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Troubleshooting TCP/IP Fundamentals (TTCP)

Detailed Course Outline

Introduction to Troubleshooting
  • Network Management
  • Network Management Tools and Software
  • Key Management Areas
  • ISO Functional Areas
  • OSI Model
  • Overview of Layer Functions
  • OSI and TCP/IP Models Compared
  • Example Protocols at each Layer
Basic PC Configuration
  • Twisted Pair Problems
  • Ethernet Full & Half Duplex
  • Ethernet Auto Sense or Auto Negotiate?
  • Auto Sense
  • Auto Negotiate
  • Symptoms of Duplex Mismatch
  • Duplex Settings on a Standard NIC (MS Windows)
  • Switch Functionality
  • Switch Monitor or Mirror Port
  • Spanning Tree
  • Address & Name Resolution
  • IP Configuration MS-Windows
  • Advanced DNS Settings MS-Windows
  • MS-Windows Local Name Resolution
  • View IP Configuration: ipconfig/all
  • Additional IP ipconfig Functions
  • Dynamic Host Configuration Protocol
  • Automatic Private IP Addressing (APIPA)
  • ARP Cache: arp -a
Troubleshooting Tools
  • Troubleshooting Tools
  • ICMP
  • Type 3: destination unreachable
  • Ping
  • ICMP Redirect Message
  • Traceroute
  • Graphical Traceroute Examples
  • NSLOOKUP
  • NETSTAT
  • Cable Tester/LAN Meter
  • Protocol Analyzer
  • SNMP
  • Private MIB Object Example
  • SNMP/MIB Implementation Example
  • Your Brain
Displaying Information on Cisco & Juniper Devices
  • Cisco Wake-up Screens (router)
  • Cisco show Commands (router)
  • Cisco show Commands (switch)
  • Cisco show cdp neighbor (s or r)
  • Cisco show cdp neighbors detail
  • Cisco show ip interface brief (r)
  • Cisco show ip protocols (router)
  • Cisco show ip route (router)
  • Cisco show ip arp (router)
  • Cisco show controllers serial x
  • Cisco show interface x (switch)
  • Cisco show running-config (r)
  • Cisco show running-config (s)
  • POST failure
  • JUNOS OS: Logging In
  • CLI Modes
  • Entering Configuration Mode
  • Committing a Configuration
  • Initial Configuration
  • Viewing the Results
  • Interface Naming
  • Interface Configuration Example
  • Tracking Interface State
  • Extensive Output Example
  • Network Utilities: Part 1
  • Network Utilities: Part 2
  • Network Utilities: Part 3
  • Displaying the Junos OS Release
  • Display Routing Information
TCP/IP Overview
  • Overview
  • TCP/IP is almost never a fault
  • 50% of network problems are hardware-related
  • 49% of network problems are configuration errors
  • If ping works ...
  • MS-Windows network cannot find neighbors
  • MS-Windows sees no other PCs
  • Using ping effectively
Troubleshooting Methods 1
  • Before the trouble starts...
  • OSI Model Overview
  • Know your protocols and OSI layers
  • Baselining
  • Know your devices
  • Know your applications
  • Know your troubleshooting tools
  • Graphical Device Management Tools
  • Documentation & Archiving
Troubleshooting Methods 2
  • So, the trouble has started...
  • Before you change anything ...
  • Pay attention
  • Ask questions
  • What to look for with a protocol analyzer
  • Sherlock Holmes' Principle
  • Before changing anything ...
  • Control the process
  • Change one variable at a time
 

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