Router uses a single hierarchy independent routing table that includes a flag to look-up a series of next hop routers for routing packets
US6658481B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2000 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Apr 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/54
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a network processor-based device, there is provided a single routing table for network routers and an efficient routing algorithm implemented by the routing device. The routing table includes packet forwarding information including a subnet address associated with a destination address location, an ISO layer three (3) network protocol address, e.g., IP address, of a router interface that can route packets to the subnet address, and an identifier indicating whether that router is an exit BGP router that may or may not be directly attached to the packet forwarding router. A table look-up mechanism is provided to determine next hop information and determine associated BGP status of the next hop. At such time it is determined that a router is not a BGP router (i.e., is directly attached to the forwarding router), the packet will be transmitted to that router.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.