Patent ID: 7542471

Claim:
A method for performing by proxies discovery of a maximum transmission unit of a path between a client and a sewer in a more efficient manner, the method comprising the steps of: (a) determining, by a first proxy, a size for a path maximum transmission unit (PMTU) for transmitting network packets between a client and a server by increasing a value of the PMTU by a predetermined percentage for each round-trip-time that elapses without receipt of an indication that fragmentation has occurred; (b) repacketizing, by the first proxy, packets received from the client for transmission to the sewer into packet sizes in accordance with the size of the PMTU; (c) transmitting, by the first proxy, the repacketized packets to the server; (d) detecting, by a second proxy, a packet received from transmission of repacketized packets from the first proxy is fragmented; and (e) transmitting, by the second proxy to the first proxy in response to the detection, an acknowledgement packet marked with an indicator that fragmentation has occurred.