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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1343320

Title:
  in init_l3 ip address delete may occurrent delete multiple ips

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  For example:

  # ip ad add 10.1.1.1/24 dev lo
  # ip ad add 10.1.1.2/24 dev lo

  # ip ad
  1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 10.1.1.1/24 scope global lo
         valid_lft forever preferred_lft forever
      inet 10.1.1.2/24 scope global secondary lo
         valid_lft forever preferred_lft forever

  # ip ad del 10.1.1.1/24 dev lo
  # ip ad
  1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

  Added two ips, and deleted one, all ips are gone.

  This is because 10.1.1.2 is secondary, if the primary address is
  deleted, also does the secondary address.

  There is an sysconf entry controls the behaviour of deleting primary
  ip (/proc/sys/net/ipv4/conf/all/promote_secondaries). when set instead
  of deleting the secondary address, it will be promoted to primary ip

  We should set it when creating a namespace.

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