Chapter H Dhcp | HP Transcend Traffix Manager specs

158CHAPTER H: DHCP

(with the old MAC address) will also remain on the Map. There will therefore be two devices on the Map with the same IP address, although with different MAC addresses. Any conversation data retrieved for this IP address is subsequently assigned to the new device. This continues until the next time Traffix Manager detects that a MAC address has changed.

Therefore, multiple objects can appear in the Map with the same Network Layer address, although with a different MAC address attribute. These are represented by a unique icon.

Each IP address listed in the DhcpDB file is polled every <POLLINGINTERVAL> minutes, using a Netbios NCBSTAT request. This request returns the MAC address of the device, provided the device supports Netbios. Windows-based operating systems and DOS support Netbios, but other systems, such as UNIX, generally do not.

You can edit the polling interval in the DhcpDB file. However, decreasing the polling interval to less than 30 minutes would not enable Traffix Manager to detect changes in MAC addresses more accurately, as data is only stored at 60-minute granularity.

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HP Transcend Traffix Manager manual Chapter H Dhcp

Contents

User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Part II HOW Traffix Manager Works Collecting Data Displaying Connections To and From Objects Overview Predefined Event Rules Viewing Events Report Types Using the SubnetsDB File How Subnet Grouping Works 3Com Agents Supported Interface Types Snmp Tables used by Traffix Manager Monitoring Network Segments Using RMON-1 AgentsOnline Technical Services 163 World Wide Web Site Page Documentation Where to find specific informationAbout this Guide If you are looking for Turn to Appendix a Text Conventions ConventionsList conventions that are used throughout this guide Icon Description Related Terminology UsedThis Guide Documents Pddtechpubscomments@3com.com CommentsMiscellaneous 3Com Year 2000 Web YearCompliance Getting Started with Traffix Manager Page Traffix Manager Overview Traffix Manager Overview How Does Traffix Manager Work? Traffix Manager Gathers Data from the Network Strategy for New Users Traffix Manager Overview Launching Traffix Manager For the First Time Installing RmonTranscend NCS Network Administration Guide for Agents on Your Server LaunchingTraffix Manager Client Launching the Traffix Manager Client Managerwindow Traffix Manager Main Window Grouping devices Main WindowReference Minus sign next to the group Menu Option Function Display Reports CollectionEvents Help Traffix Manager Main Window Menu Options HOW Traffix Manager Works Page Manager Processes Collecting DataHow Traffix Collected Data Collected Data is added to a Relational Database Rmon Overview How Traffix This chapter contains the following sections MAPOverview Geographical location Predefined attributes you can change these or add your own AttributesBe familiar with the concepts of attributes and groupings Unknown, or unassigned Installdir Records an entry for both devices and both devices appear GroupingsAssigning MAC Addresses Device a with the MAC address of the router Groupings Deselect Collapse Redundant Grouping Select this grouping Groupings Groupings dialog box III Running Traffix ManagerPage Manager Client Launching Traffix Manager After the First TimeLaunching a Traffix After the first time. It contains the following sections There are two access levels for running the client Configuring Agents for Data Collection Interfaces Configuring Agents for Data Collection Level Description Community Access LevelsAdding and Editing Agents Polling Agents Over a WAN Link Viewing Agent StatisticsPolling for Data Collection Suspending and Resuming Data Collection Manually Finding Agents for Data Collection Configuring Agents for Data Collection Traffic Data Displaying Network Traffic Main WindowLoading Network You make these selections in the Load Traffic dialog box Window Working withObjects in the Main Selecting Displaying NetworkGroup Statistics Them Description of Display Buttons ObjectsFrom Objects Protocols Applications Favorites Displaying Network Traffic in the Main Window RMON-2 Limitations Displaying Network Traffic in the Main Window Displaying Traffic in Graphs Information about selected items Using the Graph Panel Items in the Map Using the LaunchGraph Dialog Box Launch Graph dialog box Using the Launch Graph Dialog Box Displaying Traffic in Graphs Using Event Rules Using Event Rules Examples of Event Rules Monitor Network Resource Usage Monitor Critical Devices Monitor Critical Connections Monitor Network Trends Specifying Devices Selecting Protocols Spotting