3Com XL PCI manual QuestionAnswer, What is a Magic Packet?

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4-18CHAPTER 4: TROUBLESHOOTING

Table 4-2Frequently Asked Questions (continued)

QuestionAnswer

What is a Magic Packet?

A Magic Packet is a valid Ethernet packet that contains a synchronization stream immediately followed by 16 repetitions of the destination MAC address. This Magic Packet is not protocol-specific as long as the protocol contains the sync stream and the 16 repetitions. This Magic Packet can be routed in order to wake up a remote PC. Since it is a valid Ethernet address, the Remote Wake-Up NIC can accept broadcast or multicast packets.

What is a cable	The NIC can also be awakened by connecting or
connect/disconnect?	disconnecting the network cable.

What is Fast IP?	Fast IP is software that improves performance on
	switched networks. Fast IP allows end systems
	(desktops and servers) to discover switched
	communication paths. By creating switched
	shortcuts, Fast IP allows end stations to bypass
	the router and transfer data across wire-speed
	switched paths. Fast IP is part of 3Com’s
	DynamicAccess software, an advanced network
	driver that brings intelligence to end systems to
	provide improved network performance and
	control.

What are the PC and network	Client requirements:
requirements to run Fast IP?	PC running Windows 95 or Windows NT
	PC running Windows 95 or Windows NT
	(versions 4 or 3.51), 3Com 3C905B-TX NIC,
	and the TCP/IP stack
	Network requirements:
	Switched path between stations and single
	broadcast domain

What are the network	Fast IP is designed to bypass the router,
configuration requirements for	particularly where the router is a bottleneck, as
Fast IP?	well as to leverage the switched infrastructure.
	For Fast IP to create shortcuts around routers,
	there must be a switched path between source
	and destination.

What is the performance gain when using Fast IP?

Fast IP bypasses the router to provide increased performance in switched networks even if only a small number of network nodes use Fast IP. The performance gain obtained when deploying Fast IP is directly related to traffic load on the backbone router. The more traffic pumped to the router, the greater the latency and response time and the higher the performance gain. Internal tests show performance increases on the order of 600% when routers are loaded at 70 to 75%.

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Contents PCI 10/100BASE-TX 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Troubleshooting Specifications Page Figures Tables About this Guide Finding Speciﬁc Information in This GuideIf you are looking for Turn to Conventions Icon DescriptionConvention Description Introduction 13C905B-TX NICDynamicAccess Software Industry-Leading PerformanceInstallation and Conﬁguration Remote Wake-up10/100 Mbps Support PC and Server RequirementsHow Do I Install the 3C905B-TX NIC? 3C905B-TX NICInstalling the NIC Secure the NIC with the screw you removed earlier 1Inserting the NICConnecting to the Network 2Connecting the Network Cable to the RJ-45 PortConnecting the Remote Wake-up Cable Reconnect all cables and replace the PC coverInstalling WindowsIf Windows prompts you to reboot, click No Network components should now include Conﬁrming Installation Click OKClick Yes Click the Device Manager tabWindows NT Windows NT VersionUpdating the Network Driver Click Update Installing the Network DriverNetwork Settings window, click Close Click CancelClick Continue Run the Install program. Enter ainstall NetWare for Windows 3.1x, Windows for Workgroups, and DOSAutoLink Requirements Running the AutoLink ProgramInstalling the Novell NetWare Server Driver NetWare VersionPress Enter to continue the server installation Multiple NICsAt the A\ prompt, enter nwserver Supported Network Drivers Network Text File Name Network Driver Name Operating SystemTroubleshooting Status LEDs3Com NIC Diagnostics Program Description Flashing Steady OffAccessing the 3C905B-TX Help System Select 3Com NIC Utilities Select 3Com NIC Diagnostics HelpSelect 3Com NIC Utilities Select 3Com NIC Diagnostics Running the NIC Self-TestEeprom Fifo Running the Echo Test On both PCs3Com Support Services 43Com NIC Diagnostics Program Support ScreenGenerating a Problem Report 5Problem Report Main Screen To exit the program, click Cancel Removing the 3C905B-TX NIC Pace and 3NICDIAGS Software Checking the Remote Wake-up FunctionWindows 95 and Windows NT Windows Control Panel, select Add/Remove Programs3Com DOS Diagnostic Program Verify the driver versionRemove the PC cover and check the Remote Wake-Up connection Crossover Cable Troubleshooting Tips Connect a straight-through cable from the PC to the hubTroubleshooting Hubs with Crossover Cable Frequently Asked Questions Question AnswerAdd/Remove Programs Question Answer What is a Magic Packet? QuestionAnswerAccessing the 3Com World Wide Web Page Changing Configuration Conﬁguration SettingsOption Default Setting Available Settings Displaying Conﬁguration Settings Changing Conﬁguration SettingsClick NIC Details to display the NIC Details screen Changing Conﬁguration Settings Changing Pace Conﬁguration Selecting Pace ApplicationsChanging Pace Ranges and Protocols Select the protocol that the application usesUsing the DOS Conﬁguration Program Setting Fast IPPace Advanced Options Specifications SpeciﬁcationsRJ-45 Connector Pin Assignments Figure A-1RJ-45 Connector Pin AssignmentsOnline Technical Services Support from Your Network Supplier3Com Bulletin Board Service Access by Analog ModemWorld Wide Web Site Country Data Rate Telephone Number3ComFacts Automated Fax Service Access by Digital Modem408 654 Country Telephone NumberPage DynamicAccess software GlossaryDRMON Full scatter gatherInﬁnite bursting Network interface card NIC10/100 auto-negotiation NWay Pace technologyIndex NumbersNIC Index Page 3Com Corporation Limited Warranty FCC Class B Statement FCC Declaration of Conformity