troubleshooting your network

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Troubleshooting Your Network

Networking for Home and Small Businesses – Chapter 9

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Objectives

Troubleshooting process

Utilities used to verify TCP/IP connectivity

Hardware and connection issues in wired and wireless networks

Documenting problems and interacting with a help desk

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The Troubleshooting ProcessTroubleshooting is the process of identifying, locating and correcting problems

= postup při pojmenování, nalezení a odstraňování problémů

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The Troubleshooting Process Gathering Information = shromáždění informací

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The Troubleshooting Process

Bottom – up = zdola nahoru. Pomalý, ale solidní přístup.

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The Troubleshooting Process

Top - down = shora dolů. Hodí se tam, kde podezíráme uživatele.

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The Troubleshooting ProcessDivide – and – conquer = rozděl a panuj. Začneme uprostřed a podle nálezu postupujeme dolů nebo nahoru. Vhodné pro případy s jasnými příznaky a pro zkušené techniky.

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The Troubleshooting Process

Trial – and – error = pokus a omyl. Uděláme kvalifikovaný odhad a zkusíme, je-li to ono.

Substitution = výměna. Vadný díl nebo zařízení vyměníme za jiné. Tím problém přesuneme na jinou dobu, jinou osobu, nebo vyřešíme za cenu vyšších nákladů. Hodí se v případě laciných a/nebo neopravitelných dílů.

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Utilities Used to Verify TCP/IP Connectivity

SW Utilities

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Utilities Used to Verify TCP/IP Connectivity Ipconfig

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Utilities Used to Verify TCP/IP Connectivity ping

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Utilities Used to Verify TCP/IP Connectivity Tracert

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Utilities Used to Verify TCP/IP Connectivity netstat

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Utilities Used to Verify TCP/IP Connectivity nslookup

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Hardware and Connection Issues in Wired & Wireless Networks Isolating connectivity issues

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Hardware and Connection Issues in Wired & Wireless Networks Purpose of LED indicators and their meaning

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Hardware and Connection Issues in Wired & Wireless Networks Connection issues with wired networks

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Hardware and Connection Issues in Wired & Wireless Networks Radio issues with a wireless network

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Hardware and Connection Issues in Wired & Wireless Networks

Association and authentication issues within a wireless network

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Hardware and Connection Issues in Wired & Wireless Networks DHCP Issues

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Hardware and Connection Issues in Wired & Wireless Networks Troubleshooting Integrated Router to ISP connections

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Utilizing the Troubleshooting Process for Documentation and Help Desk Interactions Documentation

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Utilizing the Troubleshooting Process for Documentation and Help Desk Interactions

Using outside sources of help

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Utilizing the Troubleshooting Process for Documentation and Help Desk Interactions Using the Helpdesk

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Summary

Effective troubleshooting combines instinct, experience, and structured techniques to identify, locate, and correct network or computer problems.

Documentation is essential in effective troubleshooting, and should contain baseline information about the network.

A large proportion of networking problems relate to physical components.

Many networking problems can be identified with software utilities such as ping, tracert, and netstat.

In a network containing both wired and wireless connections, it is important to isolate the problem to either the wired or wireless network.

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