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Building Cisco Multilayer Switched Networks BCMSN Building Cisco Multilayer Switched Networks Volume 2 Version 2.2 Student Guide CLS Production Services: 08.05.05 The PDF files and any printed representation for this material are the property of Cisco Systems, Inc., for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. Copyright © 2005, Cisco Systems, Inc. All rights reserved. Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed on the Cisco Website at www.cisco.com/go/offices. Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China PRC • Colombia • Costa Rica Croatia • Cyprus • Czech Republic • Denmark • Dubai, UAE • Finland • France • Germany • Greece Hong Kong SAR • Hungary • India • Indonesia • Ireland • Israel • Italy • Japan • Korea • Luxembourg • Malaysia Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines • Poland • Portugal • Puerto Rico • Romania Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain • Sweden • Switzerland Taiwan • Thailand • Turkey • Ukraine • United Kingdom • United States • Venezuela • Vietnam • Zimbabwe Copyright © 2005 Cisco Systems, Inc. All rights reserved. CCSP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, SwitchProbe, TeleRouter, The Fastest Way to Increase Your Internet Quotient, TransPath, and VCO are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries. All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0501R) DISCLAIMER WARRANTY: THIS CONTENT IS BEING PROVIDED “AS IS.” CISCO MAKES AND YOU RECEIVE NO WARRANTIES IN CONNECTION WITH THE CONTENT PROVIDED HEREUNDER, EXPRESS, IMPLIED, STATUTORY OR IN ANY OTHER PROVISION OF THIS CONTENT OR COMMUNICATION BETWEEN CISCO AND YOU. CISCO SPECIFICALLY DISCLAIMS ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. This learning product may contain early release content, and while Cisco believes it to be accurate, it falls subject to the disclaimer above. The PDF files and any printed representation for this material are the property of Cisco Systems, Inc., for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. Table of Contents Volume 2 Course Introduction 1 Overview 1 Learner Skills and Knowledge 1 Course Goal and Objectives 2 Course Flow 3 Additional References 4 Cisco Glossary of Terms 4 Your Training Curriculum 5 CCNP Career Certifications 5 Designing a Network Using the Campus Infrastructure Module 1-1 Overview 1-1 Module Objectives 1-1 Describing the Campus Infrastructure Module 1-3 Overview 1-3 Objectives 1-3 Devices in a Nonhierarchical Network 1-4 Layer 2 Network Issues 1-6 Routed Network Issues 1-7 What Is a Multilayer Switch? 1-8 Issues with Multilayer Switches in a Nonhierarchical Network 1-10 Enterprise Composite Network Model 1-11 Enterprise Composite Network Model Functional Areas 1-12 Enterprise Composite Network Model Benefits 1-13 Benefits of the Enterprise Composite Network Model 1-14 Modules of the Enterprise Campus 1-15 Campus Infrastructure Module 1-16 Summary 1-18 Deploying Technology in the Campus Infrastructure Module 1-19 Overview 1-19 Objectives 1-19 Issues in a Poorly Designed Network 1-20 Designing a Hierarchical IP Addressing Scheme 1-22 Guidelines for Applying IP Address Space in the Enterprise Network 1-23 Interconnection Technologies 1-24 Determining Equipment and Cabling Needs 1-26 References 1-27 Mapping VLANs in a Hierarchical Network 1-28 Traffic Types 1-29 Considering Traffic Source-to-Destination Path 1-31 Cisco Catalyst Configuration Interfaces 1-32 Catalyst Software Interface 1-32 Example: Using Catalyst Software Commands 1-32 Cisco IOS Interface 1-33 Example: Using IOS Commands 1-33 Configuration Interface Available on Various Catalyst Platforms 1-34 Summary 1-35 Module Summary 1-37 References 1-37 Module Self-Check 1-39 Module Self-Check Answer Key 1-40 Defining VLANs 2-1 Overview 2-1 The PDF files and any printed representation for this material are the property of Cisco Systems, Inc., for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. Module Objectives 2-1 Implementing VLANs 2-3 Overview 2-3 Objectives 2-3 What Is an End-to-End VLAN? 2-4 Example: VLAN Implementation 2-5 What Is a Local VLAN? 2-6 VLAN Configuration Modes 2-8 VLAN Database Mode 2-9 Example: Creating a VLAN in VLAN Database Mode 2-9 What Are VLAN Access Ports? 