Smc 9712G Software Configuraton Guide

TigerChassis 10/100/1000

14-Slot Multilayer Chassis Switch

◆ IP routing with RIP and OSPF support

◆ Optional blades include 10BASE-T/100BASE-TX, 100BASE-FX,

1000BASE-SX/LX, 10/100/1000BASE-T, GBIC

◆ 12 slots available for media expansion

◆ 24 Gbps switch fabric for non-blocking switching performance

◆ Security features to prevent intruder access and ensure a safe network

environment

◆ Full support for IEEE 802.1Q VLANs with GVRP

◆ QoS support for IEEE 802.1p priority

◆ IGMP and DVMRP multicast support

◆ Optional redundant power, fan, and switch fabric failover support

◆ Manageable via console, web, SNMP/RMON

◆ Supports CIDR, multinetting

Software Configuraton Guide

SMC9712G

TigerChassis 10/100/1000
Key Information Guide

From SMC’s Tiger line of feature-rich workgroup LAN solutions

38 Tesla
Irvine, CA 92618
Phone: [phone]

February 2002

Pub. # 150200009100A R01

Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable. However, no responsibility is
assumed by SMC for its use, nor for any infringements of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of SMC. SMC reserves the right to
change specifications at any time without notice.

Copyright © 2002 by

SMC Networks, Inc.

38 Tesla

Irvine, CA 92618

All rights reserved. Printed in Taiwan

Trademarks:

SMC is a registered trademark; and TigerChassis is a trademarks of SMC Networks, Inc. Other product and company names are trademarks
or registered trademarks of their respective holders.

L

IMITED

Limited Warranty Statement: SMC Networks, Inc. (“SMC”) warrants its products to be free from defects in workmanship
and materials, under normal use and service, for the applicable warranty term. All SMC products carry a standard 90-day
limited warranty from the date of purchase from SMC or its Authorized Reseller. SMC may, at its own discretion, repair or
replace any product not operating as warranted with a similar or functionally equivalent product, during the applicable
warranty term. SMC will endeavor to repair or replace any product returned under warranty within 30 days of receipt of the
product.

The standard limited warranty can be upgraded to a Limited Lifetime* warranty by registering new products within 30 days
of purchase from SMC or its Authorized Reseller. Registration can be accomplished via the enclosed product registration
card or online via the SMC web site. Failure to register will not affect the standard limited warranty. The Limited Lifetime
warranty covers a product during the Life of that Product, which is defined as the period of time during which the product is
an “Active” SMC product. A product is considered to be “Active” while it is listed on the current SMC price list. As new
technologies emerge, older technologies become obsolete and SMC will, at its discretion, replace an older product in its
product line with one that incorporates these newer technologies. At that point, the obsolete product is discontinued and is
no longer an “Active” SMC product. A list of discontinued products with their respective dates of discontinuance can be
found at:

http://www.smc.com/index.cfm?action=customer_service_warranty.

All products that are replaced become the property of SMC. Replacement products may be either new or reconditioned. Any
replaced or repaired product carries either a 30-day limited warranty or the remainder of the initial warranty, whichever is
longer. SMC is not responsible for any custom software or firmware, configuration information, or memory data of
Customer contained in, stored on, or integrated with any products returned to SMC pursuant to any warranty. Products
returned to SMC should have any customer-installed accessory or add-on components, such as expansion modules, removed
prior to returning the product for replacement. SMC is not responsible for these items if they are returned with the product.

Customers must contact SMC for a Return Material Authorization number prior to returning any product to SMC. Proof of
purchase may be required. Any product returned to SMC without a valid Return Material Authorization (RMA) number
clearly marked on the outside of the package will be returned to customers at customer’s expense. For warranty claims within
North America, please call our toll-free customer support number at [phone]. Customers are responsible for all
shipping charges from their facility to SMC. SMC is responsible for return shipping charges from SMC to customer.

WARRANTIES EXCLUSIVE: IF AN SMC PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE,
CUSTOMER’S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT OF THE PRODUCT IN QUESTION, AT
SMC’S OPTION. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF
ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION
OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES OR CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SMC NEITHER ASSUMES NOR
AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH
THE SALE, INSTALLATION, MAINTENANCE OR USE OF ITS PRODUCTS. SMC SHALL NOT BE LIABLE
UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THE ALLEGED DEFECT IN
THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER’S OR ANY THIRD PERSON’S MISUSE,
NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY
OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR
OTHER HAZARD.

LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT OR TORT (INCLUDING
NEGLIGENCE), SHALL SMC BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR
PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE, LOSS OF BUSINESS, OR OTHER
FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION,

W

ARRANTY

i

L

IMITED WARRANTY

MAINTENANCE, USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF SMC OR
ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES OR THE LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS
AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS,
WHICH MAY VARY FROM STATE TO STATE. NOTHING IN THIS WARRANTY SHALL BE TAKEN TO AFFECT
YOUR STATUTORY RIGHTS.

* SMC will provide warranty service for one year following discontinuance from the active SMC price list. Under the limited
lifetime warranty, internal and external power supplies, fans, and cables are covered by a standard one-year warranty from date
of purchase.

SMC Networks, Inc.

38 Tesla

Irvine, CA 92618

ii

CONTENTS

ABOUT THIS GUIDE

Audience 15
Scope of this Guide 15
Using This Book 15

Finding Information 16
Command Information 17
Conventions 18
Switch SMC9712G Documentation 19

1 DEFAULT SOFTWARE CONFIGURATION

What is Management Software? 21
Summary of Software Features 22
Software Features Explained 23

Duplex Modes 23

Flow Control 23

Traffic Prioritization 23

Security 24

Aggregate Links 24

Broadcast Storm Control 25

Virtual LANs 25

Spanning Tree Protocol 25

IGMP Snooping 25

ARP and Proxy ARP 26

Routing Protocols 26

RMON 26

Roving Analysis 26

Management 27
Default Settings 28

2 PREPARING FOR SYSTEM MANAGEMENT

Methods of Managing a Switch 30
Web Interface Management 30

Accessing the Web Interface 31
CLI Management 32

Accessing the CLI 32

Accessing the CLI through the Console Port 32
Accessing the CLI Over the Network via Direct Telnet 33

Accessing the CLI Over the Network via Indirect Telnet 33
SNMP-Based Network Management 33
Connecting to the System 35

Quick Configuration Reference 35
Saving Configuration Values 35
Initial Access 35
Logging into the System 36
Terminating a Connection 36
Configuring User Names, Passwords and Community Strings 36

Configuring User Logins 37

Determining IP Information 38

Which IP Addresses to Use in Your Network 38

Subnet Masks 38

Default Gateway Router 39

Configuring IP Settings 39

Manual Configuration 39

Automatic Configuration 40

Configuring Access for SNMP Management 40

Using the Web Interface 41

Browser and Platform Requirements 41

Color Recommendations 41

Browser Support 41

Embedded Web Management Applications 42
Interface Description 42
Device View Tab 43

Using Configuration Wizards 44

Using the Device Image 45

Help View Tab 46

Using the Administration Console 47

Administration Console Menus 47
Using Menus to Perform Tasks 48

Selecting Menu Options 48

Navigating Through the Menus 49

Entering a Command String 49

Entering Abbreviated Commands 49

Recommendations for Entering Commands 49

Understanding the Values Presented 50

Including Values in Command Strings 50

Keystroke Functions 50

3 SYSTEM MANAGEMENT FEATURES

Basic Configuration Procedure 52

Configure the Management Module 52
Configure Each Interface Module 52

Setting Baselines 53

Important Considerations 53

Roving Analysis 54

Key Guidelines for Implementation 54
feature rovingAnalysis summary 55
feature rovingAnalysis add 56
feature rovingAnalysis remove 57
feature rovingAnalysis start 57
feature rovingAnalysis stop 58

Security Options 58

system management password 58
security device user summary 59
security device user create 59
security device user modify 59
security device user delete 60
security device access summary 60
security device access modify 60
system management remoteAccess 61
security network access portSecurity 61

Ping 63

protocol ip ping 63

Ping Responses 63

Strategies for Using Ping 63
Upgrading System Software 63
Resetting System Components 64

Reboot the System 64
Reset to Factory Defaults 64
Reset IP Information to Factory Defaults 64

Remote Monitoring (RMON) 65

Overview of RMON 65
RMON Benefits 65
RMON in Your System 66
Supported RMON-1 Groups 66

