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:
Jun. 24, 2014
Filed:
Sep. 28, 2011
Zhaohui Zhang, Westford, MA (US);
Weesan Lee, Arcadia, CA (US);
Zhaohui Zhang, Westford, MA (US);
WeeSan Lee, Arcadia, CA (US);
Juniper Networks, Inc., Sunnyvale, CA (US);
Abstract
Techniques are described for reducing unnecessary upstream traffic toward a rendezvous point (RP) of a network using Protocol Independent Multicast Bidirectional Mode. The techniques include determining whether the RP needs to receive multicast traffic for a multicast group and, when the RP does not need to receive the multicast traffic, sending RP-prune control messages for the multicast group to downstream routers. Upon receiving an RP-prune control message, a downstream router may prune an outgoing interface for the multicast group to prevent the downstream router from forwarding multicast traffic for the multicast group toward the RP. The downstream router may terminate the RP-prune control message or propagate the RP-prune control message to a further downstream router. Routers that send RP-prune control messages also create or update a RP-prune state for the multicast group that includes interfaces for the downstream routers to which the RP-prune control messages were sent.