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+# Support of high level primitives in SDN plugin model for SDN assist #
+
+## Proposer ##
+- Gerardo Garcia (Telefonica)
+- Alfonso Tierno (Telefonica)
+- Francisco Javier Ramon (Telefonica)
+
+## Type ##
+**Feature**
+
+## Target MDG/TF ##
+RO
+
+## Description ##
+The SDN plugin model in OSM assumes the existence of a set of calls in the
+plugin that allow RO to interact with different but equivalent primitives from
+various SDN controllers in an homogeneous fashion.
+
+The current set of calls assumes the availability of a number of basic
+flow-level provided by the SDN Controller, letting the RO assume the logic to
+create the various kinds of underlay networks supported by OSM, namely E-Line
+and E-LAN types.
+
+While this model of use might be a reasonable approach for many cases, it might
+be suboptimal for modern SDN controllers, which can be already capable of
+providing high level API operations to set up E-LAN and/or E-Line connections
+(and even prevent the use of flow-level operations.
+
+This feature proposes to augment the current SDN plugin model to support also
+CRUD operations for complete networks, leveraging on existing API calls of
+modern SDN controllers.
+
+## Demo or definition of done ##
+Show that it is possible to create, read, update and delete underlay
+connections of E-LAN and E-line types with, at least, one of the supported
+types of SDN controllers.
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