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:
Jan. 23, 2018
Filed:
Oct. 07, 2014
Applicant:
Hitachi Metals, Ltd., Minato-ku, Tokyo, JP;
Inventor:
Hitoshi Kuwata, Tsuchiura, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/28 (2006.01); H04L 12/759 (2013.01); H04L 12/761 (2013.01); H04L 12/18 (2006.01); H04L 29/12 (2006.01); H04L 12/741 (2013.01);
U.S. Cl.
CPC ...
H04L 45/028 (2013.01); H04L 12/1836 (2013.01); H04L 45/16 (2013.01); H04L 45/74 (2013.01); H04L 61/103 (2013.01);
Abstract
When IGMP packets are relayed to a predetermined router (L3SW), first and second L2SWs update their own snooping tables by snooping. Also, the first L2SW acquires a correspondence relation retained in the snooping table of the second L2SW through a control plane and registers it to the snooping table of the first L2SW. Then, when the first L2SW receives a multicast packet whose destination is a multicast group, the first L2SW extracts corresponding IP addresses based on its own snooping table and converts the multicast packet into unicast packets whose destinations are the IP addresses.