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. 10, 2012
Filed:
Jul. 02, 2009
Applicants:
Liyang Wang, Shenzhen, CN;
Jun Liu, Shenzhen, CN;
Fenghua Zhao, Shenzhen, CN;
Inventors:
Assignee:
Huawei Technologies Co., Ltd., Shenzhen, CN;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/26 (2006.01); H04L 12/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of multicast traffic redundancy protection includes detecting an original active router; switching a Virtual Route Redundancy Protocol (VRRP) state, by a Virtual Route Redundancy Protocol (VRRP) state switching module if the original active router is faulty; selecting a new active router, notifying, by the VRRP state switching module, a Protocol Independent Multicast (PIM) routing protocol module of the new active router after the VRRP state switching; and, selecting, by the PIM module, the new active router in the VRRP as a Designated Router (DR) in the PIM.