The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2004
Filed:
Apr. 07, 2000
Vipin Kumar Jain, Santa Clara, CA (US);
Cynthia M. Jung, Menlo Park, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
The present invention is drawn to an system and a method for configuring subnets within a switch network that is typically comprised of switches and a router coupled together via a common shared bus. In one embodiment, a VLAN-defined (virtual local area network-defined) subnet is configured by mapping a subnet to a VLAN. All subnet members share a single VLAN ID irrespective of device boundaries of the switch network. In particular, in contrast to the span of a conventional subnet, the span of the VLAN-defined subnet is not required to be confined within a single switch's device boundary. As such, the present invention provides flexibility in configuring subnets. Moreover, an intra-VLAN packet forwarding mechanism is provided for said VLAN-defined subnet such that a packet can be transmitted between any two subnet members. This intra-VLAN packet forwarding mechanism avoids routing even when the VLAN-defined subnet spans more than one switch. Advantageously, packet transmission bottleneck found typically in the router is eliminated. Finally, in the presence of other of similarly configured VLAN-defined VLAN's, inter-VLAN packet forwarding can be provided flexibly with or without routing.