Summary

Learn the concepts on the new CCNA 640-802 and ICND2 640-816 exams with the only Cisco authorized self-study guide.

Author Biography

Steve McQuerry, CCIE No. 6108, is a consulting systems engineer with Cisco focused on data center architecture. Steve works with enterprise customers in the Midwestern United States to help them plan their data center architectures. Steve has been an active member of the internetworking community since 1991 and has held multiple certifications from Novell, Microsoft, and Cisco. Before joining Cisco, Steve worked as an independent contractor with Global Knowledge, where he taught and developed coursework around Cisco technologies and certifications.

Foreword
ntroduction
Review of Cisco IOS for Routers and Switches Chapter Objectives	p. 3
Cisco IOS CLI Functions	p. 4
Configuration Modes of Cisco IOS Software	p. 4
Help Facilities of the Cisco IOS CLI	p. 6
Commands Review 7
Summary of Cisco IOS CLI Commands 8 Chapter Summary 8 Review Questions	p. 8
Medium-Sized Switched Network Construction Chapter Objectives
Implementing VLANs and Trunks
Understanding VLANs
VLAN Overview
Grouping Business Functions into VLANs
Applying IP Address Space in the Enterprise Network
Example: Network Design
Considering Traffic Source to Destination Paths
Voice VLAN Essentials
VLAN Operation
Understanding Trunking with 802.1Q
802.1Q Frame
802.1Q Native VLAN
Understanding VLAN Trunking Protocol
VTP Modes
VTP Operation
VTP Pruning
Configuring VLANs and Trunks
VTP Configuration
Example: VTP Configuration
802.1Q Trunking Configuration
VLAN Creation
VLAN Port Assignment
Adds, Moves, and Changes for VLANs
Adding VLANs and Port Membership
Changing VLANs and Port Membership
Deleting VLANs and Port Membership
Summary of Implementing VLANs and Trunks
Improving Performance with Spanning Tree
Building a Redundant Switched Topology
Choosing Interconnection Technologies
Determining Equipment and Cabling Needs
EtherChannel Overview
Redundant Topology
Recognizing Issues of a Redundant Switched Topology
Switch Behavior with Broadcast Frames
Broadcast Storms
Example: Broadcast Storms
Multiple Frame Transmissions
Example: Multiple Transmissions
MAC Database Instability
Resolving Issues with STP
Spanning-Tree Operation
Example: Selecting the Root Bridge
Example: Spanning-Tree Operation
Example: Spanning-Tree Path Cost
Example: Spanning-Tree Recalculation
STP Convergence
Per VLAN Spanning Tree+
PVST+ Operation
Rapid Spanning Tree Protocol
Per VLAN RSTP
Multiple Spanning Tree Protocol
RSTP Port Roles
Configuring RSTP
Summary of Improving Performance with Spanning Tree
Routing Between VLANs
Understanding Inter-VLAN Routing
Example: Router on a Stick
Example: Subinterfaces
Configuring Inter-VLAN Routing
Summary of Routing Between VLANs
Securing the Expanded Network
Overview of Switch Security Concerns
Securing Switch Devices
Securing Switch Protocols
Mitigating Compromises Launched Through a Switch
Describing Port Security
802.X Port-Based Authentication
Summary of Securing the Expanded Network
Troubleshooting Switched Networks
Troubleshooting Switches
Troubleshooting Port Connectivity
Hardware Issues
Configuration Issues
Troubleshooting VLANs and Trunking
Native VLAN Mismatches
Trunk Mode Mismatches
VLANs and IP Subnets
Inter-VLAN Connectivity
Troubleshooting VTP
Unable to See VLAN Details in the show run Command Output
Cisco Catalyst Switches Do Not Exchange VTP Information
Recently Installed Switch Causes Network Problems
All Ports Inactive After Power Cycle
Troubleshooting Spanning Tree
Use the Diagram of the Network
Identify a Bridging Loop
Log STP Events
Temporarily Disable Unnecessary Features
Designate the Root Bridge
Verify the Configuration of RSTP
Summary of Troubleshooting Switched Networks
Chapter Summary
Review Questions
Medium-Sized Routed Network Constructio
Table of Contents provided by Publisher. All Rights Reserved.

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Excerpts

Introduction IntroductionSince the introduction of the personal computer in the early 1970s, businesses have found more uses and applications for technology in the workplace. With the introduction of local-area networks, file sharing, and print sharing in the 1980s, it became obvious that distributed computing was no longer a passing fad. By the 1990s, computers became less expensive, and innovations such as the Internet allowed everyone to connect to computer services worldwide. Computing services have become large and distributed. The days of punch cards and green-bar paper are behind us, and a new generation of computing experts is being asked to keep this distributed technology operational. These experts are destined to have a new set of issues and problems to deal with, the most complex of them being connectivity and compatibility among differing systems and devices.The primary challenge with data networking today is to link multiple devices' protocols and sites with maximum effectiveness and ease of use for end users. Of course, this must all be accomplished in a cost-effective way. Cisco offers a variety of products to give network managers and analysts the ability to face and solve the challenges of internetworking.In an effort to ensure that these networking professionals have the knowledge to perform these arduous tasks, Cisco has developed a series of courses and certifications that act as benchmarks for internetworking professionals. These courses help internetworking professionals learn the fundamentals of internetworking technologies along with skills in configuring and installing Cisco products. The certification exams are designed to be a litmus test for the skills required to perform at various levels of internetworking. The Cisco certifications range from the associate level, Cisco Certified Network Associate (CCNA), through the professional level, Cisco Certified Network Professional (CCNP), to the expert level, Cisco Certified Internetwork Expert (CCIE).The Interconnecting Cisco Network Devices, Part 2 (ICND2) course is one of two recommended training classes for CCNA preparation. As a self-study complement to the course, this book helps to ground individuals in the fundamentals of switches and routed internetworks. It presents the concepts, commands, and practices required to configure Cisco switches and routers to operate in corporate internetworks. You will be introduced to all the basic concepts and configuration procedures required to build a multiswitch, multirouter, and multigroup internetwork that uses LAN and WAN interfaces for the most commonly used routing and routed protocols. ICND provides the installation and configuration information that network administrators require to install and configure Cisco products.Interconnecting Cisco Network Devices, Part 2 (ICND2),is the second part of a two-part, introductory-level series and is recommended for individuals who have one to three years of internetworking experience, are familiar with basic internetworking concepts, and have basic experience with the TCP/IP protocol. While the self-study book is designed for those who are pursuing the CCNA certification, it is also useful for network administrators responsible for implementing and managing small- and medium-sized business networks. Network support staff who perform a help-desk role in a medium- or enterprise-sized company will find this a valuable resource. Finally, Cisco customers or channel resellers and network technicians entering the internetworking industry who are new to Cisco products can benefit from the contents of this book. GoalsThe goal of this book is twofold. First, it is intended as a self-study book for the ICND2 test 640-816 and the CCNA test 640-802, which are part of the requirements for the CCNA certification. Like the certification itself, the book should help readers