Chapter 16: Multicast; Multicast Forwarding - Cisco 300 Series Administration Manual

Multicast

Multicast Forwarding

Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
This section describes the Multicast Forwarding feature, and covers the following
topics:
• Multicast Forwarding
• Defining Multicast Properties
• Adding MAC Group Address
• Adding IP Multicast Group Addresses
• Configuring IGMP Snooping
• MLD Snooping
• Querying IGMP/MLD IP Multicast Group
• Defining Multicast Router Ports
• Defining Forward All Multicast
• Defining Unregistered Multicast Settings
Multicast forwarding enables one-to-many information dissemination. Multicast
applications are useful for dissemination of information to multiple clients, where
clients do not require reception of the entire content. A typical application is a
cable-TV-like service, where clients can join a channel in the middle of a
transmission, and leave before it ends.
The data is sent only to relevant ports. Forwarding the data only to the relevant
ports conserves bandwidth and host resources on links.
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