Analyzing and Researching on Path MTU Discovery Algorithm
Packets on the network to be transmitted to the target site,the packet length can not exceed the value of PMTU. Study of the Path MTU Discovery Method is designed to encapsulate large IP packet to improve network resource utilization. The mechanic of datagram fragmentation is analyzed. The current main PMTU discovery algorithms,such as increase algorithm,decrease algorithm,and hierarchical algorithm are researched.Based on the above algorithms an improved PMTU discovery algorithm has been proposed and implemented. After testing on various sites,the result indicates that the improved algorithm reduces the number of packets to be send and the detect PMTU value is more accurate.