Methods and apparatus to infer the status of border gateway protocol sessions
US7894461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | May 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus to infer the status of BGP sessions are disclosed. A disclosed example method comprises querying a configuration file of a router of a first AS to identify a BGP session to a second AS, querying the file to determine whether the BGP session is a single hop, when the BGP session is a single hop, setting a status flag to a first value, querying the file to determine whether there is a valid IP configuration for the BGP session, when there is a valid IP configuration, setting the status flag to a second value, querying a router syslog file for the router to identify a syslog message associated with the BGP session, determining whether the session is stale, and when the session is not stale and the status flag is set to the second value, adding the second AS to a list of actual AS neighbors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.