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Summit 200 Series Switch Installation and User Guide 229

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.

Extreme Networks 200 Series User Manual

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