3Com Corporation reserves the right to revise this documentation and to make changes in
content from time to time without obligation on the part of 3Com Corporation to provide
notification of such revision or change.
3Com Corporation provides this documentation without warranty of any kind, either implied or
expressed, including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. 3Com may make improvements or changes in the product(s) and/or the
program(s) described in this documentation at any time.
UNITED STATES GOVERNMENT LEGENDS:
If you are a United States government agency, then this documentation and the software
described herein are provided to you subject to the following restricted rights:
For units of the Department of Defense:
Restricted Rights Legend: Use, duplication or disclosure by the Government is subject to restrictions
as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer
Software clause at 48 C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara,
California 95052-8145.
For civilian agencies:
Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set forth in
subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at
48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial
agreement for the software. Unpublished rights reserved under the copyright laws of the United
States.
If there is any software on removable media described in this documentation, it is furnished under
a license agreement included with the product as a separate document, in the hard copy
documentation, or on the removable media in a directory file named LICENSE.TXT. If you are
unable to locate a copy, please contact 3Com and a copy will be provided to you.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and
may or may not be registered in other countries.
3Com and LinkSwitch are registered trademarks of 3Com Corporation. 3TECH, ATMDisk, ATMLink,
the 3Com logo, and CELLplex are trademarks of 3Com Corporation. 3ComFacts is a service mark of
3Com Corporation.
CompuServe is a registered trademark of CompuServe, Inc. Microsoft, MS-DOS, Windows NT, and
Microsoft NT are registered trademarks of Microsoft Corporation. Novell and NetWare are
registered trademarks of Novell, Inc. Intel is a trademark of Intel Corporation. Other brand and
product names may be registered trademarks or trademarks of their respective holders.
Guide written by Norman Lundell. Edited by Nancy Kurahashi. Technical illustration by Mary Inden.
Production by Becky Whitmer.
L
®
IFETIME
3Com’s EtherLink®, TokenLink®, TokenLink Velocity™,
Fast EtherLink, and FDDILink
have a Lifetime Warranty.
To ensure the very best 3Com service and support, take
the time to complete the product registration card.
W
ARRANTY
™
network interface cards
Any defective 3Com adapter will be repaired or
replaced, at 3Com’s option, for as long as the adapter
resides in its original IBM® Personal Computer,
Personal System/2®, or compatible computer (driver
software is covered by the standard 90-day limited
software warranty).
Customers in the countries shown below should send the completed
registration card to the appropriate address. Customers in other non-U.S.
locations should send the registration card to the U.S. address on the front
of the card.
■
Asia
3Com Asia Ltd., Marketing Department
Room 2506-07, 25/F.
Citibank Tower
Citibank Plaza, Central
Hong Kong
■
Australia, New Zealand
3Com Australia, Marketing Department
99 Walker Street
Level 7
North Sydney
New South Wales 2060
Australia
Software Requirements 3-3
NIC Information Requirements 3-4
Resilient Server Links Overview 3-4
Rules for Using Resilient Server Links 3-4
I
NSTALLATION
NT D
Memory Requirement Scenario 1 3-3
Memory Requirement Scenario 2 3-3
RIVER
I
NSTALLATION
iii
Driver Installation Summary for Experienced Users 3-5
Before You Begin 3-5
Part One: NIC Detection, Resilient Server Links, and
ELAN Allocation 3-6
