Juniper Networks, Inc.
Apparatus, system, and method for discovering path maximum transmission units

Abstract:

A disclosed method may include (1) generating a test packet that includes an inner packet encapsulated within an outer packet, (2) adding, to the test packet, an amount of padding data that increases a total size of the test packet to a certain threshold, (3) forwarding, via a transport layer protocol, the test packet along a network path that leads from a source node to a destination node by way of a tunnel, (4) receiving the inner packet from the destination node after the destination node extracts the inner packet from the test packet, and (5) determining, based at least in part on receiving the inner packet from the destination node, that a maximum transmission unit of the network path is greater than or equal to the total size of the test packet as increased by the amount of padding data. Various other apparatuses, systems, and methods are also disclosed.