Extreme Networks ExtremeWare XOS 11.1, Manual

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ExtremeWare XOS 11.1 Concepts Guide
409
22 IP Multicast Routing
This chapter covers the following topics:
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Overview on page 409
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Configuring IP Multicasting Routing on page 412
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Configuration Examples on page 413
For more information on IP multicasting, refer to the following publications:
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RFC 1112— Host Extension for IP Multicasting
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RFC 2236— Internet Group Management Protocol, Version 2
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PIM-DM Version 2— draft_ietf_pim_v2_dm_03
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RFC 2362— Protocol-Independent Multicast - Sparse Mode (PIM-SM): Protoco l Specification
The following URL points to the website for the 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 and within or across
a routing domain.
IP multicast routing consists of the following functions:
●
A router that can forward IP multicast packets
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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))
NOTE
You should configure IP unicast routing before you configure IP multicast routing.
PIM Overview
The switch supports both dense mode and sparse mode operation. You can configure dense mode or
sparse mode on a per-interface basis. After they are enabled, some interfaces can run dense mode, while
others run sparse mode.