Edge node redundant system
US8331220B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Mar 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A client terminal at one location a is accommodated in an edge node (gateway) having a redundant configuration composed of a primary node and a secondary node. Normally a primary edge node PE A is used to enable communications with partner client terminals at locations b and c via opposing edge nodes PE B and PE C. Normally, a database storing the information of a label used by the primary edge node is synchronized with the database of the secondary edge node. A primary loopback address is stored in the secondary edge node and nullified. When the primary edge node fails, the loopback address of the primary edge node is validated and the secondary edge node restarts communications with the opposing edge nodes using the information of the database storing the information of the label used by the primary PE and the same label as the primary edge node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.