Part Two: NIC and ELAN Configuration 3-7
Installing the Network Driver 3-8
NIC Detection, Resilient Server Links, and ELAN Allocation 3-8
NIC and ELAN Configuration 3-12
Verifying Driver Installation and Configuration 3-19
Enabling and Disabling ELANs 3-20
Removing an ELAN 3-20
Adding ELANs 3-21
Adding SNMP Support 3-24
4-11 Additional Driver Actions Screen (Adding an Additional
ELAN) 4-18
4-12 Select a Driver Screen 4-19
4-13 Sample of AUTOEXEC.NCF File 4-23
5-1 ATMLink Utility Windows 5-2
5-2 ELAN Information Window 5-3
5-3 Connection Statistics Window 5-4
5-4 NIC information Window 5-5
5-5 Reset Option for Windows NT 5-7
5-6 NetWare ATM Utility Select a NIC Screen 5-8
5-7 NetWare ATMLink Utility Main Menu 5-8
5-8 NetWare NIC Information Screen 5-9
5-9VCC Statistics Screen 5-11
5-10 Currently Configured LECs Screen 5-12
5-11 LEC Statistics Screen 5-12
6-1 Diagnostic Utility Main Screen 6-4
6-2 Test Setup Screen 6-5
6-3 Run Tests Screen 6-6
6-4 External Loopback Test Screen 6-8
6-5 Run Tests Screen 6-8
6-6 Test Results Screen 6-9
6-7 NIC Statistics Screen 6-10
6-8 Test Information Screen 6-11
6-9 Sample of Diagnostic Test Report File 6-14
6-10 Unclipping the Connectors of a Double-Strand
Fiber-Optic Cable 6-17
6-11 Clipping Together the Ends of the Same Fiber Strand 6-17
6-12 UTP External Loopback Plug 6-18
viii
TABLES
1 Notice Icons 2
2 Text Conventions 2
3-1 3C975 ATMLink NIC Installation Configuration Parameters 3-13
4-1 3C975 ATMLink NIC NetWare Install Utility Configuration
Parameters 4-11
4-2 NetWare Keywords 4-24
5-1 Windows NT ELAN Information Fields 5-3
5-2 Windows NT Connection Statistics Fields 5-4
5-3 Windows NT NIC Information Fields 5-6
5-4 NetWare NIC Information Fields 5-10
5-5 NetWare VCC Statistics Screen 5-11
5-6 LEC Statistics Fields for NetWare 5-13
6-1 Accessing MS-DOS 6-3
6-2 Function Key Descriptions of the Diagnostic Utility 6-4
6-3 LED Activity 6-19
A-1 RJ-45 Connector Pinouts A-3
ix
ABOUT THIS GUIDE
Introduction
This user guide describes the installation and configuration
®
of the 3Com
network Interface cards (NICs). The intended audience is
the network administrator, network operator, or network
hardware installer. Knowledge of Asynchronous Transfer Mode
(ATM), Microsoft
operations is required.
If the information in the release notes shipped with your
product differs from the information in this guide, follow the
release notes.
How to Use This Guide
The following table shows where to find specific information
in this guide.
3C975-F and 3C975-UTP ATMLink™ 155 PCI
®
Windows NT® and Novell® NetWare® server
If you are looking for information on:Turn to:
Hardware and software overviewChapter 1
Hardware installationChapter 2
Microsoft Windows NT driver installationChapter 3
Novell NetWare driver installationChapter 4
ATMLink utilityChapter 5
ATMLink diagnostic utilityChapter 6
Hardware specificationsAppendix A
Technical supportAppendix B
2ABOUT THIS GUIDE
Conventions
Table 1 and Table 2 list text and icon conventions that are
used throughout this guide:
Table 1 Notice Icons
IconTypeDescription
Information NoteInformation notes call attention to important
CautionCautions alert you to personal safety risk, system
WarningWarnings alert you to the risk of severe personal
Table 2 Text Conventions
ConventionDescription
“Enter” vs. “Type”When the word “enter” is used in this guide, it means type
“Syntax” vs.
“Command”
(continued)
something, then press the Return or Enter key. Do not press the
Return or Enter key when an instruction simply says “type.”
When the word “syntax” is used in this guide, it indicates that the
general form of a command syntax is provided. You must
evaluate the syntax and supply the appropriate port, path, value,
address, or string; for example:
Enable RIPIP by using the following syntax:
SETDefault !<port> -RIPIP CONTrol =
Listen
In this example, you must supply a port number for !<port>.
