Methods and apparatus for filtering packets for preventing packet reorder and duplication in a network
US7453873B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2003 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Feb 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/427
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are disclosed for identifying the relevancy of packets. In one embodiment, source addresses are associated with network topology indications. When a packet is received, its network topology indication is compared with the corresponding one retrieved from a data structure to determine whether to drop the packet. Source addresses may also be associated with authorized interfaces to determine whether a packet was received on an authorized interface. In one embodiment, a maintained network topology indication is associated with a packet. After it is processed, the corresponding latest network topology indication is retrieved and compared with that previously associated with the packet. In one embodiment, upon a change in a network topology indication associated with an interface, control packets are placed in each of the queues corresponding to the destination interface, so it can be readily identified when this update has been propagated through the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.