configuring ip multicast routing protocols

Part No. 217459-AJune 2005

4655 Great America ParkwaySanta Clara, CA 95054

*217459-A*

Configuring IP Multicast Routing ProtocolsNortel Ethernet Switches 460 and 470 Software Release 3.6

2

217459-A

Copyright © Nortel Networks Limited 2005. All rights reserved.

The information in this document is subject to change without notice. The statements, configurations, technical data, and recommendations in this document are believed to be accurate and reliable, but are presented without express or implied warranty. Users must take full responsibility for their applications of any products specified in this document. The information in this document is proprietary to Nortel Networks NA Inc.

The software described in this document is furnished under a license agreement and may be used only in accordance with the terms of that license. The software license agreement is included in this document.

Trademarks

Autotopology, BayStack, BaySecure, Business Policy Switch 2000, Nortel Networks, the Nortel Networks logo, Optivity, Optivity Policy Services, Preside, and Quick2Config are trademarks of Nortel Networks.

Microsoft, MS, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation.

Java is a trademark of Sun Microsystems, Inc.

Acrobat and Adobe are trademarks of Adobe Systems, Inc.

All other trademarks and registered trademarks are the property of their respective owners.

Restricted rights legend

Use, duplication, or disclosure by the United States Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013.

Notwithstanding any other license agreement that may pertain to, or accompany the delivery of, this computer software, the rights of the United States Government regarding its use, reproduction, and disclosure are as set forth in the Commercial Computer Software-Restricted Rights clause at FAR 52.227-19.

Statement of conditions

In the interest of improving internal design, operational function, and/or reliability, Nortel Networks Inc. reserves the right to make changes to the products described in this document without notice.

Nortel Networks Inc. does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.

Portions of the code in this software product may be Copyright © 1988, Regents of the University of California. All rights reserved. Redistribution and use in source and binary forms of such portions are permitted, provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation, advertising materials, and other materials related to such distribution and use acknowledge that such portions of the software were developed by the University of California, Berkeley. The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission.

SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

In addition, the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure (that may incorporate by reference certain limitations and notices imposed by third parties).

3

Configuring IP Multicast Routing Protocols

International regulatory statements of conformity

This is to certify that the Nortel Ethernet Switches 460 and 470 were evaluated to the international regulatory standards for electromagnetic compliance (EMC) and safety and were found to have met the requirements for the following international standards:

• EMC - Electromagnetic Emissions – CISPR 22, Class A• EMC - Electromagnetic Immunity – CISPR 24• Electrical Safety – IEC 60950, with CB member national deviations

Further, the equipment has been certified as compliant with the national standards as detailed below.

National electromagnetic compliance (EMC) statements of compliance

FCC statement (USA only)

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the Federal Communications Commission (FCC) rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the instruction manual, it may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to take whatever measures may be necessary to correct the interference at their own expense.

ICES statement (Canada only)

Canadian Department of Communications Radio Interference Regulations

This digital apparatus (Nortel Ethernet Switches 460 and 470) do not exceed the Class A limits for radio-noise emissions from digital apparatus as set out in the Radio Interference Regulations of the Canadian Department of Communications.

Règlement sur le brouillage radioélectrique du ministère des Communications

Cet appareil numérique (Nortel Ethernet Switches 460 and 470) respecte les limites de bruits radioélectriques visant les appareils numériques de classe A prescrites dans le Règlement sur le brouillage radioélectrique du ministère des Communications du Canada.

CE marking statement (Europe only)

EN 55 022 statements

This is to certify that the Nortel Ethernet Switches 460 and 470 are shielded against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC. Conformity is declared by the application of EN 55 022 Class A (CISPR 22).

Caution: This device is a Class A product. In a domestic environment, this device can cause radio interference, in which case the user may be required to take appropriate measures.

4

217459-A

EN 55 024 statement

This is to certify that the Nortel Ethernet Switches 460 and 470 are shielded against the susceptibility to radio interference in accordance with the application of Council Directive 89/336/EEC. Conformity is declared by the application of EN 55 024 (CISPR 24).

CE Declaration of Conformity

This product conforms to the provisions of the R&TTE Directive 1999/5/EC.

VCCI statement (Japan/Nippon only)

This is a Class A product based on the standard of the Voluntary Control Council for Interference (VCCI) for information technology equipment. If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.

BSMI statement for Ethernet Switches 460 and 470 (Taiwan only)

This is a Class A product based on the standard of the Bureau of Standards, Metrology and Inspection (BSMI) CNS 13438, Class A.

MIC notice for Ethernet Switches 460 and 470 (Republic of Korea only)

This device has been approved for use in Business applications only per the Class A requirements of the Republic of Korea Ministry of Information and Communications (MIC). This device may not be sold for use in a non-business application.

Observe the Regulatory Marking label on the bottom surface of the chassis for specific certification information pertaining to this model. Each model in the Ethernet Switch Series which is approved for shipment to/usage in Korea is labeled as such, with all appropriate text and the appropriate MIC reference number.

5


National safety statements of compliance

CE marking statement (Europe only)

EN 60 950 statement

This is to certify that the Nortel Ethernet Switches 460 and 470 are in compliance with the requirements of EN 60 950 in accordance with the Low Voltage Directive. Additional national differences for all European Union countries have been evaluated for compliance.

