Patent ID: 8295300
Filing Date: 2012-10-23
Classification: H04L

Abstract:
1. A packet switch operating method comprising: the packet switch receiving a first packet comprising a first multicast destination address from a first device connected to a first port of the packet switch and forwarding the first packet to a second device connected to a second port of the packet switch; after the receiving of the first packet, the packet switch receiving a second packet comprising a query message with a second multicast destination address from the second device, the first device having previously requested to receive packets comprising the second multicast destination address; the packet switch analyzing a source of the second packet, comparing the source of the second packet to a source of an associated multicast service, and determining if the query message is authorized based thereon; and the packet switch discarding the second packet if the query message is unauthorized based upon receiving the second packet on the second port with the second multicast destination address if the query message originates from a source that is not the source of the associated multicast service.