Statistics Group 66

History Groups 67

Alarm Group 67

Event Group 69

RMON-2 Groups 69

Simple Network Management Protocol (SNMP) 69

Manager/Agent Operation 69
SNMP Messages 70
Trap Reporting 70

Administering SNMP Trap Reporting 70

Supported Trap Reports 71

Interpreting NMM Trap Messages 71
CLI Command List 72

4 ETHERNET PORTS

Ethernet Overview 78

Features 78

Benefits 79

Link Bandwidths 79
Link Availability 79
Other Benefits 79

Key Concepts 80

Ethernet Packet Processing 81

Key Guidelines for Implementation 82

Link Bandwidths 82
Trun ks 82

Administering Ethernet Ports 83

physicalInterface ethernet summary 83
physicalInterface ethernet detail 85
physicalInterface ethernet portState 87
physicalInterface ethernet autoNegotiation 88
physicalInterface ethernet portMode 90
physicalInterface ethernet flowControl 91
physicalInterface ethernet portCapabilities 92

Standards, Protocols, and Related Reading 93

Ethernet Protocol 93
Media Specifications 93
Related Reading 94

5 LINK AGGREGATION

Link Aggregation Overview 96

Features 96
Benefits 96
Key Concepts 96

Port Numbering in a Trunk 96

Key Guidelines for Implementation 98

General Guidelines 98
Trunk Capacity Guidelines 99

Administering Aggregate Links 100

bridge linkAggregation summary 100
bridge linkAggregation detail 101
bridge linkAggregation modify addPort 102
bridge linkAggregation modify removePort 103
bridge linkAggregation modify linkState 104

Standards, Protocols, and Related Reading 104

6 BRIDGING

Bridging Overview 106

Benefits 106

Key Bridging Concepts 107

Learning Addresses 107
Aging Addresses 107
Forwarding, Filtering, and Flooding 108

Loop Detection and Network Resiliency 108
Bridging Implementation Summary 109
Key Guidelines for Implementation 110

Physical Ports and Bridge Ports 110

Option For Fast Aging 110

If You Want To Use STP 110

Port Forwarding Behavior 110

STP Compatible with Trunking 110

Bridge Ports and Trunks 110

Broadcast Limits and Trunks 110
Displaying the Current Configuration 111

bridge summary 111

bridge port summary 113

bridge port detail 114
STP Overview 115

STP Algorithm 115

Bridge Hierarchy 115

Reconfiguring the Bridged Network Topology 116

Resulting Actions 116
Actions That Result from CBPDU Information 117

Spanning Tree Port States 118
STP Bridge and Port Parameters 119

Bridge-wide STP Parameters 119

Bridge-Wide STP State 119
Bridge Priority 119
Bridge Maximum Age 119
Bridge Hello Time 120
Bridge Forward Delay 120

Bridge Port STP Parameters 120

Port Path Cost 120
Port Fast Start 121

Configuring STP 121

bridge spanningTree stpState 121

bridge spanningTree stpPriority 122

bridge spanningTree stpMaxAge 123

bridge spanningTree stpHelloTime 124

bridge spanningTree stpForwardDelay 125

bridge port stpCost 126

bridge port stpFastStart 127
MAC Address Table Design 128

Address Space 128

Important Considerations 128
Address Aging 129

Address Table Dependencies 129

Normal Aging Process 129

If the STP State is Enabled 129

STP Topology Change 130
Port Down Events 130

If the STP State is Disabled 130
Important Considerations 130

Administering the Address Database 132

bridge addressDatabase summary 132
bridge addressDatabase add 133
bridge addressDatabase remove 134
bridge addressDatabase find 134
bridge addressDatabase agingTime 135
bridge addressDatabase flushDynamic 136
bridge addressDatabase flushAll 136

Setting Broadcast Limits 137

bridge broadcastStormControl 137

Standards, Protocols, and Related Reading 138

7 VIRTUAL LANS

VLAN Overview 140

Need for VLANs 140
Benefits 141
Features 141

Key Concepts 142

Related Standards and Protocols 142
Tagging Types 142
VLAN IDs 143
Independent VLAN Learning 143
Terminology 143

Key Guidelines for Implementation 144

Design Guidelines 144
Procedural Guidelines 144
General Guidelines 144

Port-based VLANs 145

The Default VLAN 145

Modifying the Default VLAN 145
Trunking and the Default VLAN 146

User-Configured Port-based VLANs 147

Important Considerations 147
Example 1: A Single VLAN Configuration 148
Example 2: Two VLANs with Untagged Ports 149
Example 3: VLANs with Tagged Ports 150

