How Subnet Grouping Works | HP Transcend Traffix Manager manual

Using the SubnetsDB File 135

How Subnet Grouping Works

4If you already have devices showing in the Map, reload the subnets attributes using the Reload Attributes dialog box, which you access from the Edit menu in the main window.

5Create a subnets grouping. See “Predefined Groupings” on page 43 for information on how to create a site-specific subnet grouping.

6Apply the grouping.

Subnet grouping works in the following way:

■The subnet address and mask are combined with a Boolean AND operation to produce a key.

For example, when the subnet address 140.6.0.0 is given the Boolean AND command with the mask 255.255.0.0 the resulting key is:

140.6.0.0=10001100000001100000000000000000

255.255.0.0=11111111111111110000000000000000 Result of AND=10001100000001100000000000000000

■To determine whether a device qualifies for a subnet, the key value is compared with the value created by ANDing the subnet mask with the device's IP address. If these values are not equal, Traffix Manager does not accept the devices as part of the subnet.

For example, Traffix Manager has detected a device with the IP address 140.7.0.6. To determine whether the device qualifies for the pc subnet, Traffix Manager does the following calculation:

140.7.0.6=10001100000001110000000000000110

255.255.0.0=11111111111111110000000000000000 Result of AND=10001100000001110000000000000000

Since the results are not equal, Traffix Manager concludes that the device is not part of the pc subnet.

■When matching subnets and devices, Traffix Manager assumes that the best match for a device is the subnet with the most set bits in the mask.

