Source address validation for asymmetric routing
US11882019B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Dec 30, 2022 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Dec 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are described for providing a method and apparatus for determining source address validation of a data packet in a network in the presence of asymmetric routing. When a data packet is received by a node such as a router, a reverse path forwarding lookup is performed to determine if the data packet was received on a next-hop interface and if the reverse path forwarding fails, a Shortest Path First (SPF) computation at the router advertising the source route will be performed using the link state database to determine whether the data packet arrived from a valid path of the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.