Patent ID: 8094565
Filing Date: 2012-01-10
Classification: H04L,H04W

Abstract:
1. A method for loop detection in data packet communication utilizing a tunnel in a network comprising a plurality of nodes, the method comprising the steps of: when a first node transmits a data packet: encoding an identification of the first node in at least two header fields of the data packet to be transmitted, and when the first node receives a data packet: analyzing at least two header fields of the received data packet, and deciding if a loop exists by determining if the received data packet is the transmitted data packet sent by the first node itself, based on the analysis of the at least two header fields of the received data packet, wherein the at least two header fields of the transmitted data packet and the received data packet are tunnel encapsulation limit fields of an extended IPv6 header, and the method further comprises the step of: reducing a value of bytes in the tunnel encapsulation limit fields by 1 in each node in the network that further encapsulates the transmitted data packet.