Temporary unique private address

In a data communication network including a first forwarding node associated with a first site, a second forwarding node associated with a second site, and a first mobile node having a first address visiting the second site from the first site, the second forwarding node comprising:

• an input for receiving inbound packets;
• an output for forwarding outbound packets;
• a memory for storing a second address of a second mobile node visiting the second site;
• and
• a registration engine coupled to the input, output, and memory, characterized in that the registration engine receives via the input a registration request packet including the first address, searches the memory for determining whether the first address is the same as the second address, selects a third address for the first mobile node if the first address is the same as the second address, and transmits the third address via the output.

In a data communication network including a first forwarding node associated with a first site, a second forwarding node associated with a second site, and a mobile node visiting the second site from the first site, the first forwarding node comprising:

• an input for receiving an inbound packets;
• an output for forwarding an outbound packets;
• a memory for associating the mobile node to a particular address;
• an encapsulation engine coupled to the input, output, and memory, characterized in that a first packet addressed to the mobile node is received by the input and encapsulated by the encapsulation engine into a second packet having the particular address as a destination address, the second packet being further encapsulated into a third packet and transmitted to the second forwarding node via the output.

In a data communication network including a first forwarding node associated with a first site, a second forwarding node associated with a second site, and a mobile node with a first address visiting the second site from the first site, the mobile node comprising:

• an input for receiving inbound packets;
• an output for transmitting outbound packets;
• and
• a registration engine coupled to the input and the output, characterized in that the registration engine transmits via the output a first registration request packet including the first address, receives via the input a registration reply packet including a second address, and transmits via the output a second registration request packet including the second address.

In a data communication network including a first forwarding node associated with a first site, a second forwarding node associated with a second site, and a first mobile node with a first address visiting the second site from the first site, a method for providing routing support for the first mobile node, the method comprising:

• determining whether a second mobile node visiting the second site has the same first address as the first mobile node;
• selecting a second address for the first mobile node if the second mobile node has the same first address;
• and
• transmitting the second address to the first forwarding node for using to forward packets addressed to the first mobile node.

In a data communication network including a first forwarding node associated with a first site, a second forwarding node associated with a second site, and a mobile node visiting the second site from the first site, a method for providing routing support for the first mobile node, the method comprising:

• receiving a registration request transmitted by the mobile node, the registration request including a particular address;
• associating the mobile node to the particular address;
• receiving a first packet addressed to the mobile node;
• encapsulating the first packet into a second packet, the second packet having the particular address as a destination address;
• encapsulating the second packet into a third packet;
• and
• transmitting the third packet to the second forwarding node.