NOM statement Ethernet Switches 460 and 470 (Mexico only)

The following information is provided on the devices described in this document in compliance with the safety requirements of the Norma Oficial Méxicana (NOM):

Exporter: Nortel Networks, Inc.4655 Great America ParkwaySanta Clara CA 95054 USA

Importer: Nortel Networks de México, S.A. de C.V.Avenida Insurgentes Sur #1605Piso 30, OficinaCol. San Jose InsurgentesDeleg-Benito JuarezMéxico D.F. 03900

Tel: 52 5 480 2100

Fax: 52 5 480 2199

Input: Ethernet Switch 460, Ethernet Switch 470

100 - 120 VAC 16A 50 to 60 Hz

200 - 240 VAC 12 A 50 to 60 Hz

Información NOM (unicamente para México)

La información siguiente se proporciona en el dispositivo o en los dispositivos descritos en este documento, en cumplimiento con los requisitos de la Norma Oficial Méxicana (NOM):

Exportador: Nortel Networks, Inc.4655 Great America ParkwaySanta Clara, CA 95054 USA

Importador: Nortel Networks de México, S.A. de C.V.Avenida Insurgentes Sur #1605Piso 30, OficinaCol. San Jose InsurgentesDeleg-Benito JuarezMéxico D.F. 03900

Tel: 52 5 480 2100

Fax: 52 5 480 2199

Embarcar a: Ethernet Switch 460, Ethernet Switch 470

100 - 120 VAC 16A 50 to 60 Hz

200 - 240 VAC 12 A 50 to 60 Hz

6

217459-A

Nortel Networks Inc. software license agreement

This Software License Agreement (“License Agreement”) is between you, the end-user (“Customer”) and Nortel Networks Corporation and its subsidiaries and affiliates (“Nortel Networks”). PLEASE READ THE FOLLOWING CAREFULLY. YOU MUST ACCEPT THESE LICENSE TERMS IN ORDER TO DOWNLOAD AND/OR USE THE SOFTWARE. USE OF THE SOFTWARE CONSTITUTES YOUR ACCEPTANCE OF THIS LICENSE AGREEMENT. If you do not accept these terms and conditions, return the Software, unused and in the original shipping container, within 30 days of purchase to obtain a credit for the full purchase price.

“Software” is owned or licensed by Nortel Networks, its parent or one of its subsidiaries or affiliates, and is copyrighted and licensed, not sold. Software consists of machine-readable instructions, its components, data, audio-visual content (such as images, text, recordings or pictures) and related licensed materials including all whole or partial copies. Nortel Networks grants you a license to use the Software only in the country where you acquired the Software. You obtain no rights other than those granted to you under this License Agreement. You are responsible for the selection of the Software and for the installation of, use of, and results obtained from the Software.

1. Licensed Use of Software. Nortel Networks grants Customer a nonexclusive license to use a copy of the Software on only one machine at any one time or to the extent of the activation or authorized usage level, whichever is applicable. To the extent Software is furnished for use with designated hardware or Customer furnished equipment (“CFE”), Customer is granted a nonexclusive license to use Software only on such hardware or CFE, as applicable. Software contains trade secrets and Customer agrees to treat Software as confidential information using the same care and discretion Customer uses with its own similar information that it does not wish to disclose, publish or disseminate. Customer will ensure that anyone who uses the Software does so only in compliance with the terms of this Agreement. Customer shall not a) use, copy, modify, transfer or distribute the Software except as expressly authorized; b) reverse assemble, reverse compile, reverse engineer or otherwise translate the Software; c) create derivative works or modifications unless expressly authorized; or d) sublicense, rent or lease the Software. Licensors of intellectual property to Nortel Networks are beneficiaries of this provision. Upon termination or breach of the license by Customer or in the event designated hardware or CFE is no longer in use, Customer will promptly return the Software to Nortel Networks or certify its destruction. Nortel Networks may audit by remote polling or other reasonable means to determine Customer’s Software activation or usage levels. If suppliers of third party software included in Software require Nortel Networks to include additional or different terms, Customer agrees to abide by such terms provided by Nortel Networks with respect to such third party software.

2. Warranty. Except as may be otherwise expressly agreed to in writing between Nortel Networks and Customer, Software is provided “AS IS” without any warranties (conditions) of any kind. NORTEL NETWORKS DISCLAIMS ALL WARRANTIES (CONDITIONS) FOR THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABLITITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY WARRANTY OF NON-INFRINGEMENT. Nortel Networks is not obligated to provide support of any kind for the Software. Some jurisdictions do not allow exclusion of implied warranties, and, in such event, the above exclusions may not apply.

3. Limitation of Remedies. IN NO EVENT SHALL NORTEL NETWORKS OR ITS AGENTS OR SUPPLIERS BE LIABLE FOR ANY OF THE FOLLOWING: a) DAMAGES BASED ON ANY THIRD PARTY CLAIM; b) LOSS OF, OR DAMAGE TO, CUSTOMER’S RECORDS, FILES OR DATA; OR c) DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS OR SAVINGS), WHETHER IN CONTRACT, TORT OR OTHERWISE (INCLUDING NEGLIGENCE) ARISING OUT OF YOUR USE OF THE SOFTWARE, EVEN IF NORTEL NETWORKS, ITS AGENTS OR SUPPLIERS HAVE BEEN ADVISED OF THEIR POSSIBILITY. The forgoing limitations of remedies also apply to any developer and/or supplier of the Software. Such developer and/or supplier is an intended beneficiary of this Section. Some jurisdictions do not allow these limitations or exclusions and, in such event, they may not apply.

