In-band Performance Measurement Using UDP Path for Segment Routing Networks

Segment Routing (SR) is applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6 (SRv6) data planes. This document specifies procedures for using UDP path for sending and processing in- band probe query and response messages for Performance Measurement. The procedure uses the RFC 6374 defined mechanisms for Delay and Loss performance measurement. The procedure specified is applicable to SR- MPLS and SRv6 data planes for both links and end-to-end measurement for SR Policies. In addition, this document defines Return Path TLV for two-way performance measurement and Block Number TLV for loss measurement.