Extensions to the Path Computation Element Communication Protocol (PCEP) for Utilizing Bit Error Rate (BER) Metrics

IGP Traffic Engineering (TE) Metric Extensions describe mechanisms with which network performance information is distributed via OSPF IS-IS, and BGP-LS, respectively. The Path Computation Element Communication Protocol (PCEP) provides mechanisms for Path Computation Elements (PCEs) to perform path computations in response to Path Computation Client (PCC) requests. This document describes the extension to PCEP to utilize Bit Error Rate (BER) and Packet Error Rate (PER) as constraints for end-to-end path computation.