4. General

a. If Customer is the United States Government, the following paragraph shall apply: All Nortel Networks Software available under this License Agreement is commercial computer software and commercial computer software documentation and, in the event Software is licensed for or on behalf of the United States Government,

7


the respective rights to the software and software documentation are governed by Nortel Networks standard commercial license in accordance with U.S. Federal Regulations at 48 C.F.R. Sections 12.212 (for non-Odd entities) and 48 C.F.R. 227.7202 (for Odd entities).

b. Customer may terminate the license at any time. Nortel Networks may terminate the license if Customer fails to comply with the terms and conditions of this license. In either event, upon termination, Customer must either return the Software to Nortel Networks or certify its destruction.

c. Customer is responsible for payment of any taxes, including personal property taxes, resulting from Customer’s use of the Software. Customer agrees to comply with all applicable laws including all applicable export and import laws and regulations.

d. Neither party may bring an action, regardless of form, more than two years after the cause of the action arose.

e. The terms and conditions of this License Agreement form the complete and exclusive agreement between Customer and Nortel Networks.

f. This License Agreement is governed by the laws of the country in which Customer acquires the Software. If the Software is acquired in the United States, then this License Agreement is governed by the laws of the state of New York.

8

217459-A

Revision History

Date Revised Version Reason for revision

June 2005 1.0 Created new document structure and incorporated new features for Ethernet Switch Release 3.6 software.

9


Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Network management tools and interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Before you begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Text conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Obtaining technical assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 1IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

IGMP Snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Configuration example: IGMP snooping disabled . . . . . . . . . . . . . . . . . . . . . . . . . 22

Configuration example: IGMP snooping/proxy enabled . . . . . . . . . . . . . . . . . . . . . 24

IGMP snooping enabled/proxy disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

IGMP snooping configuration rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

IGMP Configuration Menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

IGMP Configuration screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Multicast Group Membership screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Chapter 2Configuring IGMP using the CLI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

show vlan igmp command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

vlan igmp command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

vlan igmp unknown-mcast-no-flood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

default vlan igmp command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

show vlan multicast membership command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10 Contents

217459-A

Chapter 3Configuring IGMP using Device Manager . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Snoop tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Chapter 4Configuring IGMP using Web-based management. . . . . . . . . . . . . . . . . . . 43

Configuring IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Viewing Multicast group membership configurations . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Appendix AQuick steps to IGMP snooping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Configuring IGMP Snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

11


Figures

Figure 1 IP Multicast propagation with IGMP routing . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 2 Ethernet Switch 460/470 filtering IP multicast streams . . . . . . . . . . . . . . 25

Figure 3 Ethernet Switch 460/470 filtering IP multicast streams . . . . . . . . . . . . . . 26

Figure 4 IGMP Configuration Menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 5 IGMP Configuration screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 6 Multicast Group Membership screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 7 show vlan igmp command output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 8 show vlan multicast membership command output . . . . . . . . . . . . . . . . . 39

Figure 9 Snoop tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 10 IGMP Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 11 IGMP: VLAN Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 12 IGMP Multicast Group Membership page . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 13 Configuring IGMP Snooping (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50



12 Figures

217459-A

13


Tables

Table 1 IGMP Configuration Menu screen options . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 2 IGMP Configuration screen fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 3 Multicast Group Membership screen options . . . . . . . . . . . . . . . . . . . . . . 33

Table 4 show vlan igmp command parameters and variables . . . . . . . . . . . . . 35

Table 5 vlan igmp command parameters and variables . . . . . . . . . . . . . . . . . . 36

Table 6 vlan igmp unknown-mcast-no-flood command parameters and variables 37

Table 7 default vlan igmp command parameters and variables . . . . . . . . . . 38

Table 8 show vlan multicast membership command parameters and variables 38

Table 9 Snoop tab fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 10 IGMP Configuration page fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 11 IGMP: VLAN Configuration page fields . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 12 IGMP Multicast Group Membership page fields . . . . . . . . . . . . . . . . . . . . 47

14 Tables

217459-A

15


Preface

About this guide

This guide provides information about configuring and managing IP Multicast Routing Protocol features on the Nortel Ethernet Switch 460 and Nortel Ethernet Switch 470.

Network management tools and interfaces

The following are the management tools and interfaces available with the switch (for basic instructions on these tools, refer to the System Configuration Guide (217105-A)):

• Console interface

The console interface (CI) allows you to configure and manage the switch locally or remotely. Access the CI menu and screens locally through a console terminal attached to your Ethernet Switch, remotely through a dial-up modem connection, or in-band through a Telnet session.

• Web-based management

You can manage the network from the World Wide Web and can access the Web-based Graphical User Interface (GUI) through the HTML-based browser located on your network. The GUI allows you to configure, monitor, and maintain your network through Web browsers. You can also download software using the Web.

• Java-based Device Manager

The Device Manager is a set of Java-based graphical network management applications that is used to configure and manage Ethernet Switches 460 and 470.

16 Preface

217459-A

• Command Line Interface (CLI)

The CLI is used to automate general management and configuration of the Ethernet Switches 460 and 470. Use the CLI through a Telnet connection or through the serial port on the console.

• Any generic SNMP-based network management software

You can use any generic SNMP-based network management software to configure and manage Ethernet Switches 460 and 470.

• Telnet

Telnet allows you to access the CLI and CI menu and screens locally using an in-band Telnet session.

• SSH

Secure Shell (SSH) is a client/server protocol that can provide a secure remote login with encryption of data, username, and password. For details on SSH connections, refer to Configuring and managing Security (217104-A).

• Nortel Enterprise Policy Manager

The Nortel Enterprise Policy Manager (formerly Optivity Policy Services) allows you to configure the Ethernet Switches 460 and 470 with a single system.

Before you begin

This guide is intended for network administrators with the following background:

• Basic knowledge of networks, bridging, and IP

• Familiarity with networking concepts and terminology

• Basic knowledge of network topologies

Before using this guide, you must complete the installation procedures discussed in Installing the Nortel Ethernet Switch 460-24T-PWR (213318-C) or Installing the Nortel Ethernet Switch 470 (217108-A).

