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    • 4. 发明授权
    • Policy handling for multicast transmissions
    • 组播传输的策略处理
    • US08510551B1
    • 2013-08-13
    • US12267938
    • 2008-11-10
    • Purvi DesaiKannan Varadhan
    • Purvi DesaiKannan Varadhan
    • H04L29/06
    • H04L12/18H04L63/0236
    • A device, receives a unicast packet designating a unicast source and a unicast destination, and determines whether the received unicast packet is a Data Register message. The device extracts information relating to a multicast packet encapsulated within the unicast packet when the unicast packet is a Data Register message, and performs a security policy lookup based on the extracted multicast packet information to identify a security policy associated with the multicast packet. The device determines whether the identified security policy authorizes forwarding of the unicast packet, and establishes a multicast data session when the identified security policy authorizes forwarding of the unicast packet. The device establishes a multicast control session based on the multicast data session, where the multicast control session authorizes transmission of PIM-related control messages associated with the multicast packet. The device forwards the unicast packet to the unicast destination based on the multicast data session.
    • 一种设备,接收指定单播源和单播目的地的单播分组,并且确定所接收的单播分组是否是数据注册消息。 当单播分组是数据注册消息时,该装置提取与单播分组中封装的多播分组有关的信息,并且基于所提取的多播分组信息执行安全策略查找,以识别与多播分组相关联的安全策略。 该设备确定所识别的安全策略是否授权转发单播报文,并在所识别的安全策略授权转发单播报文时,建立组播数据会话。 该设备基于组播数据会话建立组播控制会话,组播控制会话授权与组播数据包相关的PIM相关控制消息的传输。 该设备基于组播数据会话将单播报文转发到单播目的地。