Forwarding packets in a gateway performing network address translation (NAT)
US7586940B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Feb 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/7453
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A gateway device providing a search utility to determine both NAT information and forwarding information (“both pieces of information”) in a single search operation. The single search operation may be implemented using a single table storing both pieces of information necessary for processing a packet. As a result, both pieces of information can be potentially retrieved in a single memory access. Due to the single (or few) memory access, the throughput performance of a gateway may be enhanced. In an embodiment, the gateway is implemented as a service selection gateway which provides connectivity between multiple remote systems and service domains. The NAT/forwarding information is partitioned according to service domains such that the information needed to process packets from/to the same service domain is contained in the same table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.