Determining a maximum transmission unit which may be transmitted over a particular route through a network

摘要

A method of routing information in a data network comprises the steps of transmitting (220) a test data packet from a source node (355) to a destination node (375) via a number of intermediate nodes (360, 365, 370), wherein the test data packet contains a first maximum transmission unit (MTU) value. The method further comprises the steps of receiving the test data packet by at least one intermediate node which compares (230) the first maximum transmission unit value to a second maximum transmission unit value applicable to the at least one intermediate node. In response to the comparison the method further comprises the step of replacing (235) the first maximum transmission unit value with the second maximum transmission unit value, preferably when the intermediate node operates with a lower MTU value. The proposed mechanism enables an optimal MTU for a particular route to be determined in a more efficient manner. A communication or computing node and related data network are also provided.