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-.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-.. http://creativecommons.org/licenses/by/4.0
-
-================
-1. vRNC Topology
-================
-
-The simple vRNC topology is shown below: :numref:`figure_topo`
-
-.. figure:: images/vRNC_Topology.png
-   :name: figure_topo
-   :width: 100%
-
-   vRNC Topology
-
--  vRNC includes four networks: EMS\_network, CTRL\_network,
-   Intermedia\_network and extermedia\_network;
--  vRNC includes four node types: MM, LB, CM and DM;
--  MM: Stands for Maintain Module, which links to EMS\_network,
-   CTRL\_network and extermedia\_network. It composes of active vdu and
-   standby vdu.
--  CM: Stands for Control Module, which links to CTRL\_network and
-   intermedia\_network. All CM nodes form resource pool and each node
-   composes of active vdu and standby vdu.
--  DM: Stands for Data Module, which links to CTRL\_network and
-   intermedia\_network. All DM nodes form resource pool and each node is
-   a vdu.
--  LB: Stands for LineCard Module, which links to CTRL\_network and
-   intermedia\_network and extermedia\_network. All LB nodes form
-   resource pool and each node is a vdu.
-
-2. vRNC Definition
-==================
-
-The files dependency and correspoding specificaiton of vRNC definition
-are shown below: :numref:`figure_def`
-
-.. figure:: images/vRNC_Definition.png
-   :name: figure_def
-   :width: 100%
-
-   vRNC Definition
-
--  TOSCA\_definition\_1.0.yaml should be the lastest version, which is
-   updated by tosca-parser community, but some keywords (such as
-   substitution\_mappings) in the correspoding standard of
-   "TOSCA-simple-profile-YAML-v1.0" is not supported.
--  TOSCA\_nfv\_definition\_1.0.yaml is a new file, and not implemented
-   in code, and the correspoding standard of
-   "tosca-nfv-v1.0-wd02-rev02" is not complete now.