Network address translation

摘要

Address translation sufficient for use in translating addresses included in messages carried or otherwise transmitted between inside and outside network is contemplated. The contemplated address translation may facilitate operation of a network address translator (NAT), carrier grade network address translator (CGN), or other device similarly configured to facilitate translating inside addresses used to address messages carried over the inside network relative to outside addresses used to facilitate carrying messages over the outside network.

主权项

1. A network address translation system operable to translate network addresses between inside and outside network addresses, the system comprising:
a first network address translator (NAT) configured to translate a first plurality of inside addresses associated with a first plurality of messages relative to a first plurality of outside addresses, the first plurality of inside addresses addressing the first plurality of messages over a first inside network, the first plurality of outside addresses addressing the first plurality of messages over an outside network; a second NAT configured to translate a second plurality of inside addresses associated with a second plurality of messages relative to a second plurality of outside addresses, the second plurality of inside addresses addressing the second plurality of messages over a second inside network, the second plurality of outside addresses addressing the second plurality of messages over the outside network; wherein, in the event the first NAT experiences an overload condition: i) the first NAT translates the first plurality of inside addresses of overload messages relative to a second NAT address sufficient to address the overload messages to the second NAT, the overload messages being messages received by the first NAT while the overload condition is being experienced; and ii) the second NAT translates the second NAT address of the overload messages relative to the second plurality of outside addresses; wherein the second NAT translates the second plurality of outside addresses associated with each of a third plurality of responses generated in response to the overload messages to a first NAT address of the first NAT; and wherein the first NAT translates the first NAT address of the third plurality of responses to the first plurality of inside addresses associated therewith.