Apparatus and method for traffic filtering in a communication system
US7688818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2005 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Oct 12, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4641
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method includes receiving traffic through a first interface in a first group of interfaces at a switch. The first group of interfaces is associated with a first virtual network. The method also includes determining that the traffic is destined for a destination associated with a second virtual network and forwarding the traffic to a second interface in a second group of interfaces at the switch. The second group of interfaces is associated with the second virtual network. The method further includes filtering the traffic that is received at the second interface in the second group of interfaces and communicating the filtered traffic towards the destination. The first and second virtual networks could represent Virtual Local Area Networks associated with different network levels of a process control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.