Preface 17


Text conventions

angle brackets (< >) Indicate that you choose the text to enter based on the description inside the brackets. Do not type the brackets when entering the command.Example: If the command syntax isip default-gateway <XXX.XXX.XXX.XXX>,you enterip default-gateway 192.32.10.12

braces ({}) Indicate required elements in syntax descriptions where there is more than one option. You must choose only one of the options. Do not type the braces when entering the command.Example: If the command syntax ishttp-server {enable|disable}the options are enable or disable.

brackets ([ ]) Indicate optional elements in syntax descriptions. Do not type the brackets when entering the command.Example: If the command syntax isshow ip [bootp], you can enter eithershow ip or show ip bootp.

plain Courier text

Indicates command syntax and system output.Example: TFTP Server IP Address: 192.168.100.15

vertical line | Separates choices for command keywords and arguments. Enter only one of the choices. Do not type the vertical line when entering the command.Example: If the command syntax iscli password <serial|telnet>,you must enter either cli password serial or cli password telnet, but not both.

H.H.H. Enter a MAC address in this format (XXXX.XXXX.XXXX).

18 Preface

217459-A

Related publications

For more information about managing or using the switches, refer to the following publications:

• Release Notes for the Ethernet Switch 460 and 470 Switch Software Version 3.6 (217103)

• Installing the Nortel Ethernet Switch 460-24T-PWR (213318-C)

• Installing the Nortel Ethernet Switch 470 (217108-A)

• System Configuration Guide (217105-A)

• Configuring and managing Security (217104-A)

• System Monitoring Guide (217107-A)

• Configuring Quality of Service, and IP Filtering (217106-A)

• Configuring VLANs, Spanning Tree, and MultiLink Trunking (217460-A)

• Installing Gigabit Interface Converters and Small Form Factor Pluggable Interface Converters (312865-B)

You can print selected technical manuals and release notes free, directly from the Internet. Go to www.nortel.com/support. Find the product for which you need documentation. Then locate the specific category and model or version for your hardware or software product. Use Adobe* Acrobat Reader* to open the manuals and release notes, search for the sections you need, and print them on most standard printers. Go to the Adobe Systems web site to download a free copy of the Adobe Acrobat Reader.

Obtaining technical assistance

If you purchased a service contract for your Nortel product from a distributor or authorized reseller, contact the technical support staff for that distributor or reseller for assistance.

http://www.nortel.com/support

Preface 19


If you purchased a Nortel service program, contact one of the following Nortel Technical Solutions Centers:

Additional information about the Nortel Technical Solutions Centers is available from www.nortel.com/callus.

An Express Routing Code (ERC) is available for many Nortel products and services. When you use an ERC, your call is routed to a technical support person who specializes in supporting that product or service. To locate an ERC for your product or service, go to www.nortel.com/erc.

Technical Solutions Center Telephone

Europe, Middle East, and Africa (33) (4) 92-966-968

North America (800) 4NORTEL or (800) 466-7835

Asia Pacific (61) (2) 9927-8800

China (800) 810-5000

http://www.nortel.com/callus

http://www.nortel.com/callus

http://www.nortel.com/erc

20 Preface

217459-A

21


Chapter 1IGMP

This chapter contains information on the following topics:

• “IGMP Snooping” on page 21

• “IGMP snooping configuration rules” on page 27

• “IGMP Configuration screen” on page 29

• “Multicast Group Membership screen” on page 32

IGMP Snooping

IP Multicast can be optimized in a LAN by using IP Multicast filtering switches, such as the Ethernet Switch 460 or 470.

Ethernet Switches 460 and 470 can sense Internet Group Management Protocol (IGMP) host membership reports from attached stations, and use this information to set up a dedicated path between the requesting station and a local IP Multicast router. After the pathway is established, the Ethernet Switches 460 and 470 block the IP Multicast stream from exiting any other port that does not connect to another host member, thus conserving bandwidth. The following section describes how Ethernet Switches 460 and 470 provide the same benefit as IP Multicast routers, but in the local area.

22 Chapter 1 IGMP

217459-A

Configuration example: IGMP snooping disabled

IGMP is used by IP Multicast routers to learn about the existence of host group members on their directly attached subnets (see RFC 2236). The IP Multicast routers obtain this information by broadcasting IGMP queries and listening for IP hosts reporting their host group memberships. This process is used to set up a client/server relationship between an IP Multicast source that provides the data streams and the clients that want to receive the data.

Figure 1 on page 23 shows how IGMP is used to set up the path between the client and server. As shown in this example, the IGMP host provides an IP Multicast stream to designated routers that forward the IP Multicast stream on their local network, only if there is a recipient.

The client/server path is set up as follows:

1 The designated router sends out a host membership query to the subnet and receives host membership reports from end stations on the subnet.

2 The designated routers then set up a path between the IP Multicast stream source and the end stations.

3 Periodically, the router continues to query end stations on whether to continue participation.

4 As long as any client continues to participate, all clients, including nonparticipating end stations on that subnet, receive the IP Multicast stream.

Note: Although the nonparticipating end stations can filter the IP Multicast traffic, the IP Multicast traffic still exists on the subnet and consumes bandwidth.

Chapter 1 IGMP 23


As shown in Figure 1, a non-IP Multicast filtering switch causes IP Multicast traffic to be sent to all segments on the local subnet.

Figure 1 IP Multicast propagation with IGMP routing

Non-IP Multicastfiltering switch

Non-IP Multicastfiltering switch

Hostmembership

report

Multicast stream

Hostmembership

query

Designatedrouter #2

Designatedrouter #1

IGMPHost

Hostmembership

report

Hostmembership

query

Internet

24 Chapter 1 IGMP

217459-A

Configuration example: IGMP snooping/proxy enabled

The Ethernet Switches 460 and 470 can automatically set up IP Multicast filters so the IP Multicast traffic is directed only to the participating end nodes (see Figure 2 on page 25).

