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. 13, 2010
Filed:
Sep. 13, 2007
Nafea Bishara, San Jose, CA (US);
Tsahi Daniel, Tel-Aviv, IL;
Amit Avivi, Kfar-Saba, IL;
Marvell Israel (M.I.S.L) Ltd., Yokneam, IL;
Marvell International Ltd., Hamilton, BM;
Abstract
A stack unit for a stackable network switch, the stack unit having corresponding methods and computer programs, comprises a network port to exchange packets with a network; two stacking interfaces each to exchange the packets over a respective stacking link with another stack unit, wherein each stacking interface is assigned to the other stacking interface as an alternate stacking interface; and a forwarding engine to transfer the packets among the stacking interfaces and network port; wherein when one of the stacking links is down, the respective stacking interface toggles a loop flag in each packet received from the forwarding engine, and returns each received packet to the forwarding engine; and wherein the forwarding engine transfers each packet received from one of the stacking interfaces to the respective alternate stacking interface when the loop flag for the packet is set.