[Bug 1892405] Re: Removing router interface causes router to stop routing between all

[Corey Bryant]

** Description changed:

- Stumbled upon an issue where removing a DVR HA router interface renders
- all other subnets connected to that router to stop routing. VMs can't
- reach the HA port (IP) of the router (ping).
+ [Impact]
+ Stumbled upon an issue where removing a DVR HA router interface renders all other subnets connected to that router to stop routing. VMs can't reach the HA port (IP) of the router (ping).
  
  Worked around this by:
  openstack router set --disabled <ROUTER>
  openstack router set --enable <ROUTER>
  
  This has happened more than once in the current deployment
-  - cloud:bionic-stein
-  - neutron 2:14.0.4-0ubuntu1~cloud1
+  - cloud:bionic-stein
+  - neutron 2:14.0.4-0ubuntu1~cloud1
+ 
+ [Test Case]
+ TBD
+ 
+ [Where problems could occur]
+ TBD

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https://bugs.launchpad.net/bugs/1892405

Title:
  Removing router interface causes router to stop routing between all

Status in Ubuntu Cloud Archive:
  Triaged
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in Ubuntu Cloud Archive victoria series:
  Triaged
Status in neutron:
  In Progress
Status in neutron package in Ubuntu:
  Triaged
Status in neutron source package in Focal:
  Triaged
Status in neutron source package in Groovy:
  Triaged
Status in neutron source package in Hirsute:
  Triaged

Bug description:
  [Impact]
  Stumbled upon an issue where removing a DVR HA router interface renders all other subnets connected to that router to stop routing. VMs can't reach the HA port (IP) of the router (ping).

  Worked around this by:
  openstack router set --disabled <ROUTER>
  openstack router set --enable <ROUTER>

  This has happened more than once in the current deployment
   - cloud:bionic-stein
   - neutron 2:14.0.4-0ubuntu1~cloud1

  [Test Case]
  TBD

  [Where problems could occur]
  TBD

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