{"draft":"draft-ietf-tsvwg-udp-options-dplpmtud-15","doc_id":"RFC9869","title":"Datagram Packetization Layer Path MTU Discovery (DPLPMTUD) for UDP Options","authors":["G. Fairhurst","T. Jones"],"format":["HTML","TEXT","PDF","XML"],"page_count":"13","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Transport and Services Working Group","abstract":"This document specifies how a UDP Options sender implements Datagram\r\nPacketization Layer Path MTU Discovery (DPLPMTUD) as a robust method\r\nfor Path MTU Discovery (PMTUD). This method uses the UDP Options\r\npacketization layer. It allows an application to discover the largest\r\nsize of datagram that can be sent across a network path. It also\r\nprovides a way to allow the application to periodically verify the\r\ncurrent Maximum Packet Size (MPS) supported by a path and to update\r\nthis when required.","pub_date":"October 2025","keywords":["UDP","UDP-Options","PMTUD","PLPMTUD","DPLPMTUD","Datagram"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9869","errata_url":null}