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[Rodolfo Alonso <1598081@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1598081

Title:
  [RFE] Port status update

Status in neutron:
  Fix Released

Bug description:
  Neutron port status field represents the current status of a port in
  the cloud infrastructure. The field can take one of the following
  values: 'ACTIVE', 'DOWN', 'BUILD' and 'ERROR'.

  At present, if a network event occurs in the data-plane (e.g. virtual
  or physical switch fails or one of its ports, cable gets pulled
  unintentionally, infrastructure topology changes, etc.), connectivity
  to logical ports may be affected and tenants' services interrupted.
  When tenants/cloud administrators are looking up their resources'
  status (e.g. Nova instances and services running in them, network
  ports, etc.), they will wrongly see everything looks fine. The problem
  is that Neutron will continue reporting port 'status' as 'ACTIVE'.

  Many SDN Controllers managing network elements have the ability to
  detect and report network events to upper layers. This allows SDN
  Controllers' users to be notified of changes and react accordingly.
  Such information could be consumed by Neutron so that Neutron could
  update the 'status' field of those logical ports, and additionally
  generate a notification message to the message bus.

  However, Neutron misses a way to be able to receive such information
  through e.g. ML2 driver or the REST API ('status' field is read-only).
  There are pros and cons on both of these approaches as well as other
  possible approaches. This RFE intends to trigger a discussion on how
  Neutron could be improved to receive fault/change events from SDN
  Controllers or even also from 3rd parties not in charge of controlling
  the network (e.g. monitoring systems, human admins).

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