Image 135

HP Transcend Traffix Manager manual How Subnet Grouping Works

Contents

User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Part II HOW Traffix Manager Works Collecting Data Overview Predefined Event Rules Displaying Connections To and From Objects Viewing Events Report Types 3Com Agents Supported Interface Types Using the SubnetsDB File How Subnet Grouping Works Monitoring Network Segments Using RMON-1 Agents Online Technical Services 163 World Wide Web SiteSnmp Tables used by Traffix Manager Page If you are looking for Turn to Where to find specific informationAbout this Guide Documentation Appendix a Icon Description ConventionsList conventions that are used throughout this guide Text Conventions Documents Terminology UsedThis Guide Related Comments MiscellaneousPddtechpubscomments@3com.com Year Compliance3Com Year 2000 Web Getting Started with Traffix Manager Page Traffix Manager Overview Traffix Manager Overview How Does Traffix Manager Work? Traffix Manager Gathers Data from the Network Users Strategy for New Traffix Manager Overview Agents on Your Installing RmonTranscend NCS Network Administration Guide for Launching Traffix Manager For the First Time Client LaunchingTraffix Manager Server Launching the Traffix Manager Client Traffix Manager Main Window Managerwindow Minus sign next to the group Main WindowReference Grouping devices Display Menu Option Function Help CollectionEvents Reports Traffix Manager Main Window Menu Options HOW Traffix Manager Works Page Collected Data Collecting DataHow Traffix Manager Processes Collected Data is added to a Relational Database Rmon Overview How Traffix Geographical location MAPOverview This chapter contains the following sections Unknown, or unassigned AttributesBe familiar with the concepts of attributes and groupings Predefined attributes you can change these or add your own Installdir Device a with the MAC address of the router GroupingsAssigning MAC Addresses Records an entry for both devices and both devices appear Groupings Select this grouping Deselect Collapse Redundant Grouping Groupings Groupings dialog box Running Traffix Manager IIIPage After the first time. It contains the following sections Launching Traffix Manager After the First TimeLaunching a Traffix Manager Client There are two access levels for running the client Interfaces Configuring Agents for Data Collection Configuring Agents for Data Collection Community Access Levels Adding and Editing AgentsLevel Description Suspending and Resuming Data Collection Manually Viewing Agent StatisticsPolling for Data Collection Polling Agents Over a WAN Link Finding Agents for Data Collection Configuring Agents for Data Collection You make these selections in the Load Traffic dialog box Displaying Network Traffic Main WindowLoading Network Traffic Data Working with Objects in the MainWindow Them Displaying NetworkGroup Statistics Selecting Objects From ObjectsDescription of Display Buttons Protocols Applications Favorites Displaying Network Traffic in the Main Window RMON-2 Limitations Displaying Network Traffic in the Main Window Information about selected items Displaying Traffic in Graphs Panel Using the Graph Using the Launch Graph Dialog BoxItems in the Map Launch Graph dialog box Using the Launch Graph Dialog Box Displaying Traffic in Graphs Using Event Rules Using Event Rules Rules Examples of Event Monitor Critical Devices Monitor Network Resource Usage Monitor Network Trends Monitor Critical Connections Selecting Protocols Specifying Devices Specifying the Time Filter Specifying SensitivitySpotting General Long Term Trends Monitoring Protocol Usage Monitoring Which Devices Are Using a ServerMaintaining Network Security Enforcing Corporate Policy About Network Usage Detecting Network Misuse Monitoring WAN Links and BackboneDetecting Unauthorized Servers Monitoring Congestion on WAN Links Using Event Rules Viewing Events You use the Event List to display information about events Viewing Events Filter dialog box By severity By event rule Do not summarizePrint Viewing Managing SelectedEvents Configuring Traffix Manager to Forward Events as Snmp Traps Configuring an Open Management Platform OMPClick Add Forwarding Events as Snmp Traps Viewing Events During a specified period Overview of Reporting Time Line for Daily Report Generation Reports Daily Reports Monthly Reports Weekly Reports Report Manager Report Manager has three main areas Managing Reports Managing Raw Data Scheduling ReportsRunning Ad Hoc Reports Managing Reports Change the lifetime of that raw report data or output Use Graphs to Identify Key Components Quickly Strategy forReporting Traffix Manager On Reports Effects of Grouping Report Types Connection Activity Report Charts Report Section Chart TitleReport Device Activity Internal Traffic flowing within the group only Group ActivityThere are three ways you can report on groups External Traffic flowing into or out of the group only Segment Activity Report Charts Unusual error totals. These baselines are calculated Received over the report period Top N Connections Top N Connections Report Charts Top N Devices Report Charts Top N Connections Report Charts Top Devices Remainder are grouped as other Device History Top N Groups Top N Groups Report Charts Segments report Percentage of errorsTop N Segments Report Charts Top N Segments Top N Segments Report Charts Utilization Appendices and Index Page Contains descriptions of problems you might encounter when Troubleshooting Traffix ManagerTroubleshooting Running Traffix Manager, and their solutions Reporting features of Traffix Manager Diagnosing Traffix Manager ProblemsReports If Browser is not in your path message is displayed Internal traffic Error could not Appendix a Troubleshooting Traffix Manager This appendix contains Traffix Control Panel Provides the following applications for managing databases DatabaseThese applications help you to manage and organize a number Network over time Database Maintenance Repair databases Clean databases Optimize databases Upgrading Traffix Manager Install\traffix\config Manager Deinstalling Traffix To deinstall Traffix Manager 2.0 for NT Appendix B Database Management Using Traffix Control Panel Default Aggregating DevicesAggregation Local Domain Specification Selecting the Default Aggregation Action Com Setting a Maximum Device Limit File can be edited and reapplied at any time Using the Subnetsdb FileUsing SubnetsDB File Class Description How Subnet Grouping Works Appendix D Using the Subnetsdb File Overview Automatic Attribute Assignment Contents User-defined Attributes Configuration File Mylookup fileattrs.exe c\my data\data.txt True Assignment Using the fileattrs ProgramPerforming Attribute True Appendix E Automatic Attribute Assignment Lookup2 Lookup2 Companies dblookup.exe c\data\companies.mdb All example programs are included Installdir\TraffixServer\examples Simple attribute lookup process in C There is one version in Visual Basic and one in C Name Language Description Example Programs FunctionDescription Library functions available GetAttribute Function Description Appendix E Automatic Attribute Assignment Types Supported RMON-2 Devices Appendix F Supported RMON-2 Devices Standalone Agents Configuring 3COMDownloading Firmware to 3Com RMON-1 Table Sizes RMON-2 Table Sizes RMON-2 AgentsPage Appendix G Configuring 3COM Standalone RMON-2 Agents Dhcp Devices Have Manager MonitorsDhcp Devices What Effect Do Chapter H Dhcp Network Segments Using RMON-1 AgentsUsing RMON-1 Monitoring Appendix I Using RMON-1 Agents Retrieval Snmp Tables used by Traffix ManagerMandatory Comments ProtoDist For protocol distribution reports only Online Technical ServicesServices Technical Support Country Data Rate Telephone Number Access by Analog ModemUsername anonymous Hours a day, 7 days a week Access by Digital Modem 847 262408 727 Country Telephone Number Asia, Pacific Rim Europe, South Africa, and Middle East Country Telephone Number Fax Number Page Glossary Glossary Glossary Glossary Glossary Tree See Object List Numbers Index 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