Hi, my name is Pradeep HK and I am from Juniper Networks, Bangalore. I have prepared a Design Document for the feature mentioned in the subject. It is being targetted for 4.4.
Pls review the Design document - https://cwiki.apache.org/confluence/display/CLOUDSTACK/Cloudstack+network-element+plugin+to+orchestrate+Juniper%27s+switches+%28for+L2+services%29 and send me your comments -Pradeep