Methods are described to perform service chaining on a physical switch for virtual services. First, the switch observes and classifies Local Area Network (LAN) traffic, and determines that it needs to apply a service chaining rule based on classification results. Second, the switch forwards the traffic to the first Virtual LAN (VLAN) in the input chain. When the frame is processed by the container / Virtual Machine (VM), it forwards the traffic on the egress VLAN, which is used as an input to the next element in the chain.
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Sundararajan, Balaji; Sharma, Samar; and Lakshmanan, Yegappan, "LAYER 4 THROUGH LAYER 7 SERVICE CHAINING FOR VIRTUAL NETWORK FUNCTIONS IN CLOUD ENVIRONMENT", Technical Disclosure Commons, (May 31, 2018)