Internal substitution bi-level addressing for compatible public networks
First Claim
1. A method for addressing and directing traffic in a compatible public network, comprising:
- receiving an original signal at an ingress capable network device in the compatible public network and that includes a destination service address;
forwarding a destination address identifier corresponding to the destination service address to a local naming system including at least one look-up table having registered pairs of destination address identifiers and internal routing addresses internal to the compatible public network;
performing a look-up between the destination address identifier and at least one internal routing address corresponding thereto;
returning at least one internal routing address to the ingress capable network device from the local naming system;
substituting the destination address identifier with the internal routing address in a transit signal corresponding to the original signal while retaining said destination address identifier in a separate portion of said transit signal;
routing said transit signal from the ingress capable network device through the compatible public network to an egress capable network device at the internal routing address;
removing the internal routing address from said transit signal at said egress capable network device;
restoring the destination service address to said transit signal; and
forwarding said transit signal from the egress capable network device according to the destination service address.
1 Assignment
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Accused Products
Abstract
A system operable among compatible public networks, such as ATM networks, recognizes signals having external service addresses entering a controlled compatible public network. External service addresses are checked against a look-up of internal routing addresses that are generally only recognized and/or advertised within the controlled compatible public network, and that represent egress terminating interfaces. The external service address is replaced with the internal routing address, although the external service address is retained and transported. Routing to the egress terminating interface in the controlled compatible network is performed on the internal routing address only, without reference to the external service address. At the egress terminating interface, the internal routing address is discarded, and the external service address restored, as the signals are forwarded to the next entity, which is usually a connected compatible network or end system. The signals having external service addresses traverse the entire controlled compatible network without any internal system requiring external service address handling capability.
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Citations
27 Claims
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1. A method for addressing and directing traffic in a compatible public network, comprising:
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receiving an original signal at an ingress capable network device in the compatible public network and that includes a destination service address; forwarding a destination address identifier corresponding to the destination service address to a local naming system including at least one look-up table having registered pairs of destination address identifiers and internal routing addresses internal to the compatible public network; performing a look-up between the destination address identifier and at least one internal routing address corresponding thereto; returning at least one internal routing address to the ingress capable network device from the local naming system; substituting the destination address identifier with the internal routing address in a transit signal corresponding to the original signal while retaining said destination address identifier in a separate portion of said transit signal; routing said transit signal from the ingress capable network device through the compatible public network to an egress capable network device at the internal routing address; removing the internal routing address from said transit signal at said egress capable network device; restoring the destination service address to said transit signal; and forwarding said transit signal from the egress capable network device according to the destination service address. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for addressing and directing traffic in a compatible public network, comprising:
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a local naming system server including at least one look-up table having registered pairs of destination service addresses and internal routing addresses internal to the compatible public network; at least one ingress capable network device that receives an original signal including a destination service address embedded therein, said at least one ingress capable network device including at least one interface for receiving signals having destination service addresses, at least one interface to the local naming system server through which look-up query signals are sent and internal routing addresses corresponding to the destination service addresses are received, and at least one internal routing and traffic carrying interface for routing at least transit signals corresponding to the received signals through the compatible public network, according to said internal routing address, while retaining the destination service addresses in respective portions of the transit signals; and at least one egress capable network device that receives the at least transit signals routed according to said internal routing addresses and that restores said destination service addresses and forwards the at least transit signals from said compatible public network. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A system for addressing and directing traffic in a compatible public network, comprising:
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a local naming system server including at least one look-up table having registered pairs of destination service addresses and internal routing addresses internal to the compatible public network, and having registered pairs of destination compatible network identifying codes and internal routing addresses internal to the compatible public network; at least one ingress capable network device that receives an original signal including a destination service address embedded therein, said at least one ingress capable network device including at least one interface for receiving signals having destination service addresses, at least one interface to the local naming system server through which look-up query signals are sent and internal routing addresses corresponding to the destination service addresses are received, and at least one internal routing and traffic carrying interface for routing at least transit signals corresponding to the received signals through the compatible public network, according to said internal routing address; and at least one egress capable network device that receives the at least transit signals routed according to said internal routing addresses and that restores said destination service addresses and forwards the at least transit signals from said compatible public network; wherein said local naming system server checks in said at least one look-up table whether at least one internal routing address corresponding to the destination service address is present in said registered pairs, and when at least one internal routing address is not present in said registered pairs, obtains from said at least one look-up table a destination compatible network identifying code corresponding to the destination address identifier, and returns at least one destination compatible network identifying code to the ingress capable network device. - View Dependent Claims (17, 18)
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19. A set of data signals embodied in a propagation medium within a compatible public network, the signals enabling routing of network traffic, and said set of data signals comprising:
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a first signal from an ingress capable network device to a local naming system, the local naming system including at least one look-up table having registered pairs of destination address identifiers and internal routing addresses internal to the compatible public network, said first signal including a query structure having the destination address identifier embedded therein; a second signal from the local naming system to the ingress capable network device, said second signal including a query response structure having at least one returned internal routing address corresponding to the destination address identifier corresponding to a destination service address embedded therein; a third signal from the ingress capable network device and traversing the compatible public network to an egress capable network device at said at least one returned internal routing address, said third signal including routing information determining a path traversing internal network devices of the compatible public network to said at least one returned internal routing address and an address transport structure having said destination service address embedded therein; and a fourth signal sent from said egress capable network device, said fourth signal including said destination service address. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification