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| Introduction | |
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| Planning Maintenance for Complex Networks | |
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| Applying Maintenance Methodologies | |
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| Maintenance Models and Methodologies | |
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| Determining Procedures and Tools to Support Maintenance Models | |
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| Maintenance Processes and Procedures | |
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| Network Maintenance Task Identification | |
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| Network Maintenance Planning | |
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| Scheduling Maintenance | |
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| Formalizing Change-Control Procedures | |
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| Establishing Network Documentation Procedures | |
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| Establishing Effective Communication | |
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| Defining Templates/Procedures/Conventions (Standardization) | |
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| Planning for Disaster Recovery | |
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| Network Monitoring and Performance Measurement | |
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| Network Maintenance Tools, Applications, and Resources | |
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| Fundamental Tools, Applications, and Resources | |
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| Configuration and Documentation Tools | |
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| Logging Services | |
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| Network Monitoring and Performance Measurement Tools | |
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| Implementing Backup and Restore Services | |
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| Disaster Recovery Tools | |
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| Summary | |
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| Review Questions | |
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| Troubleshooting Processes for Complex Enterprise Networks | |
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| Troubleshooting Methodologies | |
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| Troubleshooting Principles | |
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| Structured Troubleshooting Approaches | |
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| Top-Down Troubleshooting Method | |
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| Bottom-Up Troubleshooting Method | |
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| Follow-the-Path Troubleshooting Method | |
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| Spot-the-Differences Troubleshooting Method | |
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| Move-the-Problem Troubleshooting Method | |
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| Troubleshooting Example: Methodologies | |
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| Implementing Troubleshooting Procedures | |
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| The Troubleshooting Process | |
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| Defining the Problem | |
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| Gathering and Analyzing Information | |
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| Eliminating Possible Problem Causes | |
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| Formulating/Testing a Hypothesis | |
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| An Example on Elimination and Assumptions | |
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| Solving the Problem | |
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| Integrating Troubleshooting into the Network Maintenance Process | |
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| Troubleshooting and Network Maintenance | |
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| Documentation | |
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| Creating a Baseline | |
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| Communication and Change Control | |
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| Change Control | |
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| Summary | |
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| Review Questions | |
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| Using Maintenance and Troubleshooting Tools and Applications | |
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| Using Cisco IOS Software for Maintenance and Troubleshooting | |
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| Collecting and Filtering Information Using Cisco IOS show Commands | |
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| Testing Network Connectivity Using ping and Telnet | |
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| Collecting Real-time Information Using Cisco IOS debug Commands | |
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| Debug ip packet | |
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| [access-list-number][detail] | |
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| Debug ip rip | |
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| Diagnosing Hardware Issues Using Cisco IOS Commands | |
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| Checking CPU Utilization | |
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| Checking Memory Utilization | |
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| Checking Interfaces | |
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| Using Specialized Maintenance and Troubleshooting Tools | |
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| Categories of Troubleshooting Tools | |
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| Using Traffic-Capturing Tools | |
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| SPAN and RSPAN | |
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| Gathering Information with SNMP | |
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| Gathering Information with NetFlow | |
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| Enabling Network Event Notification | |
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| Summary | |
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| Review Questions | |
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| Maintaining and Troubleshooting Campus Switched Solutions | |
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| Troubleshooting VLANs | |
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| LAN Switch Operation | |
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| Verifying Layer 2 Forwarding | |
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| Troubleshooting Spanning Tree | |
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| Spanning-Tree Operation | |
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| Electing a Root Bridge | |
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| Electing a Root Port | |
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| Electing Designated Ports | |
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| Ports Going into Blocking, or Learning, and Forwarding State | |
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| Analyzing the Spanning-Tree Topology | |
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| Spanning-Tree Failures | |
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| EtherChannel Operation | |
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| Troubleshooting Example: Switch Replacement Gone Bad | |
