Classifier is important data plane element in NSH based SFC solution. OpenDaylight sub-projects such as SFC and Netvirt leverage OVSDB and Openflow SB plugins to control OVS to act as a classifier. By leveraging VPP' N-tuple classifier feature and extend ACL to support RSP action, the VPP plus NSH_SFC plugin could also act as NSH classifier controlled by ODL Netconf SB plugin via HoneyComb agent.

The diagram about NSH Classifier design is located at https://drive.google.com/file/d/0B9ueih1QsxxyQ0VtYUZxWkZGUXM/view and initial patches
below in VPP and NSH_SFC will be refactored based on l2-classify and nsh_action
a) https://gerrit.fd.io/r/#/c/3173/ Add NSH Classifier feature in VPP
b) https://gerrit.fd.io/r/#/c/3174/ Draft: Add NSH Classifier feature in NSH_SFC

We expect this feature to hit 1701 release hence ODL Carbon release could use them in a integrated SFC solution.