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Demonstrates improved service function chaining in hybrid optical/electrical DCNs, suggesting better performance.
The advances on hybrid optical/electrical DCNs (HOE-DCNs) make it easier to support network function virtualization (NFV) with various quality-of-service (QoS) demands. However, the existing approaches for NFV orchestration rely heavily on the control plane, which might lead to scalability and performance issues. In this work, we propose to offload certain network orchestration tasks from the control plane to top-of-rack (ToR) switches, by leveraging the flexibility of programmable data plane (PDP). Specifically, we architect an HOE-DCN whose ToR switches are PDP switches, design the network orchestration system for it, and program the ToR switches, such that they can make quick decisions locally to assist the control plane to provision the service chains of virtual network functions (vNF-SCs) agilely. We prototype our proposal in a small-scale HOE-DCN testbed, and the experimental results show that without much involvement of the control plane, the ToR switches can make local decisions and readjust the provisioning schemes of vNF-SCs adaptively to satisfy their QoS demands.
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Peng et al. (2021) studied this question.
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