Troubleshooting Tips for Data Comms

transcript

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

Engineering