On Sun, Jun 20, 2021 at 09:38:35PM -0400, Xin Long wrote: > Overview(From RFC8899): > > In contrast to PMTUD, Packetization Layer Path MTU Discovery > (PLPMTUD) [RFC4821] introduces a method that does not rely upon > reception and validation of PTB messages. It is therefore more > robust than Classical PMTUD. This has become the recommended > approach for implementing discovery of the PMTU [BCP145]. > > It uses a general strategy in which the PL sends probe packets to > search for the largest size of unfragmented datagram that can be sent > over a network path. Probe packets are sent to explore using a > larger packet size. If a probe packet is successfully delivered (as > determined by the PL), then the PLPMTU is raised to the size of the > successful probe. If a black hole is detected (e.g., where packets > of size PLPMTU are consistently not received), the method reduces the > PLPMTU. Thanks Xin! Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
