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[Assaf Muller <amuller@xxxxxxxxxx>]

Public bug reported:

Steps to reproduce:
0) Multinode setup
1) Create distributed router
2) Add two internal interfaces
3) Set the router as gateway

At this point the router has 5 ports: Two internal, one external, and
two owned by DVR SNAT

4) Now delete the first internal interface (By subnet).

Two ports were deleted as expected. However, the SNAT namespace on the
network node will be empty!

Second (I assume related bug):
Repeat steps 0 to 3, and in step 4:
4) Now delete the first internal interface (By port).

Three ports were deleted instead of two: The internal port, its SNAT
port, and the SNAT port of the second interface. The SNAT namespace will
be empty at this point.

I suspect there's two bugs here.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: l3-dvr-backlog

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https://bugs.launchpad.net/bugs/1443524

Title:
  Removing one internal interface from a DVR router deletes all SNAT
  ports

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  Steps to reproduce:
  0) Multinode setup
  1) Create distributed router
  2) Add two internal interfaces
  3) Set the router as gateway

  At this point the router has 5 ports: Two internal, one external, and
  two owned by DVR SNAT

  4) Now delete the first internal interface (By subnet).

  Two ports were deleted as expected. However, the SNAT namespace on the
  network node will be empty!

  Second (I assume related bug):
  Repeat steps 0 to 3, and in step 4:
  4) Now delete the first internal interface (By port).

  Three ports were deleted instead of two: The internal port, its SNAT
  port, and the SNAT port of the second interface. The SNAT namespace
  will be empty at this point.

  I suspect there's two bugs here.

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