Although many metrics for the performance and utilization of the Network Function Virtualisation Infrastructure (NFVI) components have been in wide use for many years, there were no independent specifications to support consistent metric development and interpretation. The present document provides the needed specifications for key NFVI metrics.
 
The present document specifies detailed and vendor-agnostic key operational performance metrics at different layers of the NFVI, especially processor usage and network interface usage metrics. These metrics are expected to serve as references for processed and time-aggregated measurement values for performance management information that traverses the Or-Vi and/or Vi-Vnfm reference points of the NFV architectural framework. The present document contains normative provisions.