Rules of VLAN Operation 152

Ingress Rules 152
Egress Rules 154

Standard Bridging Rules for Outgoing Frames 154
Tag Status Rules 154

Examples of Flooding and Forwarding Decisions 154

Example 1: Flooding Decisions for VLANs 154
Example 2: VLAN Exception Flooding 155

Modifying and Removing VLANs 155

Configuring VLANs 156

bridge vlan summary 156

bridge vlan detail 157

bridge vlan create 158

bridge vlan modify addPort 159

bridge vlan modify removePort 160

bridge vlan modify name 160

bridge vlan delete 161
Standards, Protocols, and Related Reading 161

8 MULTICAST FILTERING

IP Multicast Overview 164

Unicast Model 164

Broadcast Model 164

Multicast Model 164

Benefits of IP Multicast 164
How a Network Supports IP Multicast 165

IP Multicast Routing 165

Supporting Protocols in Your Switch 165

IP Multicast Filtering 166

Supporting Protocols in Your Switch 166

Key Concepts 167

Traffic Movement 167

IP Multicast Groups 167

Source-Group Pairs 167

Multicast Addresses 167

Registered Groups 167
Reserved MAC Addresses 168

How IGMP Supports IP Multicast 169

Electing the Querier 169

Query Messages 169

Host Messages 169

Response to Queries 169
Join Message 169
Leave-Group Messages 169

Role of IGMP in IP Multicast Filtering 170
Key Guidelines for Implementation 170

Configuration Procedure 170

Impact of IEEE 802.1Q on Multicasts 170
Configuring IGMP Snooping 171

bridge multicastFilter igmp snoopMode 171
Configuring Multicast Router Ports 172

bridge multicastFilter routerPort summary 172

bridge multicastFilter routerPort autoDiscovery 173

bridge multicastFilter routerPort addPort 173

bridge multicastFilter routerPort removePort 174
Standards, Protocols, and Related Reading 174

9 PRIORITY QUEUEING

Overview 176
Key Concepts 177

Basic Elements of the Standard 177
Format of Prioritized Packets 177
Queues and Priority Levels 178

QoS in Your System 178

QoS Architecture 178

Important Considerations 179

Handling Tagged and Untagged Packets 179

Configuring QoS 180

trafficManagement qos modify 180
bridge port defaultPriority 181

Standards, Protocols, and Related Reading 181

10 IP ROUTING

Routing Overview 184

Routing in a Subnetworked Environment 185
Integrating Bridging and Routing 186
Bridging and Routing Models 186
SMC Bridging and Routing 187
IP Routing Overview 189
Features and Benefits 189

Key Concepts 190

Multiple IP Interfaces per VLAN 190
Media Access Control (MAC) Address 190
Network-Layer Address 190
IP Addresses 191

Dotted Decimal Notation 191
Network Portion 191
Subnetwork Portion 192
Subnet Mask Numbering 193

Variable Length Subnet Masks (VLSMs) 194

How VLSMs Work 194
Guidelines for Using VLSMs 194

Supernetting 195

Step 1 - Select a netmask for each supernet 195
Step 2 - Select a range of addresses for each supernet 196

Supernet Example 197
Router Interfaces 198
Routing Table 198

Default Route 199

VLAN-based Routing 200
Key Guidelines for Implementing IP Routing 200

Configure Trunks (Optional) 200
Configure IP VLANs 200
Establish IP Interfaces 201

Interface Parameters 201
Important Consideration 201
Defining an IP Interface 201

Administering IP Routing 202

Configuring IP Interfaces 203

protocol ip interface summary 203
protocol ip interface create 205
protocol ip interface modify 206
protocol ip interface delete 207

Configuring Static Routes 208

protocol ip route summary 208
protocol ip route add 209
protocol ip route findRoute 210

Important Considerations 210
protocol ip route remove 211
protocol ip route flush 211
protocol ip route default 212
protocol ip route noDefault 212

Address Resolution Protocol (ARP) 213
Configuring the ARP Cache 215

protocol ip arp display 215
protocol ip arp static 216
protocol ip arp remove 217
protocol ip arp flush 217
protocol ip arp flushDynamic 218
protocol ip arp flushFFT 218
protocol ip arp age 219
protocol ip arp statistics 220

