- Service chaining provides a common way to deliver multiple services in a specific order, decoupling network topology from services and enabling dynamic service insertion. - It has both a data plane, using a common service header (NSH) to build service chains, and a control plane for policy and mapping overlay addresses to the physical network. - Work has included implementing NSH encapsulation/decap in OVS and adding WireShark support, with ongoing work on LISP integration and control plane functionality.