RFC 8899
Internet Engineering Task Force (IETF) G. Fairhurst Request for Comments: 8899 T. Jones Updates: 4821, 4960, 6951, 8085, 8261 University of Aberdeen Category: Standards Track M. Tüxen ISSN: 2070-1721 I. Rüngeler T. Völker Münster University of Applied Sciences September 2020 Packetization Layer Path MTU Discovery for Datagram Transports Abstract This document specifies Datagram Packetization Layer Path MTU Discovery (DPLPMTUD). This is a robust method for Path MTU Discovery (PMTUD) for datagram Packetization Layers (PLs). It allows a PL, or a datagram application that uses a PL, to discover whether a network path can support the current size of datagram. This can be used to detect and reduce the message size when a sender encounters a packet black hole. It can also probe a network path to discover whether the maximum…