In Figure 2 on page 25, switches S1 to S4 represent a LAN connected to an IP Multicast router. The router periodically sends Host Membership Queries to the LAN and listens for a response from end stations. All the clients connected to switches S1 to S4 are aware of the queries from the router.

One client, connected to S2, responds with a host membership report. Switch S2 intercepts the report from that port, and generates a proxy report to its upstream neighbor, S1. Also, two clients connected to S4 respond with host membership reports, causing S4 to intercept the reports and to generate a consolidated proxy report to its upstream neighbor, S1.

Chapter 1 IGMP 25


Figure 2 Ethernet Switch 460/470 filtering IP multicast streams

Switch S1 treats the consolidated proxy reports from S2 and S4 as if they were reports from any client connected to its ports, and generates a consolidated proxy report to the designated router. In this way, the router receives a single consolidated report from that entire subnet.

After the switches learn which ports are requesting access to the IP Multicast stream, all other ports not responding to the queries are blocked from receiving the IP Multicast (Figure 3 on page 26).

S4

Ethernet Switch

Ethernet Switch

S3S2

Consolidatedreport

Hostmembership

reportHost

membershipreport

Designatedrouter

Hostmembership

query

Internet

Proxy

Proxy

S1 Ethernet Switch470

Ethernet Switch

26 Chapter 1 IGMP

217459-A

Figure 3 Ethernet Switch 460/470 filtering IP multicast streams

The consolidated proxy report generated by the switch remains transparent to layer 3 of the International Organization for Standardization, Open Systems Interconnection (ISO/OSI) model. (The switch IP address and MAC address are not part of proxy report generation.) The last reporting IGMP group member in each VLAN represents all of the hosts in that VLAN and IGMP group.

S4

Ethernet Switch

Ethernet Switch

S3

S1 Ethernet Switch470

Designatedrouter

Hostmembership

query

Internet

Key

Multicast stream

Ethernet Switch

S2

Chapter 1 IGMP 27


IGMP snooping enabled/proxy disabled

In the “Configuration example: IGMP snooping/proxy enabled” on page 24, a consolidated report is provided to the router. However, if the designated router is, for example, a Passport router, it can be advantageous to enable IGMP snooping but disable the IGMP proxy setting. In this case, the router, instead of receiving a consolidated host membership report, receives all report packets transmitted by all multicast users.

The Passport router provides a table displaying all multicast users to which it is connected. Passport can also display the host member IP addresses and the elapsed time since each member’s last received report.

If you enable both IGMP snooping and IGMP proxy, only one of the users connected to the switch can be displayed in the router's table. However, if you enable IGMP snooping, but disable IGMP proxy, all report packets transmitted by the multicast users are transmitted to the router ports. As a result, the router can display all the multicast users on the connected LAN.

One disadvantage of disabling IGMP proxy is an increase in traffic on the router ports (especially in large LANs). You must therefore determine in each case whether the advantages of this configuration justify the increased traffic.

IGMP snooping configuration rules

The IGMP snooping feature operates according to specific configuration rules. When configuring your switch for IGMP snooping, consider the following rules that determine how the configuration reacts in any network topology:

• A port that is configured for port mirroring cannot be configured as a static router port.

• If a Multilink Trunk member is configured as a static router port, all the Multilink trunk members are configured as static router ports. Also, if a static router port is removed, and it is a Multilink Trunk member, all Multilink trunk members are removed as static router port members, automatically.

• Static router ports must be port members of at least one VLAN.

• If a port is configured as a static router port, it is configured as a static router port for all VLANs on that port. The IGMP configuration is propagated through all VLANs of that port.

28 Chapter 1 IGMP

217459-A

• If a static router port is removed, the membership for that port is removed from all VLANs of that port.

• The IGMP snooping feature is not STP-dependent.

• The IGMP snooping feature is not Rate Limiting-dependent.

• The snooping field must be enabled for the proxy field to have any valid meaning.

• Static router ports are configured per VLAN and per IGMP version.

IGMP Configuration Menu screen

The IGMP Configuration Menu screen (Figure 4 on page 29) allows you to select the appropriate screen to optimize IP Multicast packets in a bridged Ethernet environment.

To open the IGMP Configuration Menu screen:

Note: Because IGMP snooping is set up per VLAN, all IGMP changes are implemented according to the VLAN configuration for the specified ports.

Chapter 1 IGMP 29


➨ Choose IGMP Configuration (or press g) from the Switch Configuration Menu screen.

Figure 4 IGMP Configuration Menu screen

Table 1 describes the IGMP Configuration Menu screen options.

IGMP Configuration screen

Figure 5 on page 30 shows an example of the IGMP Configuration screen.

To open the IGMP Configuration screen:

Table 1 IGMP Configuration Menu screen options

Option Description

IGMP Configuration... Displays the IGMP Configuration screen (see “IGMP Configuration screen” on page 29). This screen allows you to set up IGMP VLAN configurations.

Display Multicast Group Membership...

Displays the Multicast Group Membership screen (see “Multicast Group Membership screen” on page 32.) This screen allows you to view all IP Multicast addresses that are active in the current VLAN.

30 Chapter 1 IGMP

217459-A


Figure 5 IGMP Configuration screen

Chapter 1 IGMP 31


Table 2 describes the IGMP Configuration screen fields.

Note: When you update any of the fields in the IGMP Configuration screen, the changes affect only the VLAN specified in the VLAN field (for example, if you change the robust value for the VLAN specified in the VLAN field, other VLANs are not affected).

