Configuring the Host Cloud
==========================

Some of the configuration recommended below is optional, but applying
all of it will provide the optimal experience.

The changes described in this document apply to compute nodes in the
host cloud.

#. The Nova option ``force_config_drive`` must _not_ be set. If you have to
   change this option, restart ``nova-compute`` to apply it.

#. Ideally, jumbo frames should be enabled on the host cloud.  This
   avoids MTU problems when deploying to instances over tunneled
   Neutron networks with VXLAN or GRE.

   For TripleO-based host clouds, this can be done by setting ``mtu``
   on all interfaces and vlans in the network isolation nic-configs.
   A value of at least 1550 should be sufficient to avoid problems.

   If this cannot be done (perhaps because you don't have access to make
   such a change on the host cloud), it will likely be necessary to
   configure a smaller MTU on the deployed virtual instances.  Details
   on doing so can be found on the :doc:`../usage/usage` page.