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[Eugene Nikanorov <enikanorov@xxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1364912

Title:
  why i get one fixed ip when use a net which has two subnet to create a
  port

Status in OpenStack Neutron (virtual network service):
  Invalid

Bug description:
  a net include two subnet,i use this net to create a port , it alway
  retrun a fixed ip of one subnet

  code:
      def _try_generate_ip(context, subnets):
          """Generate an IP address.

          The IP address will be generated from one of the subnets defined on
          the network.
          """
          range_qry = context.session.query(
              models_v2.IPAvailabilityRange).join(
                  models_v2.IPAllocationPool).with_lockmode('update')
          for subnet in subnets:
              range = range_qry.filter_by(subnet_id=subnet['id']).first()
              if not range:
                  LOG.debug(_("All IPs from subnet %(subnet_id)s (%(cidr)s) "
                              "allocated"),
                            {'subnet_id': subnet['id'], 'cidr': subnet['cidr']})
                  continue
              ip_address = range['first_ip']
              LOG.debug(_("Allocated IP - %(ip_address)s from %(first_ip)s "
                          "to %(last_ip)s"),
                        {'ip_address': ip_address,
                         'first_ip': range['first_ip'],
                         'last_ip': range['last_ip']})
              if range['first_ip'] == range['last_ip']:
                  # No more free indices on subnet => delete
                  LOG.debug(_("No more free IP's in slice. Deleting allocation "
                              "pool."))
                  context.session.delete(range)
              else:
                  # increment the first free
                  range['first_ip'] = str(netaddr.IPAddress(ip_address) + 1)
              return {'ip_address': ip_address, 'subnet_id': subnet['id']}
          raise n_exc.IpAddressGenerationFailure(net_id=subnets[0]['network_id'])

  multiple subnets only return a ip

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