Hello community,

Reading current ONAP architecture [1] and tutorial of setting up the base ONAP 
stack [2], I have a few questions regarding those controllers:

-          SDN Agent:

o   What is the role, features and functions of SDN Agent? How is it different 
from Network Controller?

o   I couldn't find any code of SDN Agent in ONAP repo [3]. Does anyone know 
where it is?

-          Infrastructure Controller:

o   Is it OpenStack Nova? Or is it agnostic of any VIM and OpenStack is just 
one of the VIM?

o   If the intention is to be agnostic of VIM, and support other VIMs, where is 
a plugin/adaptor from architecture point of view?

o   I couldn't find code either in ONAP [3]. Does anyone know where it is?

-          Network Controller:

o   Is it OpenStack Neutron or ODL? Or Neutron with ODL as backend?

o   I found the code in [3], but it seems it only installs ODL there (correct 
me if I am wrong).

o   What is the primary role, features and functions of Network Controller 
other than those in ODL?

-          App Controller:

o   Are we using ODL too as App Controller?

o   Or Is it a container orchestrator or something else?

Appreciate if someone can explain some details, or give the pointer to more 
detailed documentation.

Thanks
Bin

[1] https://wiki.onap.org/display/DW/ONAP at 
ONS2017?preview=/3245268/3245303/ONAP%20Architecture%20Overview%20_Final-1.pdf
[2] 
https://wiki.onap.org/display/DW/Tutorial%3A+Configuring+and+Starting+Up+the+Base+ONAP+Stack
[3] https://git.onap.org/

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