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[Fernando Royo <2002800@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

On a recent change [1], some additional checks was added to avoid ports
overlapping cidrs on a router. On this change was also added a check to
do not attached more than one port IPv6 from same network, but this
check need to allow multiple ports when a deployment is done using
ml2/ovs+xvlan+dvr, because two ports are added:

- one with device_owner as network:router_interface_distributed
- another one with device_owner as network:router_centralized_snat

[1] https://review.opendev.org/c/openstack/neutron/+/859143

** Affects: neutron
     Importance: Undecided
     Assignee: Fernando Royo (froyoredhat)
         Status: In Progress

** Changed in: neutron
     Assignee: (unassigned) => Fernando Royo (froyoredhat)

** Description changed:

- After a recent change [1], some additional checks was added to avoid
- ports overlapping cidrs on a router. On this change was also added a
- check to do not attached more than one port IPv6 from same network, but
- this check need to allow multiple ports when a deployment is done using
+ On a recent change [1], some additional checks was added to avoid ports
+ overlapping cidrs on a router. On this change was also added a check to
+ do not attached more than one port IPv6 from same network, but this
+ check need to allow multiple ports when a deployment is done using
  ml2/ovs+xvlan+dvr, because two ports are added:
  
  - one with device_owner as network:router_interface_distributed
  - another one with device_owner as network:router_centralized_snat
  
  [1] https://review.opendev.org/c/openstack/neutron/+/859143

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https://bugs.launchpad.net/bugs/2002800

Title:
  Allow multiple IPv6 ports on router from same network on
  ml2/ovs+vxlan+dvr

Status in neutron:
  In Progress

Bug description:
  On a recent change [1], some additional checks was added to avoid
  ports overlapping cidrs on a router. On this change was also added a
  check to do not attached more than one port IPv6 from same network,
  but this check need to allow multiple ports when a deployment is done
  using ml2/ovs+xvlan+dvr, because two ports are added:

  - one with device_owner as network:router_interface_distributed
  - another one with device_owner as network:router_centralized_snat

  [1] https://review.opendev.org/c/openstack/neutron/+/859143

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