Multi-homing using controlled route leakage at a backup service provider
US7630392B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 2005 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | May 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A technique for implementing route aggregation in a computer network containing a multi-homed customer site connected to primary and second networks, which in turn are both connected to a common “backbone” network. According to the technique, the primary network allocates a block of network addresses for the customer site, and the customer site notifies the secondary network of its allocated addresses. The secondary network first determines whether the primary network has already advertised an aggregated route which incorporates the customer site's route. If so, the secondary network “suppresses” (i.e., does not advertise) the customer site's route. The secondary network only “unsuppresses” the customer site's route if it detects that the primary network has lost connectivity to the customer site and/or the backbone network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.