BGP link-state extensions for segment routing
US9660897B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2014 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Jul 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Mechanisms are described by which link state “path” information can be collected from networks and shared with external components, such as routers or centralized controllers or path computation elements, using an exterior gateway protocol, such as the Border Gateway Protocol. That is, the link state information for multiple interior gateway protocol (IGP) routing domains is shared between external components using the exterior gateway protocol, such as BGP. As such, the techniques described herein allow link state information to be shared across different routing domains, such as routing and reachability information shared between different autonomous systems. The extensions described herein allow an exterior gateway protocol to be used to signal explicit path segments within IPG routing domains so as to set up an overall path that spans the multiple IPG routing domains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.