Public bug reported:

On an OpenStack Ocata install a guest with two network interfaces
attached is provided with network_data.json that describes 2 default
routes.

See attached network_data.json and (pretty formatted network_data-pretty.json).
Also note that the reporter ran 'dhclient -v' which created the attached
dhclient.leases file.  Only one of the dhcp servers returns a 'routers'
option.  That would seem to indicate that the platform has some distinction.

Cloud-init renders the networking in /etc/network/interfaces and ends
up with 2 default routes, which doesn't do what the user wanted.

This issue was originally raised in freenode #cloud-init.
There is discussion surrounding it with the original reporter at:
  https://irclogs.ubuntu.com/2017/09/22/%23cloud-init.html

Related bugs:
 * bug 1717560: allow to have no default route in DHCP host routes

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1718954

Title:
  network_data.json contains default routes for 2 interfaces

Status in OpenStack Compute (nova):
  New

Bug description:
  On an OpenStack Ocata install a guest with two network interfaces
  attached is provided with network_data.json that describes 2 default
  routes.

  See attached network_data.json and (pretty formatted 
network_data-pretty.json).
  Also note that the reporter ran 'dhclient -v' which created the attached
  dhclient.leases file.  Only one of the dhcp servers returns a 'routers'
  option.  That would seem to indicate that the platform has some distinction.

  Cloud-init renders the networking in /etc/network/interfaces and ends
  up with 2 default routes, which doesn't do what the user wanted.

  This issue was originally raised in freenode #cloud-init.
  There is discussion surrounding it with the original reporter at:
    https://irclogs.ubuntu.com/2017/09/22/%23cloud-init.html

  Related bugs:
   * bug 1717560: allow to have no default route in DHCP host routes

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https://bugs.launchpad.net/nova/+bug/1718954/+subscriptions

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