When the word “command” is used in this guide, it indicates that
all variables in the command have been supplied and you can
enter the command as shown in text; for example:
Remove the IP address by entering the following command:
SETDefault !0 -IP NETaddr = 0.0.0.0
For consistency and clarity, the full form syntax (upper- and
lowercase letters) is provided. However, you can enter the
abbreviated form of a command by typing only the uppercase
portion and supplying the appropriate port, path, address, value,
and so forth. You can enter the command in either upper- or
lowercase letters at the prompt.
features or instructions.
damage, or loss of data.
injury.
Conventions3
Table 2 Text Conventions (continued)
ConventionDescription
Text represented as
screen
display
Text represented as
commands
KeysWhen specific keys are referredto in the text, they are called out
ItalicsItalics are used to denote new terms or emphasis.
This typeface is used to represent displays that appear
on your terminal screen, for example:
NetLogin:
This typeface is used to represent commands that you
enter, for example:
SETDefault !0 -IP NETaddr = 0.0.0.0
by their labels, such as “the Return key” or “the Escape key,” or
they may be shown as [Return] or [Esc].
If two or more keys are to be pressed simultaneously, the keys are
linked with a plus sign (+), for example:
Press [Ctrl]+[Alt]+[Del].
1
INTRODUCTION
This chapter describes the hardware and software features
of the 3Com
card (NIC), hereafter called the 3C975 ATMLink NIC.
Product Features
The 3Com ATMLink 3C975 NIC is available in two models:
the 3C975-F and the 3C975-UTP. The 3C975-F NIC has an
SC duplex fiber-optic cable connector for double-strand
62.5/125 µm multimode fiber-optic cable. The 3C975-UTP NIC
has an RJ-45 connector and requires Category 5 unshielded
twisted-pair cable. Both 3C975 ATMLink NICs are highperformance single-slot, bus master, half-length PCI cards that
provide 155.52 megabit per second (Mbps) SONET (STS-3c)
physical layer support.
The 3C975 ATMLink NICs support the following features:
®
3C975 ATMLink™ 155 PCI network interface
■ ATM Forum standard LAN Emulation Client (LEC)
■ ATM Forum AAL5 ATM adaptation layer
■ ATM Forum UNI 3.0/3.1 standard signaling for switched
virtual circuit (SVC) connections
■ Up to 4 NICs per system
■ Up to 16 emulated LANs (ELANs) per NIC
■ Up to 512 active connections per NIC
■ Up to 4,096 open and 1,024 simultaneously active virtual
channel connections per system
■ Resilient Server Link capability to protect against link failure
■ Compliance with PCI Local Bus Specification, revision 2.0
■ Link LED to indicate connection status
1-2CHAPTER 1: INTRODUCTION
■ Traffic shaping (user-defined maximum peak rate per ELAN)
■ Interim Local Management Interface (ILMI) 3.0 service
■ Simple Network Management Protocol (SNMP) agent for NICs
operating under the Windows NT
®
operating system
ATM
LINK
ATM
LINK
3C975-F
3C975-UTP
Figure 1-1 3C975-F and 3C975-UTP ATMLink NICs
Emulated LAN (ELAN) Overview1-3
Emulated LAN (ELAN) Overview
The 3Com ATMLink network driver conforms to the
ATM Forum LAN Emulation over ATM Specification 1.0 to
interoperate with legacy LAN networks. LAN emulation
supports the multicast, broadcast, and address resolution
services characteristic of shared media LANs, within the
connection-oriented ATM environment. Four devices are
defined to provide these LAN emulation services:
■ LAN Emulation Client (LEC) found on all end stations
■ LAN Emulation Configuration Server (LECS)
■ LAN Emulation Server (LES)
■ Broadcast and Unknown Server (BUS)
The 3C975 ATMLink NIC network driver provides the LAN
Emulation Client and supports up to 16 LECs per NIC. Each LEC
configured on an ATMLink NIC is regarded by the network
operating system as a separate (emulated) NIC and receives a
unique MAC address. An “emulated” NIC connects to an
emulated LAN (ELAN). In short, each physical ATMLink NIC can
connect to up to 16 separate ELANs.
The term ELAN is often used to denote an LEC in the 3Com
ATMLink utilities, installation programs, and user guide.
