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Course Outline
- Introduction to network troubleshooting
- What is network troubleshooting
- Troubleshooting tools
- Troubleshooting methodologies
- Introduction to Wireshark
- How Wireshark Works
- Capturing Packets,
- What are capture and display filters
- Configuring Global Preferences
- Navigation and Colorization Techniques
- Using Time Values and Summaries
- Examining Basic Trace File Statistics
- Save, Export and Print
- Capture and Display Filters
- Capture filters – basics and filter language
- Display filters – basics and filter language
- Useful filters
- Lab exercises and case studies
- Using Time Values and Summaries
- Use the default time column setting and precision
- Use time between packets
- Set a time reference and view capture times
- Troubleshooting timing problems
- Lab exercises and case studies
- Using Statistics Tools
- Create I/O graphs
- Create TCP Time-Sequence graphs
- Analyze flow graphs
- Evaluate service response times
- Create Round-Trip-Time graphs
- Analyze TCP/IP flows
- Analyse applications flows
- Lab exercises and case studies
- The Expert System Basics
- Normal and un-normal Network Communications
- Causes of Performance Problems
- Packet Losses, Ack to longs and Retransmissions
- Lab and case studies
- Bandwidth Issues
- Bandwidth measurement
- User/flow throughput calculations
- Applications throughput calculations
- Bandwidth and throughput problems
- Lab exercises and case studies
- Latency Issues
- The primary points in calculating latency
- Plotting high latency times
- Free latency calculators
- Using the frame.time_delta filter
- Lab exercises and case studies
- Packet Loss and Retransmissions
- Packet loss and recovery - UDP and TCP
- Previous segment lost and Out-of-Order Segments events
- Duplicate ACKs and Fast Retransmissions
- TCP Retransmissions
- Zero window, Window changes and other window problems
- Lab exercises and case studies
Requirements
Basic knowledge in networking and the TCP/IP protocol stack. The participants should come with Laptops with Wireshark software (free download from the site - Www.wireshark.org)
21 Hours
