Interconnecting Cisco Network Devices, Part 2 (ICND2): (CCNA Exam 640-802 and ICND exam 640-816), 3rd Edition

Product Description

Authorized Self-Study Guide

Interconnecting Cisco Network Devices, Part 2 (ICND2)

Third Edition

Foundation learning for CCNA ICND2 Exam 640-816

Steve McQuerry, CCIE® No. 6108

Interconnecting Cisco Network Devices, Part 2 (ICND2), is a Cisco®-authorized, self-paced learning tool for CCNA® foundation learning. This book provides you with the knowledge needed to install, operate, and troubleshoot a small to medium-size branch office enterprise network, including configuring several switches and routers, connecting to a WAN, and implementing network security.

In Interconnecting Cisco Network Devices, Part 2 (ICND2), you will study actual router and switch output to aid your understanding of how to configure these devices. Many notes, tips, and cautions are also spread throughout the book. Specific topics include constructing medium-size routed and switched networks, OSPF and EIGRP implementation, access control lists (ACL), address space management, and LAN extensions into a WAN. Chapter-ending review questions illustrate and help solidify the concepts presented in the book.

Whether you are preparing for CCNA certification or simply want to gain a better understanding of how to build medium-size Cisco networks, you will benefit from the foundation information presented in this book.

Interconnecting Cisco Network Devices, Part 2 (ICND2), is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining.

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. He 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.

• Review the Cisco IOS® Software command structure for routers and switches
• Build LANs and understand how to overcome problems associated with Layer 2 switching
• Evaluate the differences between link-state and distance vector routing protocols
• Configure and troubleshoot OSPF in a single area
• Configure and troubleshoot EIGRP
• Identify and filter traffic with ACLs
• Use Network Address Translation (NAT) and Port Address Translation (PAT) to conserve IPv4 address space and implement IPv6

• Connect different sites over WANs or the Internet using IPsec VPN, SSL VPN, leased line, and Frame Relay connections

This volume is in the Certification Self-Study Series offered by Cisco Press®. Books in this series provide officially developed self-study solutions to help networking professionals understand technology implementations and prepare for the Cisco Career Certifications examinations.

