| Authors: | |
| Olufemi Odegbile | |
| Shigang Chen | |
| Youlin Zhang |
One Sentence Summary:
proposes a hybrid SDNlabel switching scheme
Abstract:
-Software-defined networks facilitate automatic policy enforcement with dynamic routing of flows through a sequence of middleboxes that offer the required network functions. As a result, network policy enforcement based on middleboxes, which is tedious and error-prone to perform in traditional IP networks, is greatly simplified. However, TCAM-based flow tables in SDN are small and energy-demanding, which limits the scalability of policy enforcement. This paper proposes a hybrid SDNlabel switching scheme that combines TCAM-based switching (in SDN) at the network edge with label switching in the network core to provide scalable policy enforcement without compromising per-flow management capability. A linear optimization is proposed to balance workloads among the middleboxes. We demonstrate on OMNET++ that our proposed solution incurs much smaller processing/communication overhead and achieves better load-balancing when comparing with the prior art.