troubleshooting tips for data comms

www.eit.edu.au Technology Training that Workswww.idc-online.com/slideshare

Troubleshooting Tips: Data

Communications, Networking and

TCP/IPby

Steve Mackay


Thank You For Your Interest

If you are interested in further training or information, please visit:

http://www.idc-online.com/slideshare


Overall Presentation

A quick introduction to troubleshooting industrial data communications systems from cabling & hardware; TCP/IP utilities to protocol analysis.


Objectives• Basics of

troubleshooting• Focus on TCP/IP Utilities• Introduction to Protocol

analysis


Topics

• Overall concept• Hardware & Cabling• TCP/IP Utilities• Packet Analysis


1.0 Introduction


Overall Concept


Tools of the trade

• Cable tester• TCP/IP (and other third party) Utilities• Protocol Analyzer (e.g. Wireshark)


2.0 Hardware & Cabling


Hardware and Physical Cabling

• Check cable on both sides of connection• Switch lights• Incorrect wire type and components• Straight versus cross over cable• Excessive untwists• Damaged RJ-45 connector• Electrical noise and shielding


3.0 TCP/IP Utilities


Utilities• Ping• Arp• Netstat• Nbtstat• Ipconfig• Tracert


Ping -t• Easiest ways to test connectivity across the network and

confirm that an IP address is reachable


Arp -a• Displays hardware and IP address mapping

• http://e-spohn.com/blog/2012/05/26/wep-cracking-automated/arp-request-replay/


Netstat-e• Displays activities since

last reboot• Useful data on any

problems


Nbtstat• Protocol Stats & TCP/IP connections

• http://www.windowsecurity.com/articles-tutorials/windows_os_security/Profiling-Operating-System-Part4.html


Ipconfig /all


Tracert


4.0 Packet Analysis


OSI Model


Packet Structure


Thank You For Your Interest

If you are interested in further training or information, please visit:

http://www.idc-online.com/slideshare

troubleshooting tips for data comms

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