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| Troubleshooting Switched Virtual Interfaces and Inter-VLAN Routing | |
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| Inter-VLAN Routing and Multilayer Switching | |
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| Switched Virtual Interfaces and Routed Ports | |
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| Troubleshooting First-Hop Redundancy Protocols | |
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| Using First-Hop Redundancy | |
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| Verifying FHRP Operation | |
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| Alternatives to HSRP | |
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| Summary | |
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| Review Questions | |
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| Maintaining and Troubleshooting Routing Solutions | |
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| Troubleshooting Network Layer Connectivity | |
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| Routing and Routing Data Structures | |
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| Using IOS Commands to Verify Routing Functions | |
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| Troubleshooting EIGRP | |
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| EIGRP Routing Review | |
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| Monitoring EIGRP | |
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| Troubleshooting Example: Routing Problem in an EIGRP | |
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| Network | |
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| Troubleshooting OSPF | |
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| OSPF Data Structures | |
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| OSPF Information Flow Within an Area | |
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| OSPF Information Flow Between Areas | |
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| Cisco IOS OSPF Commands | |
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| Troubleshooting Example: Routing Problem in an OSPF Network | |
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| Troubleshooting Route Redistribution | |
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| Route Injection and Redistribution Process | |
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| Verifying and Troubleshooting Route Propagation | |
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| Troubleshooting Example: Redistribution from OSPF to EIGRP | |
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| Troubleshooting BGP | |
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| BGP Route Processing and Data Structures | |
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| BGP Routing Information Flow | |
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| Cisco IOS BGP Commands | |
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| Troubleshooting Example: Routing Problem in a BGP Network | |
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| Summary | |
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| Review Questions | |
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| Troubleshooting Addressing Services | |
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| Identify Common IPv4 Addressing Service Issues | |
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| NAT/PAT Operation | |
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| Troubleshooting Common NAT/PAT Issues | |
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| Troubleshooting Example: NAT/PAT Problem Caused by a | |
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| Routing Issue | |
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| Troubleshooting Example: NAT Problem Caused by an Inaccurate | |
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| Access List | |
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| Reviewing DHCP Operation | |
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| Common DHCP Troubleshooting Issues | |
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| DHCP Troubleshooting Tips and Commands | |
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| DHCP Troubleshooting Example: Problems After a Security Audit | |
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| DHCP Troubleshooting Example: Duplicate Client IP Addresses | |
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| DHCP Troubleshooting Example: Relay Agent Issue | |
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| Identify Common IPv6 Routing Issues | |
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| IPv6 Routing | |
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| Troubleshooting IPv6 Issues | |
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| IPv6 Troubleshooting Example: Stateless Autoconfiguration Issue | |
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| IPv6 Troubleshooting Example: Redistribution Issue | |
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| IPv6 Troubleshooting Example: OSPFv3 Configuration Errors | |
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| IPv6 Troubleshooting Example: OSPFv3 over 6to4 Tunnel | |
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| Summary | |
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| Review Questions | |
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| Troubleshooting Network Performance Issues | |
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| Troubleshooting Network Applications Services | |
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| Network Application Services | |
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| NetFlow | |
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| Cisco IP SLA | |
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| NBAR | |
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| SLB | |
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| QoS and AutoQoS | |
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| Common Issues with Network Application Services | |
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| Common NetFlow Issues | |
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| Common IP SLA Issues | |
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| Common NBAR Issues | |
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| Common AutoQoS Issues | |
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| Troubleshooting Example: Network Application Services Problem | |
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| NetFlow Troubleshooting Example | |
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| IP SLA Troubleshooting Example | |
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| AutoQoS Troubleshooting Example | |
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| Troubleshooting Performance Issues on Switches | |
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| Identifying Performance Issues on Switches | |
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| Troubleshooting Switch Interface Performance Problems | |
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| Switch Port/Interface Issues | |
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| Troubleshooting Example: Duplex Problem | |
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| Auto-MDIX | |
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| The Forwarding Hardware | |
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| Troubleshooting TCAM Problems | |
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| Control Plane: Troubleshooting High CPU Load on Switches | |
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| DHCP Issues | |
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| Spanning-Tree Issues | |