ARP Proxy 221

Example 221
protocol ip interface arpproxy 222

Internet Control Message Protocol (ICMP) 223

ICMP Redirect 224

Important Considerations 224

Routing Information Protocol (RIP) 225

Basic RIP Parameters 225

Router Mode 225

Cost 225

Update Time 226

Send and Receive Modes 226

Poison Reverse 226

Advertisement Address 227
RIP-1 Versus RIP-2 227

Important Considerations 227

Configuring RIP 228

protocol ip rip summary 228
protocol ip rip mode 229
protocol ip rip cost 229

Options 229
protocol ip rip sendMode 230
protocol ip rip receiveMode 231
protocol ip rip updateTime 231
protocol ip rip poisonReverse 232
protocol ip rip authenticationMode 233
protocol ip rip statistics 234
protocol ip rip neighbors 234

Domain Name System (DNS) 235

Important Considerations 235

Standards, Protocols, and Related Reading 236

Requests For Comments (RFCs) 236
Standards Organizations 236

11 OSPF ROUTING

OSPF Overview 238

Features 238
Benefits 239

Key Concepts 241

Autonomous Systems 241
Areas 241
Neighbors and Adjacency 241
Router Types 241

Router IDs 242
Protocol Packets 242
How OSPF Routing Works 243

Starting Up 243

Finding Neighbors 243

Establishing Adjacencies 243

Electing the Backup Designated Router 243

Electing the Designated Router 243

Calculating Shortest Path Trees 244

Routing Packets 244

Key Guidelines for Implementing OSPF 245
Autonomous System Boundary Routers 246

Configuring an ASBR 246

Areas 247

Types of Areas 247
Area Border Routers 249
Routing Databases 249
Configuring Route Summarization in ABRs 249
Important Considerations 250

OSPF Interfaces 251

Mode 252
Priority 252

Using Priority to Select a Designated Router 252
Area ID 253

Cost 253

Specifying Cost Metrics for Preferred Paths 253
Delay 254
Hello Interval 254
Retransmit Interval 254
Dead Interval 255
Password 255
Statistics 255
Important Considerations 255

Link State Databases 257

Router Link State Advertisements 257
Network Link State Advertisements 258
Summary Link State Advertisements 258
External Link State Advertisements 259
Important Considerations 260

Neighbors 260

Neighbor Information 260
Static Neighbors 262
Important Considerations 262

Router IDs 263

Important Considerations 263

Stub Default Metrics 264

Important Considerations 264

Virtual Links 265

Important Considerations 266

OSPF Statistics 266
Configuring OSPF 267

protocol ip ospf areas display 267
protocol ip ospf areas defineArea 267
protocol ip ospf areas modifyArea 268
protocol ip ospf areas removeArea 268
protocol ip ospf areas addRange 268
protocol ip ospf areas modifyRange 269
protocol ip ospf areas removeRange 269
protocol ip ospf interface summary 270
protocol ip ospf interface detail 271
protocol ip ospf interface statistics 272
protocol ip ospf interface mode 274
protocol ip ospf interface priority 275
protocol ip ospf interface areaID 275
protocol ip ospf interface cost 276
protocol ip ospf interface delay 276
protocol ip ospf interface hello 277
protocol ip ospf interface retransmit 277
protocol ip ospf interface dead 278
protocol ip ospf interface password 278
protocol ip ospf linkStateData databaseSummary 279
protocol ip ospf linkStateData router 279

protocol ip ospf linkStateData network 281
protocol ip ospf linkStateData summary 282
protocol ip ospf linkStateData external 283
protocol ip ospf neighbors display 284
protocol ip ospf neighbors add 285
protocol ip ospf neighbors remove 285
protocol ip ospf routerID 286
protocol ip ospf stubDefaultMetric display 287
protocol ip ospf stubDefaultMetric define 287
protocol ip ospf stubDefaultMetric remove 288
protocol ip ospf virtualLinks summary 288
protocol ip ospf virtualLinks detail 289
protocol ip ospf virtualLinks statistics 291
protocol ip ospf virtualLinks define 294
protocol ip ospf virtualLinks remove 294
protocol ip ospf virtualLinks areaID 295
protocol ip ospf virtualLinks router 295
protocol ip ospf virtualLinks delay 296
protocol ip ospf virtualLinks hello 296
protocol ip ospf virtualLinks retransmit 297
protocol ip ospf virtualLinks dead 297
protocol ip ospf virtualLinks password 298
protocol ip ospf statistics 298

Standards, Protocols, and Related Reading 299

A TECHNICAL SUPPORT

Online Technical Services 301

World Wide Web Site 301

Support from Your Network Supplier 301

B MANAGEMENT INFORMATION BASE (MIB)

