Stateful redundancy for deterministic carrier-grade network address translation (NAT) services
US11665131B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2022 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Sep 13, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1004
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A carrier-grade network address translation (NAT) gateway system includes a switch having a gateway function configured to receive packets that are communicated via its ingress and egress ports. The switch having the gateway function has a first link to a first NAT processing function and a second link to a second NAT processing function. The first NAT processing function has a first deterministic address/port translation function and a first mapping table for storing first binding entries. The second NAT processing function has a second deterministic address/port translation function and a second mapping table for storing second binding entries. Preferably, the first and the second deterministic address/port translation functions are the same. The switch is configured to communicate each received packet for processing at both the first and the second NAT processing functions (e.g., in either a serial manner or a parallel manner), which provides redundancy in state information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.