Shulou(Shulou.com)06/03 Report--

Today, I would like to talk to you about the protocol used to implement group management and multicast applications in the network. Many people may not know much about it. In order to make you understand better, the editor summarized the following. I hope you can get something from this article.

IGMP protocol is used to implement group management and multicast applications in the network. The working process of IGMP is as follows: 1. When the host joins a new working group, it sends an igmp host membership report message to all host groups; 2. The local multicast router polls the hosts on the local network periodically.

IGMP Protocol is used to realize Group Management and Multicast Application in Network

IGMP protocol

IGMP works as follows:

one。 When the host joins a new workgroup, it sends an igmp host membership report message to all host groups, announcing the membership. After receiving this message, the local multicast router propagates the relationship information to other multicast routers on the Internet and establishes the necessary routes. At the same time, the ip host group address is mapped to the mac address on the host network interface, and the address filter is reset.

two。 In order to deal with the dynamic membership, the local multicast router periodically polls the hosts on the local network in order to determine which hosts are in each host group. This polling process is realized by sending an igmp host membership query message to all host groups, and the ttl field of the message is set to 1 to ensure that the message will not be sent outside the lan. The host crew member who receives the message will send a response message. If all the host crew members respond at the same time, it may cause network congestion. IGMP uses a random delay method to avoid this situation. This ensures that only one member of each host group is sending a response message at the same time.

After reading the above, do you have any further understanding of the protocols used to implement group management and multicast applications in the network? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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