Disable Switch Packet Prioritization

B-4APPENDIX B: ADVANCED PACE FEATURES

This option disables modiﬁcation of Ethernet packets used for prioritization of multimedia trafﬁc within 3Com switch products. For example, disabling switch packet prioritization can sometimes alleviate the failure to make a multimedia connection between a PACE-enabled workstation and a non-PACE workstation.

Disabling switch packet prioritization only affects the switch. It does not change the behavior of the PACE driver in any way. High-priority packets are transmitted ahead of most non-PACE packets on the workstation.

Disable Receive Packet Buffering

This option disables the receive packet buffer.

Page 88

Image 88

PictureTel III ISA manual Disable Switch Packet Prioritization, Disable Receive Packet Buffering

Contents

EtherLink III ISA Network Interface Card User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Lifetime Limited Warranty Sweden, Finland, Norway Contents To Conﬁgure Dynamic Access Software To Not Save Installation SettingsRunning the AutoLink Install Program To Obtain an IP Address Automatically NIC Test Network Test Uninstalling the NIC Performing Automated InstallationsInstalling from a Diskette Checklist Troubleshooting Hubs with Crossover Cable C-1 Disable Receive Packet BufferingLow-Priority Ratio Natural Packet Interval Select Device Screen Update Device Driver Wizard ScreenDNS Conﬁguration Screen Save Installation Settings Screen Option Settings Diagnostic ProgramsTables Parameters for 3C509B NIC ModelsPage About this Guide How to Use This GuideIf you are looking for Turn to Conventions List conventions that are used throughout this guideIcon Alerts you to Convention Description Network Interface Card Installation Network Interface Card Overview NIC Model Cable Connector Transceiver Network Segment Before You Begin3Com 3C509B EtherDisk diskettes 1 Maximum Installing the NIC 2Installing the 3C509B NIC Connecting to the Network Go to Link LED later in this chapter 4Connecting to the BNC Port on the 3C509B-TPC NIC If the NIC LED indicates a problem, check the following Link LEDGo to the next section Describes the LED statesPage Selecting the Type of Installation Setup for Custom InstallationExpress Installation Windows 95 Setup Custom InstallationFuture installations Multiple NIC Installations Windows 95 Setup 3Com Installation Wizard Follow these steps to perform the preinstallation procedure Performing the Preinstallation ProcedureClick OK Turn the power on and boot Windows Conﬁguring the NIC in a Plug and Play PC Insert EtherDisk diskette 1 in drive a Click Next 3Com Installation Wizard starts. Go to ChapterClick Finish Plug and Play is disabled on the NIC Disabling Plug and Play on the NICDOS Pnpdsabl screen appears, as shown in Figure Next step is to conﬁgure the NIC Add New Hardware Wizard starts and displays the ﬁrst screen Conﬁguring the NICSelect No, and then click Next 8Install from Disk Screen Windows NT Setup 10I/O Range Assigned to the NIC Screen Windows NT Setup Network screen appears Select OEM Option screen appears Custom Installation Follow these steps to perform a Custom installation To Accept Conﬁguration Settings Conﬁguring the NIC Testing the NIC and the Network Connection To Modify Conﬁguration Settings Follow these steps to test the NIC Message conﬁrms that the NIC is functioning correctlyNetwork Connection Test screen appears, as shown in Figure Follow these steps to test the network connection Installing TCP/IP Under Windows To Not Install TCP/IPTo Install TCP/IP Select the No radio button Click Next Conﬁguring TCP/IP Under Windows To Obtain an IP Address AutomaticallyFollow these steps to obtain an IP address automatically Go to Conﬁguring DNS later in this chapter To Specify an IP Address Manually Click Add New Gateway to add the new gateway conﬁguration Conﬁguring DNS To Obtain a DNS Address AutomaticallyFollow these steps to obtain a DNS address automatically Message conﬁrms that the DNS connection is functioning To Specify a DNS Address Manually Follow these steps to specify a DNS address manuallyNew server appears in the Servers list box Next step is to identify your PC on the network Next step is to conﬁgure DynamicAccess software Identifying Your PC on the NetworkFollow these steps to enter ﬁeld data Type the name of your computer Conﬁguring