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Reviewed:  https://review.opendev.org/c/openstack/neutron/+/858835
Committed: https://opendev.org/openstack/neutron/commit/41a7479d0f93ec2ff5019a1bfdc891dda5078d65
Submitter: "Zuul (22348)"
Branch:    master

commit 41a7479d0f93ec2ff5019a1bfdc891dda5078d65
Author: Miguel Lavalle <mlavalle@xxxxxxxxxx>
Date:   Wed Sep 21 18:26:39 2022 -0500

    Handle several dhcp agents for metadata over ipv6
    
    [0] added the capability to the dhcp agent of handling metadata traffic
    over ipv6. However, the added code doesn't handle the case when a
    network is managed by more than one dhcp agent. This change fixes the
    issue.
    
    [0] https://review.opendev.org/c/openstack/neutron/+/715482
    
    Change-Id: Ie1e0739f2c7390031af196e72c678ee626d0f8b8
    Closes-Bug: #1989979


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

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https://bugs.launchpad.net/bugs/1989979

Title:
  Unexpected number of DHCP interfaces for metadata proxy

Status in neutron:
  Fix Released

Bug description:
  We upgraded neutron from ussuri to victoria in our lab environment and
  are seeing a strange error message that I dont really understand.

  The dhcp agent is logging the following for every network: Unexpected
  number of DHCP interfaces for metadata proxy, expected 1, got 3

  This seems to be related to the new metadata v6 implementation. [1]
  But as we are running with dhcp_agents_per_network = 3 it is expected that we have 3 dhcp ports that are admin state up which have the dhcp device owner.

  So far I dont understand what would be the right way to eliminate the
  error.

  
  [1] https://github.com/openstack/neutron/blob/17.4.1/neutron/agent/dhcp/agent.py#L799

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