ADTRAN Stub Routing Configuration Manual
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ADTRAN Stub Routing Configuration Manual

ADTRAN Stub Routing Configuration Manual

Ip multicast stub routing in aos
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Configuration Guide

IP Multicast Stub Routing in AOS
Overview and Examples for IP Multicast Technology
IP multicast provides an efficient method for delivering common
information from a single source to multiple recipients without unnecessary
duplication and network resource waste. It is most often associated with the
delivery of media content such as video and audio, but may also be used to
deliver data such as news, stock tickers, and other one-to-many messages.
This document provides a high-level description of IP multicast and
describes the multicast features introduced in the ADTRAN Operating
System (AOS) Release 7.1. For more detailed information regarding
specific command syntax, refer to the AOS Command Reference Guide on
your ADTRAN OS Documentation CD.
This guide consists of the following sections:
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Glossary on page 16
61200890L1-29.3A
March 2005

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Summary of Contents for ADTRAN Stub Routing

  • Page 1: Table Of Contents

    IP Multicast Addressing and Protocols on page 6 • IP Multicast in Stub Topologies on page 8 • IP Multicast Stub Routing in the AOS on page 10 • Example Configuration on page 13 • Key Differences in Multicast Stub Routing on page 14 •...

  • Page 2: Ip Multicast Overview

    Media Server to the Media Server University Backbone Copyright © 2005 ADTRAN, Inc. IP Multicast Stub Routing in AOS must send a separate copy of the is a potential Satellite are on the same 61200890L1-29.3A...
  • Page 3 IP Multicast Stub Routing in AOS IP Multicast Overview niversity Backbone Figure 1. Non-Multicast Network PCs 1, 2, 4, and 6 have subscribed to a specific media server content which is delivered with a separate unicast stream for each subscribing client PC.
  • Page 4 , and have subscribed to the same classroom that they have receivers for that multicast group. Each are on the same broadcast domain. Copyright © 2005 ADTRAN, Inc. IP Multicast Stub Routing in AOS Satellite Router 1 makes a single 61200890L1-29.3A...
  • Page 5 IP Multicast Stub Routing in AOS Figure 2. Multicast-Enabled Network PCs 1, 2, 4, and 6 have subscribed to a specific media server content which is delivered on a single multicast stream and copied once to each segment containing subscribing client PCs.

  • Page 6: Ip Multicast Addressing And Protocols

    IGMP is typically used by an end device to signal a directly-connected router that it wishes to join a specific multicast group, a multicast routing protocol allows a router to pass this information on to other IP Multicast Stub Routing in AOS Copyright © 2005 ADTRAN, Inc.
  • Page 7 IP Multicast Stub Routing in AOS routers (ultimately reaching the router connected to the source of the multicast stream). This allows a distribution tree to be built from the source to all receivers, thus ensuring the following: • There is a path to all receivers.

  • Page 8: Ip Multicast In Stub Topologies

    Satellite Router 1 to the group address 224.1.1.1 then flow through the backbone and specifies a technique for performing just such a proxy Copyright © 2005 ADTRAN, Inc. IP Multicast Stub Routing in AOS and selects a 61200890L1-29.3A...
  • Page 9 IP Multicast Stub Routing in AOS to the multicast-enabled network (the backbone in Figure 2). The connection to the backbone is the stub router’s upstream connection. The connection to the classroom LAN is the stub router’s downstream connection. • A downstream connection faces multicast clients (PCs in Figure 2) and performs the IGMP router function as would a typical multicast router.

  • Page 10: Ip Multicast Stub Routing In The Aos

    IP Multicast Stub Routing in the AOS IP Multicast Stub Routing in the AOS In Release 7.1, AOS introduced IP multicast support in the form of IP Multicast Stub Routing using IGMP Forwarding. Note the following key points for this release: •...

  • Page 11: Feature Operation

    Should become a multicast source, stream toward , but not toward the multicast network. 61200890L1-29.3A IP Multicast Stub Routing in the AOS , an address common to the primary and Multicast Source eth 0/1 ip mcast-stub helper-enable (acting as an IGMP host) sends an IGMP message ppp 1 is unregistered as a group member.
  • Page 12 IP Multicast Stub Routing in the AOS IP Multicast Stub Routing in AOS Figure 3. AOS Multicast Stub and IGMP Forwarding Support Copyright © 2005 ADTRAN, Inc. 61200890L1-29.3A...

  • Page 13: Example Configuration

    IP Multicast Stub Routing in AOS Example Configuration In the following example, Router 1 system common to other vendors, and the on page 12, the receives a default route from the peer router through whichever interface is Stub Router currently connected (primary or secondary).

  • Page 14: Key Differences In Multicast Stub Routing

    Key Differences in Multicast Stub Routing Key Differences in Multicast Stub Routing The key differences between AOS multicast stub routing and that of some other common product operating systems are as follows: • In AOS, the multicast helper address is a single global setting. Each downstream interface can be configured to use or not use IGMP forwarding.

  • Page 15: Frequently Asked Questions (Faqs)

    IP Multicast Stub Routing in AOS Frequently Asked Questions (FAQs) Frequently Asked Questions (FAQs) Q1: What multicast applications does AOS support? A1: AOS 7.x (and later) supports local IP multicast (source and receivers attached to local router interfaces) and IP multicast in stub networks using IGMP forwarding.

  • Page 16: Glossary

    Content: The information being conveyed by a source via transmission of a multicast stream. Downstream: With regard to IP multicast stub routing (IGMP forwarding), the router interface that connects to multicast client devices. DVMRP: Distance Vector Multicast Routing Protocol. A multicast routing protocol similar in operation to RIP.
  • Page 17 Stub Network: A network portion that has a single connection to the remainder of the network. Subscriber: See Listener. Unicast: A transmission sent to a specific receiver. Upstream: With regard to IP multicast stub routing (IGMP forwarding), the router interface that connects to the multicast-enabled network. 61200890L1-29.3A...
  • Page 18 Glossary IP Multicast Stub Routing in AOS Copyright © 2005 ADTRAN, Inc. 61200890L1-29.3A...

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