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| HSRP | |
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| Switch Performance Troubleshooting Example | |
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| Speed and Duplex Settings | |
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| Switch Performance Troubleshooting Example: Excessive Broadcasts | |
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| Switch Performance Troubleshooting Example: Excessive Security | |
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| Troubleshooting Performance Issues on Routers | |
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| Troubleshooting High CPU Usage Issues on Routers | |
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| Troubleshooting Switching Paths | |
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| Process Switching | |
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| Fast Switching | |
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| Cisco Express Forwarding | |
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| Troubleshooting Process and Fast Switching | |
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| Troubleshooting CEF | |
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| IOS Tools to Analyze Packet Forwarding | |
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| Troubleshooting Router Memory Issues | |
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| BGP Memory Use | |
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| Summary | |
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| Review Questions | |
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| Troubleshooting Converged Networks | |
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| Troubleshooting Converged Networks to Support Wireless Operations | |
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| Common Wireless Integration Issues | |
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| WLAN Connectivity Troubleshooting Example: Misconfigured Trunk | |
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| WLAN Connectivity Troubleshooting Example: Duplex and Trust Issues | |
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| WLAN Connectivity Troubleshooting Example: LWAPP Denied by New | |
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| Security Implementations | |
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| WLAN Connectivity Troubleshooting Example: DHCP Issues | |
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| Troubleshooting Unified Communications Issues in a Converged Network | |
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| Common Unified Communications Integration Issues | |
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| Unified Communications Troubleshooting Example: Port Security and | |
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| Voice VLAN Issues | |
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| Unified Communications Troubleshooting Example: Invalid Marking of | |
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| VoIP Packets | |
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| Unified Communications Troubleshooting Example: ACL and | |
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| Trunk Issues | |
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| Troubleshooting Video Issues in a Converged Network | |
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| Common Video-Integration Issues | |
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| Video-Integration Troubleshooting Example: Performance Issues Due to | |
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| STP Topology | |
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| Video-Integration Troubleshooting Example: IP Multicast | |
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| Configuration Error | |
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| Summary | |
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| Review Questions | |
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| Maintaining and Troubleshooting Network Security | |
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| Implementations | |
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| Troubleshooting Secure Networks | |
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| Troubleshooting Challenges in Secured Networks | |
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| Security Features Review | |
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| Troubleshooting Management Plane Security | |
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| The Management Plane | |
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| Securing the Management Plane | |
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| Troubleshooting Security Implementations in the Management Plane | |
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| Troubleshooting Control Plane Security | |
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| Securing the Control Plane | |
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| Troubleshooting Security Implementations in the Control Plane | |
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| Troubleshooting Data Plane Security | |
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| Securing the Data Plane | |
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| Securing the Data Plane Using IOS Stateful Packet Inspection | |
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| Securing the Data Plane Using the Zone-Based Policy Firewall | |
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| Other Methods of Securing the Data Plane | |
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| Troubleshooting Security Implementations in the Data Plane | |
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| Troubleshooting Branch Office and Remote Worker Connectivity | |
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| Branch Office and Remote Worker Connectivity | |
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| Identifying Issues with Branch Office and Remote Worker Connectivity | |
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| Branch Office/Remote Worker Troubleshooting Example: Address | |
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| Translation Error | |
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| Branch Office/Remote Worker Troubleshooting Example | |
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| Crypto Map ACL Error | |
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| Branch Office/Remote Worker Troubleshooting Example: GRE | |
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| Configuration Error | |
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| Branch Office/Remote Worker Troubleshooting Example: Recursive | |
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| Routing Problem | |
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| Branch Office/Remote Worker Troubleshooting Example: ACL Denies | |
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| IPsec Protocols | |
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| Summary | |
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| Review Questions | |
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| Review and Preparation for Troubleshooting Complex Enterprise | |
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| Networks | |
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| Review of Key Maintenance and Troubleshooting Concepts and Tools | |
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| Applying Maintenance and Troubleshooting Concepts and Tools | |
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| Summary | |
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| Answer to Review Questions | |
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| Index | |