The NSX-V3 plugin will use the NSX-V3 backend IPAM.
An IP pool will be created for each subnet, and port IPs will be allocated
from this pool.
The current backend limitation is that we cannot allocate a specific IP,
so port create/update with fixed_ips will fail, unless the requested ip
is the subnet gateway ip.
To enable this option set 'ipam_driver = vmware_nsxv3_ipam' in the
neutron.conf
Change-Id: I5263555cbb776018a5d01f19d0997fd2adf6483d
1266099049