Method and system for routing data traffic

A media gateway for interfacing with a first network,

• comprising a router, a WAN interface and at least one LAN interface connected to the router, wherein the media gateway is arranged
• for providing network connectivity functionality in a combination of a first network connection formed by the media gateway and a second network connection formed by a generic gateway,
• a first group of IP clients being connected to the media gateway, and a second group of IP clients being connected to the generic gateway,
• wherein the media gateway is arranged to receive from the generic gateway local IP addresses associated with the first group of IP clients,
• wherein an attachment link is provided between the media gateway and the generic gateway
• wherein the media gateway comprises a router part and LAN interfaces, and the media gateway in a boot-up process is configured to:
• block all incoming and outgoing DHCP traffic on the LAN interfaces, except from the attachment link where outgoing DHCP request and incoming DHCP replies will be allowed;
• send out a DHCP request for the router part of the media gateway over the attachment link;
• receive from the generic gateway a DHCP response over the attachment link:
• configure the router part of the media gateway with the IP address thus obtained:
• send out DHCP requests for a configurable number of dummy clients using locally administered private MAC-addresses over the attachment link;
• receive from the generic gateway DHCP responses over the attachment link, such that for each privately administered MAC-address a valid set of IP address parameters is obtained by the media gateway;
• save the sets of IP address parameters;
• enable a DHCP server comprised in the media gateway:
• enable DHCP in- and outgoing traffic for the DHCP server of the media gateway, except on the attachment link where only outgoing DHCP requests and incoming DHCP replies for the DHCP client are allowed.