MIB Files 303
Compiler Support 304
MIB Objects 304
MIB Tree 305
MIB-II 306
RMON-1 MIB 306
RMON-2 MIB 307
SMC Enterprise MIBs 307

C TROUBLESHOOTING WEB MANAGEMENT

Browser Issues 309

Web Management and Internet Explorer 309
Improving Device View Download Speed 310
Web Management and Netscape Navigator 311
Additional Resources for Solving Problems 311

INDEX

ABOUT THIS GUIDE

This SMC9712G Software Configuration Guide provides information that you
need to understand and use features of the SMC9712G after you install it and
attach it to your network. This guide describes the commands used to configure
and manage switching modules installed in the SMC9712G chassis. All commands
are processed by the Management Module via a menu-driven command line
interface or Web browser interface. These interfaces are also called the
Administration Console and Web Management, respectively.

Before you start configuring the Switch:

■ Install your switch chassis and modular components. See the SMC9712G

Installation and Maintenance Guide for installation procedures, cabling

information, and environmental information.

■ Read Chapter 1 of this guide, which lists the default settings for each feature.

■ Read Chapter 2 of this guide, which provides an overview of the configuration

process.

Audience This guide is intended for the network administrator who is responsible for

configuring, using, and managing the SMC9712G. It assumes a working
knowledge of local area network (LAN) operations and familiarity with
communications protocols that are used on interconnected LANs.

Scope of this Guide The information in this guide pertains to Release 1.1 software.

The SMC9712G Network Management Module (NMM) is pre-loaded with
software at the factory. However, the software that was loaded on the module
that you received may be an earlier release. Connect to the module and use the

system summary command to determine what release is loaded. Go to the SMC

Web site

http://www.smc.com/index.cfm?action=tech_support_drivers_downloads) to

(
download the latest software.

Using This Book This guide contains information for every command for the SMC9712G. It

includes specific information about command syntax, field descriptions, default
values, and the possible range of values. Some command descriptions include a
section called “Important Considerations” that contains additional information to
be aware of when using the command. It also contains instructional material
about feature concepts and guidelines for using the features. Where appropriate,
examples are provided to help you understand the commands.

16 ABOUT THIS GUIDE

Finding Information Use this chart to help you find information about specific tasks:

If you are looking for information about Turn to

The purpose of this book

Sending feedback on this book

Description of software features

List of default settings for all features

Web Management interface

Command Line Interface

Connecting to the system

Administration Console menus

Configuring parameters, such as password, IP address, community string

Entering full and abbreviated commands

Basic configuration sequence

Description of key management features

Resetting the system and restoring system defaults

How to use Remote Monitoring (RMON)

Configuring SNMP settings, including trap reporting

Administering Ethernet port options such as setting the port speed and
duplex mode

Displaying statistics for Ethernet ports

Increasing point-to-point bandwidth and resiliency by trunking multiple
ports together into one logical port

Displaying the summary bridge configuration

Configuring bridging options such as the aging interval, and bridge-wide
STP

Configuring STP options on individual bridge ports

Listing, adding, or removing information from the address table

Creating and administering virtual LANs (VLANs) Chapter 7:

Filtering IP multicast packets using the Internet Group Management
Protocol (IGMP) function called snooping

Identifying ports attached to multicast routers

Controlling traffic flows with Quality of Service (QoS) by setting the
number of priority queues, as well as setting the default priority for
untagged frames

Configuring IP interfaces and IP protocol parameters, including ARP, RIP,
and CIDR

About This Guide

Chapter 1:
Default Software
Configuration

Chapter 2:
Preparing for
System
Management

Chapter 3:
System
Management
Features

Chapter 4:
Ethernet Ports

Chapter 5:
Link Aggregation

Chapter 6:
Bridging

Virtual LANs

Chapter 8:
Multicast Filtering

Chapter 9:
Priority Queueing

Chapter 10:
IP Routing

Command Information 17

If you are looking for information about Turn to

Technical support Appendix A:

Technical Support

Troubleshooting and improving the performance of Netscape and
Internet Explorer browsers.

