China Mobile China Mobile Centec Centec Centec Inesa SAIA This document specifies procedures for configuring Simple Two-Way Active Measurement Protocol (STAMP) sessions so that test packets traverse the same ECMP or LAG forwarding path as a specified production flow. In networks that use hash-based load distribution, the forwarding path depends on a hash over packet header fields. Standard STAMP test packets carry session-specific addresses and ports that differ from production traffic, often selecting a different forwarding path and yielding measurements that do not represent the actual service quality of the production flow. The procedures in this document specify how the Session-Sender populates test packet headers with values matching a designated production flow. The Session-Reflector identifies test packets by validating the STAMP payload structure. No changes to the STAMP packet formats defined in RFC 8762 are required.