ROUTER HAVING MAXIMUM TRANSMISSION UNIT CONTROL FUNCTION FOR EXTERNAL NETWORK INTERFACE AND METHOD THEREOF

摘要

PURPOSE: A router having MTU(Maximum Transmission Unit) control function for external network interface and its method are provided to allow one router to smoothly exchange information with the other router by abstracting an MTU by segmenting and assembling transmission/reception packets into a certain data amount. CONSTITUTION: A routing processor(110) forms at least one physical external network interface into a logical virtual network interface. A line card processor(140) includes the external network interface. If an MTU of the external network interface is greater than an MTU supported by data communication channel in a router, the routing processor(110) and the line card processor(150) abstract the MTU of the external network interface by segmenting and assembling packets transmitted and received between processors into a certain data amount.