Ip Multicast Routing Overview; Summit 200 Series Switch Installation And User Guide - Extreme Networks 200 Series Installation And User Manual

17
IP Multicast Routing and
IGMP Snooping
This chapter describes the following topics:
• IP Multicast Routing Overview on page 229
• PIM Sparse Mode (PIM-SM) Overview on page 230
• Configuring PIM-SM on page 230
• IGMP Overview on page 233
• Configuring IGMP and IGMP Snooping on page 234
• Displaying IGMP Snooping Configuration Information on page 235
• Clearing, Disabling, and Resetting IGMP Functions on page 235
For more information on IP multicast groups and IGMP snooping, see the following publications:
• RFC 1112-Host Extension for IP Multicasting
• RFC 2236-Internet Group Management Protocol, Version 2

IP Multicast Routing Overview

IP multicast routing is a function that allows a single IP host to send a packet to a group of IP hosts.
This group of hosts can include devices that reside on the local network, within a private network, or
outside of the local network.
IP multicast routing consists of the following functions:
• A router that can forward IP multicast packets.
• A router-to-router multicast routing protocol (such as Protocol Independent Multicast- Sparse Mode
(PIM-SM).
• A method for the IP host to communicate its multicast group membership to a router (for example,
Internet Group Management Protocol (IGMP)).
NOTE
You should configure IP unicast routing before you configure IP multicast routing.
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