Chapter 1 Multicast Overview; Multicast Overview; Information Transmission In The Unicast Mode - H3C S3100-52P Operation Manual

Operation Manual – Multicast
H3C S3100-52P Ethernet Switch

Chapter 1 Multicast Overview

Note:
In this manual, the term "router" refers to a router in the generic sense and a Layer 3
Ethernet switch running an IP multicast protocol.
IGMPv3 Snooping features. Refer to
and Configuring a Port as a Simulated Group Member
Suppressing Flooding of Unknown Multicast Traffic in a VLAN
Configuring Static Member Port for a Multicast Group
Configuring a Static Router Port
Configuring a VLAN Tag for Query Messages

1.1 Multicast Overview

With the development of the Internet, more and more interaction services such as data,
voice, and video services are running on the networks. In addition, highly bandwidth-
and time-critical services, such as e-commerce, Web conference, online auction, video
on demand (VoD), and tele-education have come into being. These services have
higher requirements for information security, legal use of paid services, and network
bandwidth.
In the network, packets are sent in three modes: unicast, broadcast and multicast. The
following sections describe and compare data interaction processes in unicast,
broadcast, and multicast.

1.1.1 Information Transmission in the Unicast Mode

In unicast, the system establishes a separate data transmission channel for each user
requiring this information, and sends a separate copy of the information to the user, as
shown in Figure 1-1:
Configuring the Version of IGMP Snooping
1-1
Chapter 1 Multicast Overview