The method, a communication system and communication device for establishing a communication relationship in at least one communication network

摘要

A method for establishing a communication relationship in at least one according to the internet protocol - communication network designed (access, okn),– in the case of the of a communications device (ke1.. n) at least one of the device of the communication relationship initiating message (dhcp - discover, dhcp - request) to the requirement of an ip - address in the at least one communication network (access, okn) are transmitted and at least one corresponding at least a requested ip - address return - message (dhcp - offer, dhcp - ack) with the aid of a round end - transmission method via the at least one communication network (access, okn) in the direction of the initiating communication device (ke1.. n) is transmitted,– in the case of which the communication relationship initiating communication device (ke1.. n) information representing (vcxindex, mac) in the at least one communication network (access, okn) are stored,– in the case of which the at least one with the aid of the round end - transmission method is transmitted by the return - message (dhcp - offer, dhcp - ack) and detected in the detected return - message (dhcp - offer, dhcp - ack) which is contained in the target - information (chaddr) with the stored information (vcxindex, mac) are compared,– in an at least partial agreement of the compared information (chaddr, vcxindex, mac)..