Inter-v4 realm routing

Details Inter-v4 realm routing Inter-v4 realm routing

2008-04-08

2008-04-08

Orgad, Edan (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S401000

Reexamination Certificate

active

10061553

ABSTRACT:
Packets may be forwarded between realms employing private unregistered addresses without the use of network address translation and/or application level gateways. Nodes within privately addressed realms are identified by a combination of their locally significant address and a globally significant realm address. The globally significant addresses are reserved in all realms for use as realm identifiers or inter-realm routing. To send a packet to a node within a distinct private realm, the packet is given an inner IP header designating the locally significant destination IP address of the target node within the remote realm and an encapsulation IP header indicating the globally significant address advertised by the gateway of the target node's realm. The globally significant address is used for forwarding outside the realm of the destination node. Once the packet reaches the destination realm, the locally significant address is used for forwarding.

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