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.. Licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
.. Copyright 2017 AT&T Intellectual Property. All rights reserved.
.. _ONAP Heat Networking:
ONAP Heat Networking
-----------------------
ONAP defines two types of networks: External Networks and Internal Networks.
External Networks
^^^^^^^^^^^^^^^^^^^^
ONAP defines an external network in relation to the VNF and not with regard
to the Network Cloud site. External networks may also be referred to as
"inter-VNF" networks. An external network must connect VMs in a VNF to
VMs in another VNF or an external gateway or external router.
An External Network may be a Neutron Network or a Contrail Network.
.. req::
:id: R-16968
:target: VNF
:keyword: MUST NOT
:validation_mode: static
:updated: casablanca
A VNF's Heat Orchestration Templates **MUST NOT** include heat
resources to create external networks.
External networks must be orchestrated separately, independent of the VNF.
This allows the network to be shared by multiple VNFs and managed
independently of VNFs.
.. req::
:id: R-00606
:target: VNF
:keyword: MAY
:updated: casablanca
A VNF **MAY** be connected to zero, one or more than one external
network.
.. req::
:id: R-57424
:target: VNF
:keyword: MUST
:validation_mode: none
:updated: casablanca
A VNF's port connected to an external network **MUST**
use the port for the purpose of reaching
VMs in another VNF and/or an external gateway and/or external router.
A VNF's port connected to an external network **MAY**
use the port for the purpose of reaching VMs in the same VNF.
.. req::
:id: R-99794
:target: VNF
:keyword: MUST
:validation_mode: none
:updated: casablanca
An external network **MUST** have one subnet. An external network
**MAY** have more than one subnet.
ONAP enforces a naming convention for
resource IDs and resource property
parameters associated with
external networks. :ref:`ONAP Heat Resource ID and Parameter Naming Convention`
provides additional details.
Internal Networks
^^^^^^^^^^^^^^^^^^^^
ONAP defines an internal network in relation to the VNF and not with
regard to the Network Cloud site. Internal networks may also be referred
to as "intra-VNF" networks or "private" networks. An internal network
only connects VMs in a single VNF; it must not connect to other VNFs
or an external gateway or router
.. req::
:id: R-87096
:target: VNF
:keyword: MAY
:updated: casablanca
A VNF **MAY** contain zero, one or more than one internal network.
.. req::
:id: R-35666
:target: VNF
:keyword: MUST
:validation_mode: static
:updated: casablanca
If a VNF has an internal network, the VNF Heat Orchestration Template
**MUST** include the heat resources to create the internal network.
.. req::
:id: R-86972
:target: VNF
:keyword: SHOULD
:updated: casablanca
A VNF **SHOULD** create the internal network in the VNF's Heat
Orchestration Template Base Module.
An Internal Network may be created using Neutron Heat Resources and/or
Contrail Heat Resources.
.. req::
:id: R-52425
:target: VNF
:keyword: MUST
:validation_mode: none
:updated: casablanca
A VNF's port connected to an internal network **MUST**
use the port for the purpose of reaching VMs in the same VNF.
.. req::
:id: R-46461
:target: VNF
:keyword: MUST NOT
:validation_mode: none
:updated: casablanca
A VNF's port connected to an internal network **MUST NOT** use the port
for the purpose of reaching VMs in another VNF and/or an
external gateway and/or
external router.
.. req::
:id: R-16241
:target: VNF
:keyword: MUST
:validation_mode: static
:updated: casablanca
A VNF's internal network **MUST** have one subnet.
A VNF's internal network **MAY** have more than one subnet.
.. req::
:id: R-22688
:target: VNF
:keyword: MUST
:validation_mode: static
:updated: casablanca
If a VNF's port is connected to an internal network and the port is
created in an Incremental Module and the internal network is created
in the Base Module then the UUID of the internal network **MUST** be
exposed as a parameter in the ``outputs:`` section of the Base Module
and the port resource **MUST** use a ``get_param`` to obtain the network
UUID.
ONAP does not programmatically enforce a naming convention for
parameters for internal network. However, a naming convention is
provided that must be followed.
:ref:`ONAP Heat Resource ID and Parameter Naming Convention`
provides additional details.
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