yahoo-eng-team team mailing list archive

[OpenStack Infra <2003455@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/871252
Committed: https://opendev.org/openstack/neutron/commit/acb809eea422f417d4bfb2d46918839d7d379e4c
Submitter: "Zuul (22348)"
Branch:    master

commit acb809eea422f417d4bfb2d46918839d7d379e4c
Author: Luis Tomas Bolivar <ltomasbo@xxxxxxxxxx>
Date:   Fri Jan 20 12:16:06 2023 +0100

    [OVN] Ensure traffic for provider vlan networks is not tunneled
    
    This patch adds an extra checking to ensure the
    "reside-on-redirect-chassis" is set to true for the logical
    router port associated to vlan provider network despite having
    the "ovn_distributed_floating_ip" enabled or not. This is needed
    as there is an OVN bug [1] making it not work as expected.
    
    Note setting this to true has implications as the traffic will be
    centrallized (but not tunneled) through the node with the gateway
    port.
    
    The expected behavior of this flag, once [1] is fixed is:
    - reside-on-redirect-chassis flag to False: means traffic goes
      tunneled to the controller with the gateway port. Means it requires
      extra MTU reduction to work.
    - reside-on-redirect-chassis flag to True: means traffic is not
      tunneled to the controller with the gateway port, but the traffic is
      centralized through the controller with the gateway port. Thus it
      does not require extra MTU reduction.
    - reside-on-redirect-chassis to False, but with ovn-chassis-mac-mappings
      configured: means the traffic is fully distributed and it is not being
      tunneled, nor sent, through the controller with the gateway port. This
      is the preferred option as it does not require MTU reduction and it
      avoids the extra hop. However it is not working as expected, therefore
      the fallback to set reside-on-redirect-chassis to True.
    
    [1] https://bugzilla.redhat.com/show_bug.cgi?id=2162756
    
    Closes-Bug: #2003455
    Change-Id: I662cb30c842e54bb9f7dabac5519283aa7c7f8d0


** Changed in: neutron
       Status: In Progress => Fix Released

** Bug watch added: Red Hat Bugzilla #2162756
   https://bugzilla.redhat.com/show_bug.cgi?id=2162756

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/2003455

Title:
  [ovn] MTU issues due to centralized vlan provider networks

Status in neutron:
  Fix Released

Bug description:
  After this change was added [1] the traffic gets centralized not only
  for vlan tenant networks, but also for vlan provider networks. This
  means that extra reduction on the MTU size needs to be done to account
  for the geneve encapsulation due to traffic going through the
  networker node instead of directly from the node

  
  [1] https://opendev.org/openstack/networking-ovn/commit/1440207c0d568068a37a306a7f03a81ad58e468f

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/2003455/+subscriptions