Specifications

ExtremeWare XOS 10.1 Concepts Guide 215

15 IP Multicast Routing

This chapter covers the following topics:

• Overview on page 215

— PIM Overview on page 216

— IGMP Overview on page 217

— on page 218

• Configuring IP Multicasting Routing on page 218

• Configuration Examples on page 219

For more information on IP multicasting, refer to the following publications:

• RFC 1112 – Host Extension for IP Multicasting

• RFC 2236 – Internet Group Management Protocol, Version 2

• PIM-DM Version 2 – draft_ietf_pim_v2_dm_03

• PIM-SM Version 2 – rfc 2362

The following URLs point to the Web sites for the IETF Working Groups:

IEFT PIM Working Group:

http://www.ietf.org/html.charters/pim-charter.html

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 or outside the local network, or within or across a

routing domain.

IP multicast routing consists of the following functions:

• A router that can forward IP multicast packets.

• A router-to-router multicast routing protocol (for example, Protocol Independent Multicast (PIM)).