3Com XLPCI manual Operational Settings, Fifo Packet Threshold, Concurrent UDP Streams

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B	CONFIGURING ADVANCED
	PACE OPTIONS

This appendix describes how to use advanced PACE options to conﬁgure operational settings and additional ranges and protocols of applications for which you have enabled PACE support.

Advanced PACE options allow you to change ranges, add protocols, and deﬁne operational settings that regulate network trafﬁc for PACE-supported applications running on your PC. When you install a new application on your PC that you want to have supported by PACE, use the advanced PACE options to conﬁgure the new application for PACE support. Refer to the user guide that came with the PACE-supported application for speciﬁc range and protocol information.

Operational Settings

The following operational settings can be modiﬁed to regulate PACE trafﬁc on the network.

FIFO Packet Threshold

This setting controls the number of non-PACE packets that the network driver allows in the FIFO buffer, ahead of PACE packets. A smaller number decreases the time between PACE packets, but it can also decrease performance. The recommended setting is 3.

Concurrent UDP Streams

This setting controls the number of simultaneous multimedia UDP packet streams that the network driver can handle at any given time. For many applications, the number of UDP streams is the same as the number of connections.

For example, a videoconference with three people at three different sites uses three concurrent UDP streams for the video data. The concurrent UDP streams setting must be a power of 2 (2, 4, 8, 16, and so forth), but the optimal setting varies depending on your PC and the application that you are running.

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Contents EtherLink XL PCI 10 Mbps Network Interface Cards User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Changing Configuration Settings Troubleshooting Network Connection Problems Page Figures Tables About this Guide Finding Speciﬁc Information in This GuideIf you are looking for Turn to Icon Description ConventionsConvention Description Bold-face typeNetwork Interface Card InstallingPreparing for Installation NIC Model Cable Connector Transceiver Network SegmentMaximum Inserting the NIC 2Installing the 3C900B NIC RJ-45 Port Connecting to the NetworkBNC Port 4Connecting to the BNC Port on the 3C900B-COMBO NICAUI Port 5Connecting to the AUI Port on the 3C900B-COMBO NICMeaning RJ-45 Interpreting the Link LEDState OffWindows Network DriverSpeciﬁed ﬁelds of the Identiﬁcation tab screen, enter Windows 95 BuildEnter your user name and password, and then click OK Click CloseClick Yes Windows 95 OSR2 Insert EtherDisk diskette 2 in drive a and click NextClick Finish Windows 95 prompts you to reboot Windows NT Conﬁrming InstallationWindows NT Click the Adapters tabClick Add 8CHAPTER 2 Installing the Network Driver Click Add Adapter Click Close Click OK in the Network Settings windowRunning AutoLink Software Novell NetWare Client DriverNetWare Novell NetWare Server DriverSave and exit the ﬁle, and then reboot the server NetWare 4.10Multiple NICs 3c90xcfg.exe Network Text File Name Network Driver Name Operating System Supported Network DriversRunning Diagnostic Programs Troubleshooting3Com NIC Diagnostics Program 3Com DOS Diagnostic ProgramRunning NIC Tests Double-click the 3Com icon in the Windows system tray13Com NIC Diagnostics General Screen Click the Diagnostics tabRunning the Echo Test Click StartOn both PCs On the responding PCOn the sending PC Close all open windows when the Echo test is ﬁnished 63Com NIC Diagnostics Support Screen 3Com Support ServicesClick the Support tab Accessing the Help SystemWindows 95 and Windows NT Removing NIC SoftwareQuestionAnswer Frequently Asked QuestionsQuestion Answer Make sure that your IP protocol does not compute the CRC Fast IP is designed to bypass the router, particularly where Page Option Default Setting Available Settings Changing Configuration SettingsUsing the DOS Conﬁguration Program Running the 3Com NIC Diagnostics ProgramDisplaying Conﬁguration Settings Running the 3Com NIC Diagnostics Program 33Com NIC Diagnostics Properties Screen Changing Conﬁguration SettingsEnabling Pace Support 43Com DynamicAccess Setup ScreenPage Specifications SpeciﬁcationsCabling Requirements Twisted-Pair Cable 10BASE-T OperationCategory Use 10BASE-T Speciﬁcations RJ-45 Connector Pin AssignmentsPage Operational Settings Fifo Packet ThresholdConcurrent UDP Streams Option Descriptions Disable Switch Packet PrioritizationLow-Priority Ratio Natural Packet IntervalDisable Receive Packet Buffering Changing Operational SettingsChanging Ranges and Protocols Troubleshooting Network Connection Problems Eliminating Potential Causes of ProblemsConnect a straight-through cable from the PC to the hub Crossover cable Troubleshooting Hubs with Crossover CableSupport from Your Network Supplier Online Technical Services3Com Bulletin Board Service Access by Analog ModemWorld Wide Web Site Access by Digital Modem 3ComFacts Automated Fax Service408 654 408 727Page Numbers IndexLANSRV.TXT 10BASE-TA-3 Page 3Com Corporation Limited Warranty FCC Class B Statement FCC Declaration of Conformity