An ELAN is a logical grouping of end stations within an ATM
network. The ATM network administrator creates ELANs when
configuring the ATM switches. Membership in an ELAN is
independent of the physical location of the end station within
the ATM network. An end station can belong to multiple
ELANs simultaneously. Mixed-media edge devices (such as the
®
3Com LinkSwitch
2700 switch) that are connected to ATM
switches enable ATM end stations to interoperate with legacy
LAN end stations, because the legacy LAN end station and the
ATM end station can be members of the same ELAN. This
guide includes configuration procedures that allow an LEC to
join an ELAN.
1-4CHAPTER 1: INTRODUCTION
For more detailed information on LAN emulation and
emulated LANs, access the Networking Solutions Center on
the 3Com World Wide Web site at www.3com.com. White
papers on ATM are found in the Advanced Technology
Solutions section.
Software Descriptions
The following software is contained on the ATMDisk™ diskettes
shipped with the 3C975 ATMLink NIC.
■ Network driver for Microsoft
and 4.0
■ Network driver and NetWare
®
NetWare server, versions 4.x and 3.12
Novell
■ ATMLink diagnostic utility (DOS version)
■ ATMLink utility (Windows NT and NetWare versions)
Network drivers and utility programs are periodically updated
and made available through 3Com online services. See
Appendix B for details on how to use 3Com online services.
®
Windows NT, versions 3.51
®
Loadable Modules (NLMs) for
Network Driver Description
3Com ATMLink network drivers support the following
features:
■ Simultaneous operation of up to four physical NICs per system
■ ATM Forum LEC, version 1.0 for token ring and Ethernet LANs
■ ATM Forum UNI 3.0 and 3.1 signaling
■ 16 ELANs per NIC
■ ILMI 3.0 services
■ Resilient server links (RSL)
■ Traffic shaping
■ SNMP agent for NICs operating under Windows NT
Software Descriptions1-5
The NetWare 4.x and 3.12 drivers and Windows NT network
drivers support up to four physical NICs per system.
Each physical NIC can be configured to support up to 16 LECs.
Each LEC operates as a virtual NIC and has a unique MAC
address.
Only one LEC per NIC is supported in NetWare 3.12.
The ATMLink NIC network driver uses switched virtual circuits
(SVCs) to establish network connections with up to 4,096
open virtual channel connections (VCCs) supported per
system. Each LEC requires a minimum of four VCCs in addition
to those needed for its data requirements. These four VCCs are
used by the LAN Emulation Server (LES) and the Broadcast
and Unknown Server (BUS).
Resilient server links allow the network administrator to
designate up to three of the installed 3C975 ATMLink NICs as
standby NICs. In the event of link failure, the standby NIC
assumes the configuration profile and network traffic of a
failed active ATMLink NIC. Resilient server links are discussed
in Chapter 3 and Chapter 4.
The ATMLink network drivers let the ATM network
administrator set a maximum peak cell rate value for each
LEC. This form of bandwidth allocation is useful in mitigating
congestion and ensuring optimum usage of bandwidth.
Diagnostic Utility Description
The ATMLink diagnostic utility is a DOS program that tests the
internal integrity of the 3C975 ATMLink NIC and its ability to
send and receive packets. The diagnostic utility also identifies
the MAC address, the PCI slot number, and manufacturer’s
information for each installed 3Com ATMLink NIC. It is
recommended that you run the diagnostic utility after
installing the ATMLink NIC and before installing the network
drivers. For information on how to use the diagnostic utility,
see Chapter 6, “Diagnostics and Troubleshooting.”
1-6CHAPTER 1: INTRODUCTION
ATMLink Utility Description
An ATMLink utility for Microsoft Windows NT and for
Novell NetWare is shipped on the ATMDisk diskettes. Use the
ATMLink utility to display configuration and operating status
of all installed ATMLink NICs and ELANs, as well as to reset a
NIC. Chapter 5 describes how to use the ATMLink utility.
