Programmable disrupt of multicast packets for secure networks
US5539737A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Dec 30, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/44
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A secure repeater implementing data packet masking includes a programmable and selective, on a per port basis, multicast response. A multicast controller receives a multicast identifier extracted from a destination address field of a data packet. A plurality of memories, one associated with each port, determines the associated port's response to the multicast identifier. Each memory stores a multicast control code. When the multicast control code for a particular port has a value indicating that the associated port is enabled to receive multicast packets, assertion of the multicast identifier to the multicast controller for the particular port results in disabling the security masking for the port and subsequent transmission of unmodified data from the particular port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.