Fluke Network Tester Problems NetTool Detects, Things to Consider, Link Connectivity Problems

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Common Problems

6

Problems NetTool Detects

Things to Consider

Problems NetTool Detects

You can think of problems fitting into one of two categories: link connectivity or network. Link connectivity problems relate to cabling or cabling properties while network problems involve PC/network configuration settings or PC-to-server interactions.

Generally, you encounter network problems while setting up or changing a PC’s connection to the network. These types of problems can often be resolved by checking the network settings on the PC.

With a single-ended connection, NetTool can only report Unwanted Protocols and link connectivity level problems. An inline connection is required for all other problems. The different types of connections are discussed in Chapter 2.

NetTool enables you to see on which side the problem exists; that is, whether it is a problem between the PC and NetTool or whether it is between NetTool and the network itself. Whether it is a cabling problem or a protocol mismatch, NetTool helps you isolate a problem and keep things running.

This section lists by category the problems that NetTool can detect. For each problem, an explanation (if needed) is given and possible corrective steps are provided.

Every network is complex and the solutions given are meant to assist you with troubleshooting. This is not an exhaustive troubleshooting guide.

Link Connectivity Problems

The problems listed in this section involve cabling or cabling properties.

Problem: Speed mismatch

Explanation: The network is running at 10 Mbps and the PC is running at 100 Mbps (or vice versa). This speed mismatch prevents connection to the network.

Remedy: Correct the speed mismatch by making sure both devices are running at the same speed.

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Contents NetTool Limited Warranty and Limitation of Liability Table of Contents NetTool Iii Common Problems Appendices NetTool List of Tables Viii List of Figures NetTool Introduction Using This Manual What is NetTool?NetTool Features Care and MaintenancePackage Contents Optional Accessories Service and AdjustmentRegistering NetTool Contacting Fluke Networks PC/NetTool Link Utility ProgramsNetTool Blaster Turning on NetTool Installing and Running the Link UtilitiesGetting Acquainted NetTool ToolkitUnderstanding the LEDs Link/Collision/Error LEDUtilization LED Icons NetTool MenusMain Menu Navigation Keys ScrollingUsing the AC Adapter Power SupplyMaximizing Battery Life Installing the BatteriesUpdating NetTool’s Software Configuring NetTool Setting Up and Connecting NetToolIntroduction Settings Menu Changing the System SettingsManually Assigning NetTool an IP Address Identifying Unwanted ProtocolsCreating a List of IP Addresses to Ping Selecting a Language for the Display ScreensObtaining Information about Your NetTool Connecting a Patch Cable Connecting NetToolSingle-Ended Connection Single-Ended Connection into a Wall Jack Inline Connection between a PC Network Inline ConnectionSerial Port Connection Recommended speed setting for the serial port isRunning AutoTest AutoTestCable Test Results WiremapCable Length, Opens, Shorts, and Splits Network Drop Single-Ended AutoTest ResultsNetwork Device Services NetTool Discovers DeviceInline between a Device and the Network Inline AutoTest ResultsLink and Polarity Level Indicator Definition Inline between a PoE Powered Device and the Network NetTool Verifying a Device’s Configuration Troubleshooting a Network DeviceViewing Link Status Information Link Configuration DetailsHealth Details Checking Frames for ErrorsSelect Protocols Screen Tracking ProtocolsAddresses Used Screen Obtaining a Device’s IP Address InformationVlan Information Identifying Network ResourcesNetTool Finding Out About Your Network Troubleshooting NetworksSegment ID Screen Identifying the Network TypeIdentifying Key Devices Troubleshooting NetworksPinging a Single Device PingAssigning an IP Address to NetTool Ping Pinging Multiple Devices Ping Results Screen Displaying the Problem Log Common ProblemsProblem Log Understanding the Problem Log DisplayLink Connectivity Problems Problems NetTool DetectsThings to Consider Problem Transmit pair open Health Problems Network ProblemsNetWare Problem Ethernet frame-type mismatchesTCP/IP Host ConfigurationProblem Wins resolution failed Name ResolutionNetBIOS Web Problem PC involved in MB electionsPrinter Problem Unable to connect to POP3 serverUnwanted protocols when enabled Verifying Voice over IP Service Viewing Vlan and CDP Information Viewing PoE Voltage and Pair InformationVoIP Log VoIP LogRTP drop Viewing Call Quality MeasurementsBefore You Begin Creating and Managing ReportsReporter Menu Creating a ReportDeleting or Overwriting a Report NetTool Appendix Title AppendicesPage General Specifications SpecificationsEnvironmental Requirements Temperature ApprovalsSample VoIP Call Logs Dhcp ACK Typical Cisco Skinny Sccp Phone BootupAppendices Start Media Xmit Typical Cisco Skinny Sccp Call LogSample VoIP Call Logs B Typical Cisco Skinny Sccp Call Log Typical SIP Phone Bootup Log Typical SIP Phone Bootup Log Typical SIP Call Log Typical SIP Call Log 10BASE2 Glossary802.2 Access Method802.3 AnomalyAttenuation ARP Address Resolution ProtocolBridge Switch Characteristic impedanceCrosstalk ClientCollision Crossed PairEthernet Destination AddressEIA568 EncapsulationIP Internet Protocol Full-DuplexHalf-Duplex Icmp Internet Control and Message ProtocolLate Collision JabberJitter LAN Local Area NetworkNVP Nominal Velocity of Propagation NIC Network Interface CardPing Node NumberRouter or Gateway RJ-45 ConnectorRemote Collision RepeaterRunts SAP Service Advertising ProtocolSignal/Noise Ratio Rtcp Real-time Transport Control ProtocolSplit Pair Snap Subnetwork Access ProtocolSnmp Simple Network Management Protocol Source AddressTransceiver TopologyUptime TransportIndex NetTool Index NetTool