General Long Term Trends Specifying the Time FilterSpecifying Sensitivity Enforcing Corporate Policy About Network Usage Monitoring Which Devices Are Using a ServerMaintaining Network Security Monitoring Protocol Usage Monitoring Congestion on WAN Links Monitoring WAN Links and BackboneDetecting Unauthorized Servers Detecting Network Misuse Using Event Rules Viewing Events Viewing Events You use the Event List to display information about events By severity Filter dialog box Print By event ruleDo not summarize Events ViewingManaging Selected Click Add Configuring Traffix Manager to Forward Events as Snmp TrapsConfiguring an Open Management Platform OMP Forwarding Events as Snmp Traps Viewing Events Overview of Reporting During a specified period Reports Daily Reports Time Line for Daily Report Generation Weekly Reports Monthly Reports Report Manager has three main areas Report Manager Managing Reports Reports Scheduling ReportsRunning Ad Hoc Managing Raw Data Managing Reports Change the lifetime of that raw report data or output Traffix Manager Strategy forReporting Use Graphs to Identify Key Components Quickly Effects of Grouping On Reports Report Types Report Connection Activity Report ChartsReport Section Chart Title Device Activity External Traffic flowing into or out of the group only Group ActivityThere are three ways you can report on groups Internal Traffic flowing within the group only Segment Activity Report Charts Unusual error totals. These baselines are calculated Top N Connections Received over the report period Top N Connections Report Charts Top N Connections Report Charts Top N Devices Report Charts Top Devices Remainder are grouped as other Device History Top N Groups Report Charts Top N Groups Top N Segments Percentage of errorsTop N Segments Report Charts Segments report Top N Segments Report Charts Utilization Appendices and Index Page Running Traffix Manager, and their solutions Troubleshooting Traffix ManagerTroubleshooting Contains descriptions of problems you might encounter when Reports Reporting features of Traffix ManagerDiagnosing Traffix Manager Problems If Browser is not in your path message is displayed Internal traffic Error could not Appendix a Troubleshooting Traffix Manager Traffix Control Panel This appendix contains Network over time DatabaseThese applications help you to manage and organize a number Provides the following applications for managing databases Database Maintenance Clean databases Repair databases Optimize databases Install\traffix\config Upgrading Traffix Manager Deinstalling Traffix To deinstall Traffix Manager 2.0 for NT Manager Appendix B Database Management Using Traffix Control Panel Aggregation DefaultAggregating Devices Local Domain Specification Selecting the Default Aggregation Action Setting a Maximum Device Limit Com SubnetsDB File Using the Subnetsdb FileUsing File can be edited and reapplied at any time Class Description How Subnet Grouping Works Appendix D Using the Subnetsdb File Automatic Attribute Assignment Overview Contents User-defined Attributes Configuration File Mylookup fileattrs.exe c\my data\data.txt True Attribute Using the fileattrs ProgramPerforming Assignment True Appendix E Automatic Attribute Assignment Lookup2 Lookup2 Companies dblookup.exe c\data\companies.mdb Installdir\TraffixServer\examples All example programs are included There is one version in Visual Basic and one in C Simple attribute lookup process in C Example Programs Name Language Description Library functions available FunctionDescription Function Description GetAttribute Appendix E Automatic Attribute Assignment Supported RMON-2 Devices Types Appendix F Supported RMON-2 Devices Firmware to 3Com Configuring 3COMDownloading Standalone Agents RMON-2 Agents RMON-1 Table Sizes RMON-2 Table SizesPage Appendix G Configuring 3COM Standalone RMON-2 Agents What Effect Do Manager MonitorsDhcp Devices Dhcp Devices Have Chapter H Dhcp Monitoring Using RMON-1 AgentsUsing RMON-1 Network Segments Appendix I Using RMON-1 Agents Mandatory Comments RetrievalSnmp Tables used by Traffix Manager ProtoDist For protocol distribution reports only Technical Support ServicesServices Online Technical Hours a day, 7 days a week Access by Analog ModemUsername anonymous Country Data Rate Telephone Number 408 727 Access by Digital Modem847 262 Europe, South Africa, and Middle East Country Telephone Number Asia, Pacific Rim Country Telephone Number Fax Number Page Glossary Glossary Glossary Glossary Glossary Tree See Object List Index Numbers Community names definition 53 overview Dhcp 153 Html Detecting unauthorized machine access RMON-2 Snmp User Authorization dialog box 50 User Guide Structure Index 3Com Corporation Limited Warranty Limitation of Liability