http://pedrormarques.wordpress.com/ 但是LDP L2VPN 的前車之鑑.... key takeaways "But classifying flows is a function that must be implemented as distributed as possible in any system that is designed to do anything more than be an educational tool." " It is encouraging that a few years into the OpenFlow meme the majority of the people that initially ignored “networking 101″ have managed to re-discover it. Hopefully in a couple more years we can collectively move on." "Back to networking: In a CLOS fabric design there is no aggregation layer. That is the mission of the OpenContrail vrouter. Provide the ability to route traffic between networks with the necessary levels of policy control, in a distributed way."