Chapter C:
Troubleshooting
Web Management

Displaying all supported MIBs Appendix B:

Management
Information Base
(MIB)

Locating information on tasks and topics quickly Index

Command Information Each software command has its own description in this guide. Each command

description begins at the top of a page. A command description begins with these
items:

■ The complete text of a command

■ A short description of the purpose of the command

■ The command description continues with one or more of the following

sections:

■ Valid Minimum Abbreviation — This section lists the shortest number of

characters that you can type to issue the command.

■ Important Considerations — These usage notes identify potential issues

or requirements.

■ Options — If the command begins a configuration process or other

procedure, this section presents each prompt that you see, its description,

the possible values that you can enter, and the default value.

■ Fields — If the command prompts the Switch to display information, this

section lists the display parameters and their definitions.

■ Procedure — Numbered steps walk you through complex commands.

■ Example — Examples show the interactive display when it provides

additional useful information.

18 ABOUT THIS GUIDE

Conventions Table 1 and Table 2 list conventions that are used throughout this guide.

Table 1 Notice Icons

Icon Notice Type Description

Information note Information that describes important features or instructions

Caution Information that alerts you to potential loss of data or potential

damage to an application, system, or device

Warning Information that alerts you to potential personal injury

Table 2 Text Conventions

Convention Description

Screen displays This typeface represents information as it appears on the screen.

Commands The word “command” means that you type the command exactly as

The words “enter”
and “type”

Keyboard key names If you must press two or more keys simultaneously, the key names are

Words in italics Italics are used to:

shown in the text and then press Return or Enter. Commands appear in
bold. Example:

To remove an IP interface, enter the following command:

protocol ip interface delete

This guide always gives the full form of a command in uppercase and
lowercase letters. However, you can abbreviate commands by entering
only enough characters to differentiate each command. Commands are
not case sensitive.

When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press Return or
Enter when an instruction simply says “type.”

linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

■ Emphasize a point.

■ Denote a new term at the place where it is defined in the text.

■ Identify menu names, menu commands, and software button

names. Examples:

From the Help menu, select Contents.

Click OK.

Switch SMC9712G Documentation 19

Switch SMC9712G
Documentation

The SMC9712G documentation set is comprised of several different titles.

Documents are available in two formats:

■ Paper Documents — All SMC9712G documents (software and hardware

guides), except for release notes (which you must download from the SMC
Web site) are shipped with your chassis.

■ World Wide Web — All user guides and release notes are available in Adobe

Acrobat Reader PDF format from the SMC Web site at:

http://www.smc.com/

You can order an additional printed copy of the SMC9712G Installation and
Maintenance Guide as well as the SMC9712G Software Configuration Guide (as a
packaged set) .

SMC9712G Release Notes are not shipped in paper form. You must download all
release notes from the SMC Web site.

20 ABOUT THIS GUIDE

1

DEFAULT SOFTWARE CONFIGURATION

This chapter contains introductory information about the SMC9712G
management software and how it can be used in your network. It covers the
following topics:

■ What is Management Software?

■ Summary of Software Features

■ Software Features Explained

■ Default Settings

What is Management Software?

Your Network Management Module (NMM) contains software that allows you to
change and monitor the way the Switch works. It also includes Network that
allows the Switch to forward traffic between ports on different interface modules.
You do not need to configure the management software to get the Switch
working. It will operate properly at Layer 2 using the default settings. However,
you will need to use the management software to improve the efficiency of the
Switch and thereby improve the overall performance of your network. Please refer
to Chapter 2 “Preparing for System Management” for information on how to
access the management software.

22 CHAPTER 1: DEFAULT SOFTWARE CONFIGURATION

Summary of Software Features

Table 3 describes the software features that are supported by the SMC9712G
Network Management Module.

Table 3 Software features

Feature Description

No. of MAC Addresses
Supported

No. of IP Interfaces
Supported

No. of Static Routes
Supported

Forwarding Modes Store and forward

Duplex Modes Half and full duplex on all RJ-45 ports,

Flow Control Supported on all ports,

Traffic Prioritization Supports up to four priorities based on IEEE 802.1p

Port Security Supported on all ports by limiting access to known nodes

Aggregate Links Support for 12 Aggregate Links

Broadcast Storm Control Supported

Virtual LANs (VLANs) Support for up to 256 VLANs using the IEEE 802.1Q

Spanning Tree Protocol Supported

Multicast Filtering IGMP Snooping supported

ARP and Proxy ARP Supported

RIP Supported

RMON Four groups supported: Statistics, History, Alarms, Events

Roving Analysis Supported

Management Web interface, command line interface, and SNMP

Up to 32,000

Up to 128

Up to 100

full duplex on all fiber optic ports

back pressure at half duplex and IEEE 802.3x at full duplex

standard

supported

Software Features Explained

Duplex Modes The RJ-45 ports on your Switch can be set to half duplex or full duplex. The fiber

Software Features Explained 23

ports on your switch are fixed at full duplex The duplex modes operate as
described below:

■ Half duplex — Allows packets to be transmitted and received, but not

simultaneously.

