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:
Dec. 31, 2002
Filed:
Feb. 25, 1999
Donald Robert Pannell, Cupertino, CA (US);
Robert D. Hemming, Ben Lomond, CA (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
Modules of a network switch receive data transmissions from network stations via its I/O ports, each data transmission including an address of a source network station sending the transmission and an address of a destination station to receive the transmission. Each module receiving a data transmission either passes it on to a next module of the network switch via a ring bus or forwards it to the destination station when it is accessible via one of the module's own I/O ports. Each module includes an address translation unit mapping the network address of each station to the particular I/O port though which that network station communicates. The address translation unit updates its address-to-port mapping when a data transmission arrives at an I/O port from a source station having an unmapped or incorrectly mapped address, and then sends a mapping instruction to address translation units of all other switch modules via the ring bus telling them to similarly update their network address mappings.