2-10 Benefits of Local VLANs in the Enterprise Composite Network Model 2-12 VLAN Implementation Commands 2-14 How to Implement a VLAN 2-16 1. Create or Configure a VLAN 2-17 2. Verify VLAN Configuration 2-18 3. Associate Switch Ports with the VLAN 2-19 4. Verify Switch Port Configuration 2-19 5. Test VLAN Connectivity 2-20 6. Implement Switch and VLAN Security Measures 2-20 Summary 2-21 Supporting Multiple VLANs on a Single Trunk 2-23 Overview 2-23 Objectives 2-23 What Is a VLAN Trunk? 2-24 What Is a VLAN Trunking Protocol? 2-25 Comparing ISL and 802.1Q Trunking Protocols 2-26 ISL Trunking Protocol 2-27 ISL Encapsulation Process 2-28 ISL Header 2-28 ISL Trailer 2-29 References 2-30 802.1Q Trunking Protocol 2-31 802.1Q Tagging Process 2-32 What Is an 802.1Q Native VLAN? 2-33 Example: Native VLAN Implementation—Two End Devices on the Same Switch Port 2-34 Issues with 802.1Q Native VLANs 2-35 VLAN Ranges 2-36 Identifying the Modes for Dynamic Trunking Protocol 2-38 Trunking Configuration Commands 2-39 How to Configure Trunking 2-40 Configuring an ISL Trunk 2-41 Configuring a Port for ISL Trunking with No DTP 2-42 Verifying the ISL Trunk Configuration 2-43 Configuring an 802.1Q Trunk 2-44 Example: Configuring a Port for 802.1Q Trunking 2-45 Verify the 802.1Q Configuration 2-46 Example: Configure and Display Port Information for an 802.1Q Dynamic Trunk Link 2-47 Example: Displaying Trunk Information for 802.1Q Trunking 2-47 Using Trunking Protocols in the Campus Infrastructure Module 2-48 Resolving Trunk Link Problems 2-49 Summary 2-50 Propagating VLAN Information with VTP 2-51 Overview 2-51 Objectives 2-51 What Is a VTP Domain? 2-52 What Is the VTP Protocol? 2-53 ii Building Cisco Multilayer Switched Networks (BCMSN) v2.2 © 2005, Cisco Systems, Inc. The PDF files and any printed representation for this material are the property of Cisco Systems, Inc., for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. VTP in the Campus Infrastructure Module 2-53 References 2-54 VTP Modes 2-55 Describing VTP Operation 2-57 Configuration Revision Number 2-58 VTP Advertisement Types 2-58 VTP Versions 2-58 References 2-59 VTP Configuration Commands 2-60 How to Configure a VTP Management Domain 2-62 Configuring VTP on a Switch 2-63 Verifying the VTP Configuration 2-65 VTP Counters 2-66 Common Problems with VTP Configuration 2-66 Best Practices: Configuring Switches in a VTP Domain 2-68 How to Add a New Switch to an Existing VLAN 2-69 Summary 2-71 Module Summary 2-73 References 2-73 Module Self-Check 2-75 Module Self-Check Answer Key 2-76 Implementing Spanning Tree 3-1 Overview 3-1 Module Objectives 3-1 Defining the Spanning Tree Protocol 3-3 Overview 3-3 Objectives 3-3 Transparent Bridges 3-4 Identifying Traffic Loops 3-5 Example: Flooded Unicast Frames and Bridge Loops 3-5 Preventing Loops on a Layer 2 Network 3-6 802.1D Spanning Tree Protocol 3-7 Spanning Tree Communication 3-8 What Is a Root Bridge? 3-9 BPDU Fields Associated with Root Bridge Selection 3-10 Bridge ID Field in the BPDU 3-11 Identifying the Root Selection Process 3-12 802.1D Port Roles 3-13 Forming an Association with the Root Bridge 3-14 Path Cost 3-15 Selecting the Root Port 3-16 Selecting the Designated Port 3-17 Example: Determining the Active Topology 3-18 Summary 3-19 Maintaining and Configuring STP 3-21 Overview 3-21 Objectives 3-21 Identifying Spanning Tree Port States and Timers 3-22 Spanning Tree Timers 3-23 Identifying Topology Changes 3-24 What Is a Backup Root Bridge? 3-25 Priority Commands 3-26 How to Configure a Root Bridge 3-27 Comparing CST and PVST 3-28 Example: Comparing CST and PVST 3-28 Summary 3-29 References 3-29 © 2005, Cisco Systems, Inc.
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