of that, devstack configuration scripts must be updated to stop using the hard coded Openflow13
protocol. Still, we should make this backwards compatible so it remains working on potentially older
versions of OVN.

The error you observe in this situation looks like this:

tail -F /opt/stack/logs/ovs-vswitchd.log

2020-05-06T21:04:31.488Z|00482|vconn|WARN|unix#341: version negotiation failed (we support version 0x04, peer support
s version 0x06)

To work around this issue on devstack, set the protocol and restart
vswitchd service:

    systemctl restart devstack@ovs-vswitchd.service

https://github.com/ovn-
org/ovn/commit/6ec0b82038052866533f12823fe410308b3e457a

** Affects: neutron
     Importance: Undecided
     Assignee: Flavio Fernandes (ffernand)
         Status: In Progress

** Changed in: neutron
     Assignee: (unassigned) => Flavio Fernandes (ffernand)

** Changed in: neutron
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1877195

Title:
  [ovn] neutron devstack needs to support openflow15

Status in neutron:
  In Progress

Bug description:
  OVN has been changed to use OF15  see [1]

  Because of that, devstack configuration scripts must be updated to stop using the hard coded Openflow13
  protocol. Still, we should make this backwards compatible so it remains working on potentially older
  versions of OVN.

  The error you observe in this situation looks like this:

  tail -F /opt/stack/logs/ovs-vswitchd.log

  2020-05-06T21:04:31.488Z|00482|vconn|WARN|unix#341: version negotiation failed (we support version 0x04, peer support
  s version 0x06)

  To work around this issue on devstack, set the protocol and restart
  vswitchd service:

      systemctl restart devstack@ovs-vswitchd.service

  https://github.com/ovn-
  org/ovn/commit/6ec0b82038052866533f12823fe410308b3e457a

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