The client sends an IGMP join message to its designated multicast router.
客户端会传送IGMP加入群组讯息到指定的群播路由器。
In this paper, the multicast protocol (IGMP Snooping) on Ethernet switch is discussed.
本文主要探讨在以太网交换机上的一种组播协议：组播侦听协议。
Besides, Multicat has a group management protocol IGMP, which is the precondition of multicast.
此外，组播路由还需要一个组管理协议IGMP，这个协议是组播路由的前提。
Moreover, due to lack of encryption measures, IGMP messages cannot ensure their confidentiality in the communication process.
此外，IGMP报文在传输时没有加密措施，无法保证其安全性。
By configuring the multicast CAC policies, it can control the quantity and bandwidth of different IGMP snooping multicast groups at interface level and global level.
通过配置组播CAC的政策，它可以控制不同IGMP Snooping组播组的数量和带宽在接口层面和全球层面。
The main module of OLT equipments includes power supply module, OBC module, IWF module, EPON module and so on. Service models mainly include HSI service and IGMP service.
OLT设备的主要模块包括电源模块、管理模块和交换模块等，业务模型主要包括高速上网业务和组播业务。
The main module of OLT equipments includes power supply module, OBC module, IWF module, EPON module and so on. Service models mainly include HSI service and IGMP service.
OLT设备的主要模块包括电源模块、管理模块和交换模块等，业务模型主要包括高速上网业务和组播业务。
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