网络安全检测|网络安全服务|网络安全扫描-香港墨客投资移动版

In this paper, we propose one heuristic scheme for incremen- tally deploy SDN switches in hybrid SDNs, the objective of which is to achieve energy saving by rerouting the flows to shut down idle links and switches as many as possible. Taking into account the constraints, we propose two general questions: 1) given a lim- ited number of SDN switches, how to place them to achieve the maximum NCA improvement? 2) Fixed SDN switches deployment location, how to maximizing energy savings by rerouting the flows. The hardness of the two questions are proved. Then we propose the heuristic algorithms to solve them. The simulation shows that our scheme can achieve 95% of the number of flows controlled with only about 10% upgrading cost, and it also can achieve saving more about 10% of the total power consumption when compared to the existing solutions. In the next work, we will try to improve the quality of service (QoS) through packet classification or traffic engineering based on the controllable flows.

Acknowledgements

This research is supported in part by the 973 Program of China (No. 2012CB315803), the National Natural Science Foundation of China (No. 61402255), and the Research Fund for the Doctoral Pro- gram of Higher Education of China (No. JSGG20150512162853495, No.Shenfagai[2015]986, and JCYJ20150630170146830). The research is also supported by the National Natural Science Foundation of China under Grant 61625203, the National Key R and D Program of China under Grant 2016YFC0901605, the R and D Program of Shenzhen under Grant JCYJ20170307153157440 and JCYJ20160531174259309. 

(责编：尹峥、赵光霞)