DynamicAccess Software To Not Conﬁgure DynamicAccess Software Pace Support Setup screen appears, as shown in Figure To Conﬁgure DynamicAccess SoftwareDouble-click the 3Com Pace Conﬁg icon shown in Figure Repeating a Previous Installation To Not Save Installation Settings To Save Installation Settings Select the Yes radio button, and then click Next Installation Complete screen appears, as shown in Figure Click Finish Windows Completing the Installation and ConﬁgurationClick Yes Windows NT Click Close Choose a method to conﬁgure TCP/IP 19Microsoft TCP/IP Properties Screen Select the Specify an IP address radio button Page Configuration Running the AutoLink Install ProgramUnder Windows AutoLink Requirements AutoLink program menu is displayed I N N U Installing Other Supported Network Drivers Obtaining NetWare Loadable ModulesNetWare Server NLM Name Network Text File Name Network Driver Name Operating System Removing NIC Software NIC software is removed from your PCSelect Conﬁgure NIC and press Enter NIC Conﬁguration screen is displayed, as shown in Figure Reconﬁguring the NIC Select Auto Conﬁgure and press Enter Changing NIC Conﬁguration from ISA to Eisa Follow these steps to conﬁgure the 3C509B ISA NIC for an Changing NIC Conﬁguration from Eisa to ISA Changing Conﬁguration Settings Option Default Setting Supported Settings Follow these steps to change the conﬁguration settings Page Checklist Windows 95 Windows NT TroubleshootingResolving Hardware Conﬂicts in Windows 95 and Windows NT System Properties window is displayed Close all open windows and restart the PC Double-click the 3Com icon in the taskbar tray General tab of the 3Com NIC Diagnostics program appearsRestart the PC Installing Multiple NICs in a Windows NT PC Installing the First NICSetup program copies ﬁles, and the Network screen reappears 3Com EtherLink III 3C509 ISA Adapter Bus screen appears Installing Subsequent NICs Setup program displays a warning messageMicrosoft TCP/IP Properties screen appears Files are copied, and the Network screen reappears Windows 95 and Windows NT Troubleshooting Diagnostic Testing Under Windows 95 and Windows NTStarting the 3Com NIC Diagnostics Program Messages are displayed, and you are prompted to reboot Diagnostics DynamicAccessTab Description General Conﬁguration Uninstalling the NIC Running Tests Reinstalling NIC Software Click Remove Click OK Performing Automated Installations Installing from the Hard DiskInstalling from a Diskette Click Install Windows Troubleshooting Diagnostic Testing Under Windows Starting the DOS Conﬁguration and Diagnostic Program If multiple NICs are installed, each NIC is listedRunning the Group 1 Tests Select the NIC you want to test and press Enter Failure in this test usually indicates a cabling problem Running the Group 2 TestFollow these steps to run the Group 1 tests Assembling a Loopback Plug Setting Up an Echo Server Follow these steps to set up an echo serverRunning the Group 3 Test Starting the Group 2 Test Diagnostic NIC Installed Program Name Echo Server Main window of the diagnostic program is displayedStarting the Group 3 Test Getting Help If a Test Fails Specifications NIC Speciﬁcations AUI Connector Pin Assignments RJ-45 Connector Pin AssignmentsPin Function Cable Speciﬁcations TypeExamplePage Additional Ranges Tab Additional Ranges tab is shown in Figure B-1 Advanced Options Tab Click Add Fifo Packet Threshold Concurrent UDP StreamsLow-Priority Ratio Natural Packet Interval Disable Receive Packet Buffering Disable Switch Packet PrioritizationThis option disables the receive packet buffer Troubleshooting Hubs with Crossover Cable Crossover Cable To make a crossover cable, connect TD+ to RD+ and TD- to RD Figure C-1Straight-Through and Crossover Cable Pinouts 3Com Bulletin Board Service Online Technical ServicesWorld Wide Web Site 3ComFacts Automated Fax Service Access by Analog ModemAccess by Digital Modem 408 654 3ComForum on CompuServe Online Service Support from Your Network SupplierTo use 3ComForum Log on to CompuServe Support from 3Com Regional Sales Office Telephone Number 3Com Corporation 3Com Ireland To obtain an RMA number, call or fax Returning Products for RepairCountry Telephone Number Fax Number Index Numbers Index NIC Page 3Com Corporation Limited Warranty FCC Class B Statement FCC Declaration of Conformity Page Page Page Page Page