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[Armando Migliaccio <1367596@xxxxxxxxxxxxxxxxxx>]

I disagree. Management place != Control place != Data plane.

Disabling the agent should not affect the data plane.

** Changed in: neutron
       Status: New => Opinion

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https://bugs.launchpad.net/bugs/1367596

Title:
  admin_state_up=False on l3-agent doesn't affect active routers

Status in OpenStack Neutron (virtual network service):
  Opinion

Bug description:
  When cloud admin is shutting down l3-agent via API (without evacuating routers first) it stands to reason he would like traffic to stop routing via this agent (either for maintenance or maybe because a security breach was found...).
  Currently, even when an agent is down, traffic keeps routing without any affect.

  Agent should set all interfaces inside router namespace  to DOWN so no
  more traffic is being routed.

  Alternatively, agent should set routers admin state to DOWN, assuming
  this actually affects the router.

  Either way, end result should be - traffic is not routed via agent
  when admin brings it down.

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