Support of Physical Deployment Units in a VNF

Change-Id: I0839aaee88c6a451f4b4e294923ce70753ecb4d9
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

diff --git a/Release5/Support_of_Physical_Deployment_Units_in_a_VNF.md b/Release5/Support_of_Physical_Deployment_Units_in_a_VNF.md
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+# Support of Physical Deployment Units in a VNF #
+
+## Proposer ##
+- Gerardo Garcia (Telefonica)
+- Alfonso Tierno (Telefonica)
+- Francisco Javier Ramon (Telefonica)
+
+## Type ##
+**Feature**
+
+## Target MDG/TF ##
+SO, RO
+
+## Description ##
+**This feature obsoletes feature #641: https://osm.etsi.org/gerrit/#/c/641/**
+
+This feature aims to enable the use of Network Functions where some of their 
+Deployment Units are physical (Physical Deployment Units - PDUs), so both pure 
+VNFs, pure PNFs and hybrid network functions can be seamlessly supported in an 
+interchangeable manner in a NS.
+
+This feature is also expected to require a specific procedure to add PDUs to a 
+catalog per datacenter, where details of their type (so that they can be 
+pooled. e.g. GPU model),  location (datacenter), reachability (e.g. IP 
+address), physical connections to the site (e.g. switches and ports where the 
+PDU is connected), etc. can be provided.
+
+In this phase, it will be assumed that, on time of instantiation, these PDUs 
+would map 1-to-1 to VDU instances (or equivalent). In this phase, the same PDU 
+cannot be used twice (in the future we might review this approach).
+
+## Demo or definition of done ##
+- Successful onboarding of a (V)NF that has 1 VDU and 1 PDU. For instance, in 
+the (V)NF, the VDU could be an SDN controller and the PDU a small physical 
+switch.
+- Addition a PDUs in datacenter A of a given type.
+- Successful deployment of a NS with the (V)NF in datacenter A.
+- Unsuccessful deployment of a second instance of the same NS in the datacenter 
+A (not enough resources available of that PDU type).
+- Unsuccessful deployment of the same NS in another datacenter (no PDUs of that 
+type available).
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