Category: Cisco Press—Cisco Certification

Covers: ICND2 Exam 640-816

Sample Pages

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Table of Contents

Foreword

Introduction

Chapter 1 Review of Cisco IOS for Routers and Switches

Chapter Objectives 3

Cisco IOS CLI Functions 4

    Configuration Modes of Cisco IOS Software 4

    Help Facilities of the Cisco IOS CLI 6

    Commands Review 7

    Summary of Cisco IOS CLI Commands 8

Chapter Summary 8

Review Questions 8

Chapter 2 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

Chapter 3 Medium-Sized Routed Network Construction

Chapter Objectives

Reviewing Dynamic Routing

    Understanding Distance Vector Routing Protocols

        Route Discovery, Selection, and Maintenance

        Routing Loops

        Route Maintenance Using Hold-Down Timers

        Route Maintenance Using Triggered Updates

        Route Maintenance Using Hold-Down Timers with Triggered Updates

    Link-State and Advanced Distance Vector Protocols

        Link-State Routing Protocol Algorithms

        Advanced Distance Vector Protocol Algorithm

    Summary of Reviewing Routing Operations

Implementing Variable-Length Subnet Masks

    Reviewing Subnets

        Computing Usable Subnetworks and Hosts

    Introducing VLSMs

    Route Summarization with VLSM

    Summary of Implementing Variable-Length Subnet Masks

Chapter Summary

Review Questions

Chapter 4 Single-Area OSPF Implementation

Chapter Objectives

Introducing OSPF

    Establishing OSPF Neighbor Adjacencies

    SPF Algorithm

    Configuring and Verifying OSPF

    Loopback Interfaces

    Verifying the OSPF Configuration

    Using OSPF debug Commands

    Load Balancing with OSPF

    OSPF Authentication

        Types of Authentication

        Configuring Plaintext Password Authentication

        Example: Plaintext Password Authentication Configuration

        Verifying Plaintext Password Authentication

    Summary of OSPF Introduction

Troubleshooting OSPF

        Components of Troubleshooting OSPF

        Troubleshooting OSPF Neighbor Adjacencies

        Troubleshooting OSPF Routing Tables

        Troubleshooting Plaintext Password Authentication

        Summary of Troubleshooting OSPF

Chapter Summary

Review Questions

Chapter 5 Implementing EIGRP

Chapter Objectives

Implementing EIGRP

    Introducing EIGRP

    Configuring and Verifying EIGRP

    Load Balancing with EIGRP

        EIGRP Metric

        Load Balancing Across Equal Paths

        Configuring Load Balancing Across Unequal-Cost Paths

        Example: Variance

    EIGRP Authentication

        Creating a Key Chain

        Configuring MD5 Authentication for EIGRP

        Example: MD5 Authentication Configuration

        Verifying MD5 Authentication

    Summary of Implementing EIGRP

Troubleshooting EIGRP

    Components of Troubleshooting EIGRP

    Troubleshooting EIGRP Neighbor Relationships

    Troubleshooting EIGRP Routing Tables

    Troubleshooting EIGRP Authentication

        Example: Successful MD5 Authentication

        Example: Troubleshooting MD5 Authentication Problems

    Summary of Troubleshooting EIGRP

Chapter Summary

Review Questions

Chapter 6 Managing Traffic with Access Control Lists

Chapter Objectives

Access Control List Operation

    Understanding ACLs

    ACL Operation

    Types of ACLs

    ACL Identification

    Additional Types of ACLs

        Dynamic ACLs

        Reflexive ACLs

        Time-Based ACLs

    ACL Wildcard Masking

    Summary of ACL Operations

Configuring ACLs

    Configuring Numbered Standard IPv4 ACLs

        Example: Numbered Standard IPv4 ACL—Permit My Network Only

        Example: Numbered Standard IPv4 ACL—Deny a Specific Host

        Example: Numbered Standard IPv4 ACL—Deny a Specific Subnet

    Controlling Access to the Router Using ACLs

    Configuring Numbered Extended IPv4 ACLs

        Extended ACL with the established Parameter

        Numbered Extended IP ACL: Deny FTP from Subnets

        Numbered Extended ACL: Deny Only Telnet from Subnet

    Configuring Named ACLs

        Creating Named Standard IP ACLs

        Creating Named Extended IP ACLs

        Named Extended ACL: Deny a Single Host from a Given Subnet

        Named Extended ACL—Deny a Telnet from a Subnet

    Adding Comments to Named or Numbered ACLs

    Summary of Configuring ACLs

Troubleshooting ACLs

    Problem: Host Connectivity

    Summary of Troubleshooting ACLs

Chapter Summary

Review Questions

Chapter 7 Managing Address Spaces with NAT and IPv6

Chapter Objectives

Scaling the Network with NAT and PAT

    Introducing NAT and PAT

    Translating Inside Source Addresses

        Static NAT Address Mapping

        Dynamic Address Translation

    Overloading an Inside Global Address

    Resolving Translation Table Issues

    Resolving Issues with Using the Correct Translation Entry

    Summary of Scaling the Network with NAT and PAT

Transitioning to IPv6

    Reasons for Using IPv6

    Understanding IPv6 Addresses

        Global Addresses

        Reserved Addresses

        Private Addresses

        Loopback Address

        Unspecified Address

        IPv6 over Data Link Layers

    Assigning IPv6 Addresses

        Manual Interface ID Assignment

        EUI-64 Interface ID Assignment

        Stateless Autoconfiguration

        DHCPv6 (Stateful)

        Use of EUI-64 Format in IPv6 Addresses

    Routing Considerations with IPv6

    Strategies for Implementing IPv6

    Configuring IPv6

        Configuring and Verifying RIPng for IPv6

        Example: RIPng for IPv6 Configuration

    Summary of Transitioning to IPv6

Chapter Summary

Review Questions

Chapter 8 Extending the Network into the WAN

Chapter Objectives

Introducing VPN Solutions

    VPNs and Their Benefits

    Types of VPNs

        Benefits

        Restrictions

    IPsec SSL VPN (WebVPN)

        Benefits

        Restrictions

    Components of VPNs

    Introducing IPsec

    IPsec Protocol Framework

    Summary of Introducing VPN Solutions

Establishing a Point-to-Point WAN Connection with PPP

    Understanding WAN Encapsulations

    Overview of PPP

    Configuring and Verifying PPP

        Example: PPP and CHAP Configuration

        Example: Verifying PPP Encapsulation Configuration

        Example: Verifying PPP Authentication

    Summary of Establishing a Point-to-Point WAN Connection with PPP

Establishing a WAN Connection with Frame Relay

    Understanding Frame Relay

        Example: Frame Relay Terminology—DLCI

        Example: Frame Relay Address Mapping

    Configuring Frame Relay

        Example: Configuring Frame Relay Point-to-Point Subinterfaces

        Example: Configuring Frame Relay Multipoint Subinterfaces

    Verifying Frame Relay

    Summary of Establishing a WAN Connection with Frame Relay

Troubleshooting Frame Relay WANs

    Components of Troubleshooting Frame Relay

    Troubleshooting Frame Relay Connectivity Issues

    Summary of Troubleshooting Frame Relay WANs

Chapter Summary

Review Questions

Appendix Answers to Chapter Review Questions

Index

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