Table 2 IGMP Configuration screen fields

Field Description

VLAN Allows you to set up or view IGMP VLAN configurations on specified VLANs. You can use the space bar to toggle to any existing IGMP VLAN configurations (the maximum number of VLANs that can be displayed is 256).

Default: 1

Range: 1 to 4094

Snooping Allows you to enable or disable IGMP Snooping.

Default Value: Disabled

Range: Enabled, Disabled

Proxy Allows the switch to consolidate IGMP Host Membership Reports received on its downstream ports and to generate a consolidated proxy report for forwarding to its upstream neighbor.

Default Value: Disabled

Range: Enabled, Disabled

Robust Value Allows you to set the switch to offset expected packet loss on a subnet. If packet losses on a subnet are unacceptably high, the Robust Value field can be increased to a higher value.

Default Value: 2

Range: 1 to 256

Query Time Allows you to control the number of IGMP messages allowed on the subnet by varying the Query Interval (the Query Interval is the interval between general queries sent by the multicast router).

Default Value: 125 seconds

Range: 1 to 512 seconds

32 Chapter 1 IGMP

217459-A

Multicast Group Membership screen

The Multicast Group Membership screen (Figure 6 on page 33) allows you to view configured IP Multicast group addresses for specific VLANs. The screen displays the IP Multicast group addresses associated with ports that are configured within a stand-alone switch. The displayed addresses are dynamic and can change as clients join (or leave) the various IP Multicast groups.

To open the Multicast Group Membership screen:

➨ Choose Display Multicast Group Membership (or press d) from the IGMP Configuration Menu screen.

Set Router Ports Selects the IGMP version according to the IGMPv1 (Version 1) or IGMPv2 (Version 2) standard (see RFC 2236). Use this field in conjunction with the Static Router Ports field (see next field description) to select the IGMP version to set.You can also use this field to view which static router ports are set to Version 1 or to Version 2. Use the space bar to toggle between the two versions and view the static router ports settings.

Default Value: Version 1

Range: Version 1, Version 2

Static Router Ports Allows a user to assign switch ports to any port that has a path to a multicast router.The configured ports do not filter any IP Multicast traffic. The Static Router Ports fields are displayed in six-port groups (for example, 1-6, 7-12, 13-18). The number of ports displayed depends on the switch model.

Table 2 IGMP Configuration screen fields (Continued)

Field Description

Chapter 1 IGMP 33


Figure 6 Multicast Group Membership screen

Table 3 describes the Multicast Group Membership screen options.

Table 3 Multicast Group Membership screen options

Option Description

VLAN Allows you to view multicast group addresses on specified VLANs. You can use the space bar to view group addresses for any existing IGMP VLAN configurations (the maximum number of VLANs that can be displayed is 256).

Multicast Group Address Displays all of the IP Multicast group addresses that are currently active on the associated port.

Port Displays the port numbers that are associated with the IP Multicast group addresses displayed in the IP Multicast group address field.

34 Chapter 1 IGMP

217459-A

35


Chapter 2Configuring IGMP using the CLI

You can configure and display IGMP snooping parameters using the CLI. This chapter covers the following topics:

• “show vlan igmp command ”

• “vlan igmp command” on page 36

• “vlan igmp unknown-mcast-no-flood” on page 37

• “default vlan igmp command” on page 38

• “show vlan multicast membership command” on page 38

show vlan igmp command

The show vlan igmp command displays the IGMP snooping configuration. The syntax for the show vlan igmp command is:

show vlan igmp {<1-4094> |unknown-mcast-no-flood}

The show vlan igmp command is in the privExec mode.

Table 4 describes the parameters and variables for the show vlan igmp command.

Table 4 show vlan igmp command parameters and variables

Parameters and variables

Description

<1-4094> Specifies the VLAN for which to display the IGMP configuration.

unknown-mcast-no-flood

Displays the setting for flooding packets with unknown multicast addresses.

36 Chapter 2 Configuring IGMP using the CLI

217459-A

Figure 7 displays sample output from the show vlan igmp command.

Figure 7 show vlan igmp command output

vlan igmp command

The vlan igmp command configures IGMP snooping parameters. The syntax for the vlan igmp command is:

vlan igmp {<1-4094> [snooping {enable|disable}][proxy {enable|disable}] [robust-value <value>] [query-interval <time>] [v1-members <portlist>] [v2-members <portlist>] | unknown-mcast-no-flood {disable |enable}}

The vlan igmp command is in the config mode.

Table 5 describes the parameters and variables for the vlan igmp command.

Table 5 vlan igmp command parameters and variables


Description

<1-4094> Enter the VLAN to configure for IGMP.

snooping {enable|disable}

Enables or disables the VLAN for IGMP snooping.

proxy {enable|disable}

Enables or disables the VLAN for IGMP proxy.

robust-value <value>

Enter the robust value you want for IGMP.

query-interval <time>

Enter the number of seconds you want for the IGMP query interval.

470_24T#show vlan igmp 1Snooping: EnabledProxy: EnabledRobust Value: 2Query Time: 125 secondsIGMPv1 Static Router Ports:

Chapter 2 Configuring IGMP using the CLI 37


vlan igmp unknown-mcast-no-flood

The vlan igmp unknown-mcast-no-flood command allows the user to block flooding of packets with unknown multicast address. Instead, the unknown multicast traffic is sent only to IGMP static router ports. The syntax for the vlan igmp unknown-mcast-no-flood command is:

vlan igmp unknown-mcast-no-flood

The vlan igmp unknown-mcast-no-flood command is in the config command mode.

Table 6 describes the parameters and variables for the vlan igmp unknown-mcast-no-flood command.

v1-members <portlist>

Enter the list of ports for port membership for IGMP v1.

v2-members <portlist>

Enter the list of ports for port membership for IGMP v2.