■ Full duplex — Allows packets to be transmitted and received simultaneously

and, in effect, doubles the potential throughput of a link. In addition, full
duplex supports longer runs of fiber optic cable.

To communicate effectively, both ends of a link must use the same duplex mode. If
the link uses an auto-negotiating connection, this is done automatically. If the link
uses a connection that is not auto-negotiating, both ends must be set to half
duplex or full duplex manually.

For more information about setting the duplex mode of a port, see
“physicalInterface ethernet portMode” on page 90.

Flow Control All the ports on your Switch support flow control, which is a congestion control

mechanism. Congestion is caused by one or more devices sending traffic to an
already overloaded port on the Switch. Flow control prevents packet loss and
inhibits the devices from generating more packets until the period of congestion
ends.

Flow control is implemented in two ways:

■ Back pressure for ports operating in half duplex.

■ IEEE 802.3x standard for ports operating in full duplex.

For information about enabling flow control on a port, see “physicalInterface
ethernet flowControl” on page 91.

Traffic Prioritization Your Switch supports IEEE 802.1p traffic prioritization, which allows data that has

been assigned a high priority to be forwarded through the Switch without being
obstructed by other data. The system works by using the multiple traffic queues
that are present in the hardware of the Switch — high priority traffic is forwarded
on a different queue from other traffic, and it is always given preference over
other traffic.

Traffic prioritization can be useful for critical applications that require a high
Quality of Service from the network. This could include:

■ Financial applications — Accounts departments that need immediate access

to large files and spreadsheets at the end of the month.

■ CAD/CAM design applications — Design departments that need priority

connections to server farms and other devices for transferring large files.

■ Converged network applications — Organizations with a converged

network (that is, a network that uses the same infrastructure for voice data and
traditional data) that require high quality voice data transmission at all times.

24 CHAPTER 1: DEFAULT SOFTWARE CONFIGURATION

If you use IEEE 802.1p traffic prioritization, we recommend that all relevant ports
on your Switch are placed in one or more Virtual LANs (VLANs) using 802.1Q
tagging. For a brief explanation of VLANs, see “Virtual LANs” on page 25. For
more information, see Chapter 7 “Virtual LANs.”

Security Each port on your Switch can be configured with security features that guard

against unauthorized users connecting devices to your network.

When security mode is set to Continually Learn on a port, it enters Address
Learning Mode. In this mode, the Switch:

■ Removes all the MAC (Ethernet) addresses stored for the port in the Switch

Database.

■ Continually learns the address of packets it receives on the port, overwriting

old addresses if the address budget is exceeded.

■ The address cannot be learned on another port until the address is overwritten,

security is disabled, or the address is manually removed from the database.

When port security mode is set to Auto Learn, it enters Address Learning Mode. In
this mode, the Switch:

■ Removes all the MAC (Ethernet) addresses stored for the port in the Switch

Database.

■ Learns the address of packets it receives on the port until the address budget is

reached.

■ The address is defined as a permanent entry.

■ The address cannot be learned on another port until security is disabled or the

address is manually removed from the database.

■ No other address can be learned until security is disabled or the address is

manually removed from the database.

When port security mode is set to Auto Learn and to Disconnect Unauthorized
Device, then once the address budget is filled:

■ The port is disabled if a different address is seen on the port.

Up to 896 addresses may be learned by the entire system. If security is enabled for
a port, then you must provide the budget (or maximum number of addresses to be
learned) for each port. For information, see “security network access portSecurity”
on page 61.

Aggregate Links Your Switch can support 12 aggregate links — connections that allow devices to

communicate using up to four links in parallel. Port trunks provide two benefits:

■ They can potentially double, triple or quadruple the bandwidth of a

connection.

■ They can provide redundancy — if one link is broken, the other links share the

traffic for that link.

An aggregate link can only be created if the ports at both ends of each link are
configured as aggregate links.

For more information, see Chapter 5 “Link Aggregation.”