Abstract: The present invention is related to a method to control and to change dynamically a MAC address in an aggregation network containing at least a server computer device and a client device, comprising the steps of: Sending from said client device to a server computer device a message (1,11) containing the MAC address of said client computer device, Retrieving said MAC address from said message at said server computer device (2,12), Checking if said MAC address is already in use (by a user) in said network or if said server computer device wants to change all MAC addresses in said network, If so, sending from said server computer device to said client device a message (3,13) containing a new MAC address for said client, Overwriting said MAC address with said new MAC address in said client computer device (4,14).

Abstract: The present invention relates to a method for establishing a path, having a certain QOS-class, between a modem and an edge node over a communications network. The communications network comprises an Access Multiplexer and an Ethernet aggregation network, where the Access Multiplexer couples the modem to the Ethernet aggregation network. The modem is coupled to the Access Multiplexer over at least one ATM connection. The modem forwards an ARP request, that is received from a host terminal, for an address of the edge Node over an ATM having a certain QOS-class. The Access Multiplexer intercepts the ARP request that is forwarded by the modem and assigns a chosen address for the edge node based on information on the edge node that is contained in the ARP request. Subsequently, the Access Multiplexer includes this chosen address in an ARP reply.