User guide

ExtremeWare 7.2e Installation and User Guide 245
14 IP Multicast Routing
This chapter covers the following topics:
• IP Multicast Routing Overview on page 245
• PIM Sparse Mode (PIM-SM) Overview on page 246
• IGMP Overview on page247
• Multicast Tools on page 249
• Configuring IP Multicasting Routing on page 250
• Configuration for IR1 on page 250
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-SM Version 2 – draft_ietf_pim_sm_v2_new_04
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
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)).