Patent · US Active

Automatically identifying an edge-facing router

US8576857B2 · kind B2 · utility

5Cited by

0References

25Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Hemant Singh · Bhangrola, IN
William Beebee · Acton, US
Ralph Droms · Boxborough, US
Ole Troan · Bergen, NO

Key dates

Filing date	Jan 22, 2010
Grant date	Nov 5, 2013
Priority date	—
Expiry date	Jun 9, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2101/659
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques for automatically identifying an edge-facing router in a network are provided. In one technique, data is obtained at a first router of a subscriber network. The data may be included in a DHCP message or a NDP RA message. The first router determines, based on the data, whether the first router is a service provider (SP)-facing router, which is a router that is coupled to a SP router and no other router in the subscriber network is logically between the SP-facing router and the SP router. If it is determined that the first router is an SP-facing router, then the first router stores identification data that identifies the first router as an SP-facing router. Otherwise, the first router stores identification data that identifies the first router as a non-SP-facing router.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.