Enables or disables the flooding packets with unknown multicast addresses.

Table 6 vlan igmp unknown-mcast-no-flood command parameters and variables

Parameters and variables Description

enable Enables flooding of packets with unknown multicast addresses.

Note: The default parameter is enabled.

disable Disables flooding of packets with unknown multicast addresses.

Table 5 vlan igmp command parameters and variables (Continued)


Description


217459-A

default vlan igmp command

The default vlan igmp command sets all IGMP snooping parameters to the factory default settings. The syntax for the default vlan igmp command is:

default vlan igmp <1-4094> | unknown-mcast-no-flood

The default vlan igmp command is in the config mode.

Table 7 describes the parameters and variables for the default vlan igmp command.

show vlan multicast membership command

The show vlan multicast membership command displays the IP multicast sessions in the network. The syntax for the show vlan multicast membership command is:

show vlan multicast membership <1-4094>

The show vlan multicast membership command is in the privExec mode.

Table 8 describes the parameters and variables for the show vlan multicast membership command.

Table 7 default vlan igmp command parameters and variables


Description

<1-4094> Enter the VLAN to default IGMP settings to factory default.


Sets the flooding packets with unknown multicast addresses to factory default: disabled.

Table 8 show vlan multicast membership command parameters and variables


Description

<1-4094> Specifies the VLAN to display IP multicast sessions.

Chapter 2 Configuring IGMP using the CLI 39


Figure 8 displays sample output from the show vlan multicast membership command.

Figure 8 show vlan multicast membership command output

470_24#show multicast membership 1Multicast Group Address Unit Port----------------------- ---- ---- 2239.255.118.187 1 192239.255.118.187 2 172239.255.118.187 2 192239.255.29.77 2 172239.255.29.77 2 192239.255.118.187 3 172239.255.118.187 3 182239.255.29.77 3 17


217459-A

41


Chapter 3Configuring IGMP using Device Manager

This chapter discusses how to configure IGMP using the Device Manager.

Snoop tab

You can use the Snoop tab to enable or disable IGMP snooping on a switch.

To open the port-based VLAN:

1 From the Device Manager menu bar, choose VLAN > VLANs.

The VLAN dialog box opens with the Basic tab displayed.

2 Click the Snoop tab.

The Snoop tab opens (Figure 9).

Figure 9 Snoop tab

42 Chapter 3 Configuring IGMP using Device Manager

217459-A

Table 9 describes the Snoop tab fields.

Table 9 Snoop tab fields

Field Description

Name Name of the VLAN.

Enable Sets whether IGMP snooping is enabled or disabled.

ReportProxyEnable Sets whether IGMP report proxy is enabled or disabled.

Robustness Allows tuning for the expected packet loss on a subnet. If a subnet is expected to be bad, the Robustness variable can be increased. IGMP is robust to packet losses.

QueryInterval Sets the intervals (in seconds) between IGMP host and query packets transmitted on an interface.

MRouterPorts Specifies the set of ports in the VLAN that provide connectivity to an IP multicast router.

Ver1MRouterPorts Specifies the set of ports in the VLAN that provide connectivity to an IP multicast router using IGMP Version 1.

Ver2MRouterPorts Specifies the set of ports in the VLAN that provide connectivity to an IP multicast router using IGMP Version 2.

ActiveMRouterPorts Read-only field displaying the current active set of ports in the VLAN that provide connectivity to an IP multicast router.

ActiveQuerier This is the IP address of a multicast querier router.

QuerierPort The port that the multicast querier router was heard.

MRouterExpiration The multicast querier router aging that will be timed out.

43


Chapter 4Configuring IGMP using Web-based management

You can use Web-based management to configure VLAN switch ports to optimize IP multicast packets in a bridged Ethernet environment.

This chapter contains the following topics:

• “Configuring IGMP ”

• “Viewing Multicast group membership configurations” on page 47

Configuring IGMP

To configure IGMP:

1 From the main menu, choose Application > IGMP > IGMP Configuration.

The IGMP Configuration page opens (Figure 10).

Figure 10 IGMP Configuration page

44 Chapter 4 Configuring IGMP using Web-based management

217459-A

Table 10 describes the fields on the IGMP Configuration page.

2 In the VLAN row of your choice, click the Modify icon.

The IGMP: VLAN Configuration page opens (Figure 11 on page 45).

Table 10 IGMP Configuration page fields

Field Description

Displays a modification page for the selected VLAN.

VLAN The number assigned to the VLAN when the VLAN was created. For more information on creating VLANs, see Configuring VLANs, Spanning Tree, and MultiLink Trunking (217460-A) .

Snooping The operational status for the IGMP snooping feature.

Proxy If enabled, this feature allows the switch to consolidate IGMP Host Membership Reports received on its downstream ports and to generate a consolidated proxy report for forwarding to its upstream neighbor.

Note: This field affects all VLANs.

Robust Value The predetermined value set by the administrator to offset expected packet loss on a subnet. If packet losses on a subnet are unacceptably high, the Robust Value field can be increased to a higher value.

Note: This field affects only the VLAN specified in the VLAN field.

Query Time The query interval (the interval between general queries sent by the multicast router).

Chapter 4 Configuring IGMP using Web-based management 45


Figure 11 IGMP: VLAN Configuration page

Table 11 describes the fields on the IGMP: VLAN Configuration page.

Table 11 IGMP: VLAN Configuration page fields

Field Range Description

VLAN 1..4094 The number assigned to the VLAN when the VLAN was created. For more information on creating VLANs, see Configuring VLANs, Spanning Tree, and MultiLink Trunking (217460-A) .

