Patent ID: 7471681
Filing Date: 2008-12-30
Classification: H04L

Abstract:
1. A method for tracking a largest transmission size available along a path between a sender and a recipient, comprising: transmitting from the sender a SYN packet addressed to the recipient, the SYN packet storing a first transmission size within a Record Maximum Transmission Unit (RTU) field of an IP options field; comparing with an intermediate device between the sender and the recipient, the first transmission size with a second transmission size associated with a network interface of the intermediate device; storing in the Record RTU field, the second transmission size within the received SYN packet if the second transmission size is less than the first transmission size; transmitting the SYN packet from the intermediate device to the recipient; comparing with the recipient, the transmission size stored in the Record RTU field with a third transmission size associated with a network interface of the recipient; and transmitting from the recipient to the sender a SYN/ACK response packet with the smallest of the first transmission size, the second transmission size and the third transmission size stored in a MSS Options field.