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[Rodolfo Alonso <2052821@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When a gateway network (external network) is added to a router (OVN
Logical_Router), a gateway port (OVN Logical_Router_Port) is created. If
the router GW network is a tunnelled network, the GW LRP won't be bound
to any GW chassis; the network has no physical network thus there is no
correspondence with any GW physical bridge. Check [1] for more
information.

In order to be able to send traffic through a GW chassis, it is needed to pin the LR to a chassis manually:
  LR:options:chassis=<GW chassis UUID>

Note: there is a proposal [3] to make this functionality a core OVN
functionality, being able to assign a "HA_Chassis_Group" to a Logical
Router. This LP bug wants to implement the same functionality but in the
Neutron code.

[1]https://review.opendev.org/c/openstack/neutron/+/908325

References:
[2]https://bugzilla.redhat.com/show_bug.cgi?id=2259161
[3]https://issues.redhat.com/browse/FDP-365

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2052821

Title:
  [OVN] Pin a Logical_Router to a chassis when external network is
  tunnelled

Status in neutron:
  New

Bug description:
  When a gateway network (external network) is added to a router (OVN
  Logical_Router), a gateway port (OVN Logical_Router_Port) is created.
  If the router GW network is a tunnelled network, the GW LRP won't be
  bound to any GW chassis; the network has no physical network thus
  there is no correspondence with any GW physical bridge. Check [1] for
  more information.

  In order to be able to send traffic through a GW chassis, it is needed to pin the LR to a chassis manually:
    LR:options:chassis=<GW chassis UUID>

  Note: there is a proposal [3] to make this functionality a core OVN
  functionality, being able to assign a "HA_Chassis_Group" to a Logical
  Router. This LP bug wants to implement the same functionality but in
  the Neutron code.

  [1]https://review.opendev.org/c/openstack/neutron/+/908325

  References:
  [2]https://bugzilla.redhat.com/show_bug.cgi?id=2259161
  [3]https://issues.redhat.com/browse/FDP-365

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