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Chapter 2: LAN Redundancy

  • 2.0 LAN Redundancy
    • 2.0.1 Introduction
      • 2.0.1.1 Introduction
      • 2.0.1.2 Class Activity - Stormy Traffic
  • 2.1 Spanning Tree Concepts
    • 2.1.1 Purpose of Spanning Tree
      • 2.1.1.1 Redundancy at OSI Layers 1 and 2
      • 2.1.1.2 Issues with Layer 1 Redundancy: MAC Database Instability
      • 2.1.1.3 Issues with Layer 1 Redundancy: Broadcast Storms
      • 2.1.1.4 Issues with Layer 1 Redundancy: Duplicate Unicast Frames
      • 2.1.1.5 Packet Tracer - Examining a Redundant Design
    • 2.1.2 STP Operation
      • 2.1.2.1 Spanning Tree Algorithm: Introduction
      • 2.1.2.2 Spanning Tree Algorithm: Port Roles
      • 2.1.2.3 Spanning Tree Algorithm: Root Bridge
      • 2.1.2.4 Spanning Tree Algorithm: Path Cost
      • 2.1.2.5 802.1D BPDU Frame Format
      • 2.1.2.6 BPDU Propagation and Process
      • 2.1.2.7 Extended System ID
      • 2.1.2.8 Activity - Identify 802.1D Port Roles
      • 2.1.2.9 Video Demonstration - Observing Spanning Tree Protocol Operation
      • 2.1.2.10 Lab – Building a Switched Network with Redundant Links
  • 2.2 Varieties of Spanning Tree Protocols
    • 2.2.1 Overview
      • 2.2.1.1 List of Spanning Tree Protocols
      • 2.2.1.2 Characteristics of the Spanning Tree Protocols
      • 2.2.1.3 Activity - Identify Types of Spanning Tree Protocols
    • 2.2.2 PVST+
      • 2.2.2.1 Overview of PVST+
      • 2.2.2.2 Port States and PVST+ Operation
      • 2.2.2.3 Extended System ID and PVST+ Operation
      • 2.2.2.4 Activity - Identifying PVST+ Operation
    • 2.2.3 Rapid PVST+
      • 2.2.3.1 Overview of Rapid PVST+
      • 2.2.3.2 RSTP BPDU
      • 2.2.3.3 Edge Ports
      • 2.2.3.4 Link Types
      • 2.2.3.5 Activity - Identify Port Roles in Rapid PVST+
      • 2.2.3.6 Activity - Compare PVST+ and Rapid PVST+
  • 2.3 Spanning Tree Configuration
    • 2.3.1 PVST+ Configuration
      • 2.3.1.1 Catalyst 2960 Default Configuration
      • 2.3.1.2 Configuring and Verifying the Bridge ID
      • 2.3.1.3 PortFast and BPDU Guard
      • 2.3.1.4 PVST+ Load Balancing
      • 2.3.1.5 Packet Tracer - Configuring PVST+
    • 2.3.2 Rapid PVST+ Configuration
      • 2.3.2.1 Spanning Tree Mode
      • 2.3.2.2 Packet Tracer - Configuring Rapid PVST+
      • 2.3.2.3 Lab - Configuring Rapid PVST+, PortFast and BPDU Guard
    • 2.3.3 STP Configuration Issues
      • 2.3.3.1 Analyzing the STP Topology
      • 2.3.3.2 Expected Topology versus Actual Topology
      • 2.3.3.3 Overview of Spanning Tree Status
      • 2.3.3.4 Spanning Tree Failure Consequences
      • 2.3.3.5 Repairing a Spanning Tree Problem
      • 2.3.3.6 Activity - Troubleshoot STP Configuration Issues
  • 2.4 First Hop Redundancy Protocols
    • 2.4.1 Concept of First Hop Redundancy Protocols
      • 2.4.1.1 Default Gateway Limitations
      • 2.4.1.2 Router Redundancy
      • 2.4.1.3 Steps for Router Failover
      • 2.4.1.4 Activity - Identify FHRP Terminology
    • 2.4.2 Varieties of First Hop Redundancy Protocols
      • 2.4.2.1 First Hop Redundancy Protocols
      • 2.4.2.2 Activity - Identify the Type of FHRP
    • 2.4.3 FHRP Verification
      • 2.4.3.1 HSRP Verification
      • 2.4.3.2 GLBP Verification
      • 2.4.3.3 Syntax Checker - HSRP and GLBP
      • 2.4.3.4 Lab - Configuring HSRP and GLBP
  • 2.5 Summary
    • 2.5.1 Summary
      • 2.5.1.1 Class Activity - Documentation Tree
      • 2.5.1.2 Summary
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