Snooping (1) Enabled(2) Disabled

Choose to enable or disable the IGMP snooping feature.


The default setting is Enabled.

Proxy (1) Enabled(2) Disabled

Choose to enable or disable the proxy feature. This feature allows the switch to consolidate IGMP Host Membership Reports received on its downstream ports and to generate a consolidated proxy report for forwarding to its upstream neighbor.


The default setting is Enabled.


217459-A

3 Type information in the text boxes, or select from a list.

4 In the Static Router Ports section, click the check boxes of the router ports to associate with the VLAN.

5 Do one of the following:

• Click Submit.

• Click Back to return to the IGMP page without making changes.

The new configuration is displayed in the IGMP Table (Figure 10 on page 43).

Robust Value 1..64 Type the robust value in the appropriate format. This feature allows you to set the switch to offset expected packet loss on a subnet. If packet losses on a subnet are unacceptably high, the Robust Value field can be increased to a higher value.


The default settings is 2.

Query Time 1..512 Type the query time (in seconds) in the appropriate format. This feature allows you to control the number of IGMP messages allowed on the subnet by varying the Query Interval (the interval between general queries sent by the multicast router).


The default settings is 125 seconds.

Static Router Ports (Version 1 and Version 2)

Click the check boxes of the router ports to associate with the VLAN (alternatively, click the check box to deselect a selected router port).


Table 11 IGMP: VLAN Configuration page fields (Continued)

Field Range Description

Chapter 4 Configuring IGMP using Web-based management 47


Viewing Multicast group membership configurations

You can view a table of configured IP multicast group addresses for a selected VLAN.

To view multicast group membership configurations for a selected VLAN:

1 From the main menu, choose Application > IGMP > IGMP Multicast Group.

The IGMP Multicast Group Membership page opens (Figure 12).

Figure 12 IGMP Multicast Group Membership page

Table 12 describes the fields on the IGMP Multicast Group Membership page.

2 In the Multicast Group Membership Selection section, choose the number of the VLAN on which to view configured IP addresses.

3 Click Submit.

Table 12 IGMP Multicast Group Membership page fields

Section Field Description

Multicast Group Membership Selection (View By)

VLAN Choose the VLAN on which to view configured IP addresses.

Multicast Group Membership Table

Multicast Group Address

The IP multicast group addresses that are currently active on the associated port.

Port The port numbers associated with the IP multicast group addresses displayed in the IP Multicast Group Address field.


217459-A

The results are displayed in the Multicast Group Membership Table (Figure 12 on page 47).

49


Appendix A Quick steps to IGMP snooping

If you are a system administrator with experience configuring IGMP Snooping, use the flowcharts on the following pages as quick configuration guides. The flowcharts refer you to the configuration rules appropriate for this feature.

Configuring IGMP Snooping

To create or modify IGMP Snooping ports, follow the flowcharts in Figures13 on page 50 to 15 on page 52.

To open the IGMP Configuration screen:


50 Quick steps to IGMP snooping

217459-A

Figure 13 Configuring IGMP Snooping (1 of 3)

Yes

No

No

BS45053A

Are VLANscreated/port members

configured?

Is theSnooping field set

correctly?

Yes

IsSnooping field

set?

Yes

Yes

No2

Isthe Proxy field set

correctly?

No

2

IGMP Configuration screen

Go to VLAN flowchart. Create VLANs/ configure port members, as required.

Set the correct valuefor the Snooping field.

Set the correct valuefor the Proxy field.

Off-page reference

On-page reference

Key

Quick steps to IGMP snooping 51



Yes

No

No

BS45054A

Is theRobust Value field

set correctly?

Is the QueryTimer field set

correctly?

Yes

Is the SetRouter Ports field

set correctly?

Yes

Yes

No

Isthe Proxy field set

correctly?

No

3

2

Set the correct value forthe Query Timer field.

Set the correct value forthe Robust Value field.

Set the correct valuefor the Proxy field.

Set the correct value forthe IGMP version in theSet Router Ports field.

Off-page reference

On-page reference

Key

52 Quick steps to IGMP snooping

217459-A


Yes

No

No

All trunk members for that trunkare automatically configured as

IGMP Static Router Ports.

Off-page reference

On-page reference

BS45055B

Key

Are allIGMP members

configured?

Is thePort a trunkmember?

Yes

3

Done

Configure all IGMP members(see "IGMP Configuration Rules").

All VLANs on this port are nowconfigured as IGMP router ports.


53

Index

AActiveQuerier field 42

application setting optionsIGMP 43

Cconfiguration

port-based VLAN 41

configuration rulesIGMP 27Multilink Trunking 27

customer support 18

Ddefault vlan igmp command 38

EEnable 42

IIGMP 21, 35

configuration rules 27

IGMP configuration rules 27

IGMP Multicast Group Membership page 47

IGMP page 43

IGMP snooping 21

IGMP VLAN Configuration page 44

IGMP, configuring 43

MMRouterExpiration field 42

MRouterPorts field 42

multicast 21, 43

Multicast Group Address field 47

NName field 42

Pproduct support 18

proxy 21

Proxy field 44, 45

publications 18

QQuerierPort field 42

Query Time field 44, 46

QueryInterval field 42

RRebustness field 42

Robust Value field 44, 46

Sshow vlan igmp command 35

show vlan multicast membership command 38

Snoop tab 41

54 Index

217459-A

Snooping 21

snooping 35

Snooping field 44, 45

Static Router Ports field 46

support, Nortel 18

Ttechnical publications 18

technical support 18

VVLAN dialog box 42

vlan igmp command 36

vlan igmp unknown-mcast-no-flood command 37

configuring ip multicast routing protocols

Documents