Protection of transit links in a network
US7821970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Sep 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/025
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A router identifies transit links and non-transit links. Only the non-transit links are advertised as routes to adjacent routers, thereby protecting the transit links from edge traffic which terminates on a network on one of the transit links. In another aspect of the invention, an administrative whitelist supplements the routes which identify the transit link network routes. In another aspect of the invention, a method for advertising routes identifies entries in a router table as broadcast or point-to-point. Only the router table entries for point-to-point links which are not transit or broadcast links that are not for a neighboring router are advertised, whereas the point-to-point transit links or broadcast transit links are advertised as transit links if an administrative whitelist is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.