Extreme Networks ExtremeWare XOS 10.1, Manual

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ExtremeWare XOS 10.1 Concepts Guide 217
15
IP Multicast Routing
This chapter covers the following topics:
• Overview on page 217
— PIM Overview on page 218
— PIM Overview on page 218
—
IGMP Overview on page 219
• Configuring IP Multicasting Routing on page 220
• Configuration Examples on page 221
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
• RFC 2362 – PIM-SM Version 2
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))
• A method for the IP host to communicate its multicast group membership to a router (for example,
Internet Group Management Protocol (IGMP))