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module12: Network Troubleshooting - Coggle Diagram
module12: Network Troubleshooting
12.3 Troubleshooting Tools
12.3.3 Hardware Troubleshooting Tools
Cable Testers
Cable Analyzers
Digital Multimeters
Portable Network Analyzers
Cisco Prime Network Analysis Module
12.3.4 Syslog Server as a Troubleshooting Tool
12.3.2 Protocol Analyzers
12.3.1 Software Troubleshooting Tools
Knowledge Bases
Baselining Tools
Network Management System Tools
12.5 Troubleshooting IP Connectivity
12.5.6 Troubleshoot VLAN Assignment Example
Arp Table
MAC table on Switch
Correct the VLAN Assignament
12.5.7 Step 4 - Verify Default Gateway
12.5.8 Troubleshoot IPv6 Default Gateway Example
12.5.1 Components of Troubleshooting End-to-End Connectivity
12.5.10 Step 6 - Verify the Transport Layer
12.5.11 Step 7 - Verify ACLs
12.5.12 Step 8 - Verify DNS
12.5.3 Step 1 - Verify the Physical Layer
Output queue drops
Input errors
Input queue drops
Output errors
12.5.2 End-to-End Connectivity Problem Initiates Troubleshooting
IPv4 traceroute
IPv6 ping and traceroute
IPv4 ping
12.5.4 Step 2 - Check for Duplex Mismatches
12.5.9 Step 5 - Verify Correct Path
12.2 Troubleshooting Process
12.2.2 Seven-Step Troubleshooting Process
12.2.3 Question End Users
12.2.1 General Troubleshooting Procedures
12.2.4 Gather Information
12.2.5 Troubleshooting with Layered Models
12.2.6 Structured Troubleshooting Methods
Divide-and-Conquer
Follow-the-Path
Top-Down
Substitution
Bottom-Up
Comparison
Educated Guess
12.2.7 Guidelines for Selecting a Troubleshooting Method
12.1 Network Documentation
12.1.2 Network Topology Diagrams
Logical IPv4 Topology
Logical IPv6 Topologyn
Physical Topology
12.1.1 Documentation Overview
12.1.3 Network Device Documentation
LAN Switch Device Documentation
End-system Documentation Files
Router Device Documentation
2.1.4 Establish a Network Baseline
12.1.5 Step 1 - Determine What Types of Data to Collect
12.1.6 Step 2 - Identify Devices and Ports of Interest
12.1.7 Step 3 - Determine the Baseline Duration
12.1.8 Data Measurement
12.4 Symptoms and Causes of Network Problems
12.4.3 Network Layer Troubleshooting
12.4.4 Transport Layer Troubleshooting - ACLs
12.4.2 Data Link Layer Troubleshooting
12.4.5 Transport Layer Troubleshooting - NAT for IPv4
12.4.1 Physical Layer Troubleshooting
12.4.6 Application Layer Troubleshooting