2
HARDWARE INSTALLATION
This chapter describes the procedure for installing the
3C975 ATMLink NIC in your PCI-bus computer system. Follow
all applicable instructions included with your system
documentation on PCI-bus installations.
Installation Overview
Hardware installation consists of the following major steps:
■ Unpacking the 3C975 ATMLink NIC
■ Installing the 3C975 ATMLink NIC in an available PCI slot
■ Connecting the appropriate cables
Please observe all special notes and precautions.
For technical specifications on the 3C975 ATMLink NIC, see
Appendix A.
Installing the 3C975 ATMLink NIC
To install the 3C975 ATMLink NIC in your computer, perform
these steps.
Keep the 3C975 ATMLink NIC in the protective antistatic bag
until you are ready to install it. To prevent damage to the NIC
due to electrostatic discharge, wear a grounding strap and
handle the NIC by its edges only. If you do not have a
grounding strap, touch the chassis or the power supply just
before handling the NIC. Do not touch the components or
any metal parts on the NIC, except for the backplate.
1 Unpack and inspect the 3C975 ATMLink NIC for damage.
2 Exit all open applications and user processes.
2-2CHAPTER 2: HARDWARE INSTALLATION
3 Turn off the power to the computer system and any
attached devices.
4 Unplug the power cables from the power supply.
WARNING: Your computer operates with voltages that can be
lethal. Before you remove the computer cover, carefully review
the steps in this procedure and observe all cautions and
warnings to protect yourself and to prevent damage to the
computer.
5 Remove the cover from your computer.
6 Locate an empty bus master PCI-bus expansion slot.
7 Remove the metal expansion slot cover from the
computer chassis, as shown in Figure 2-1.
Save the screw for step 11 later in this section.
Mounting
screw
Expansion
slot cover
Expansion
slots
Figure 2-1 Removing the Expansion Slot Cover
32-bit PCI
slots
Installing the 3C975 ATMLink NIC2-3
8 Insert the 3C975 ATMLink NIC in the selected slot, as
shown in Figure 2-2.
Figure 2-2 3C975-F ATMLink NIC Installed in the Chassis
9 Write down the MAC address of the NIC and note which
slot you used.
This information is helpful when installing the network
drivers and connecting the cables to the ATM switch.
The MAC address is the 12-digit hexadecimal number printed
on the small bar code label on the component side of the NIC.
10 Press down gently and firmly on the NIC to seat it properly.
11 Use the screw removed in step 7 to secure the
3C975 ATMLink NIC bracket to the system chassis.
12 Replace the system cover.
2-4CHAPTER 2: HARDWARE INSTALLATION
13 Connect the power cables and turn on the power to the
computer.
14 Connect the 3C975 ATMLink NIC to the network.
The 3C975-F NIC uses 62.5/125 µm multimode fiber-optic
cable with SC duplex connectors. The 3C975-UTP NIC uses
Category 5 unshielded twisted-pair cable with an RJ-45
connector. Both models are shown in Figure 2-3.
The physical installation of the ATMLink NIC is now complete.
ATM
SC connector
port
LINK
Figure 2-3 SC Duplex and RJ-45 Connectors
LED
ATM
LINK
RJ-45
port
LED
It is strongly recommended that you run the ATMLink
diagnostic utility before attempting to install the network
drivers. The diagnostic utility verifies that the on-board
components of each NIC function correctly. This utility also
correlates the MAC address of the NIC with its PCI slot number.
You must know the PCI slot number to load, configure, or
reconfigure the Microsoft Windows NT network drivers.
The next step is to install the network software driver. For
server driver installation procedures, refer to Chapter 3 for
Windows NT, or to Chapter 4 for Novell NetWare.
3
WINDOWS NT DRIVER
INSTALLATION
The 3C975 ATMLink NIC driver for file servers running
Windows NT provides standards-based ATM LAN emulation
connectivity to an ATM network. This permits legacy LAN
networking technologies and protocols (such as Ethernet
and token ring) to run over an ATM network.
This chapter includes procedures to install and remove the
3C975 ATMLink Windows NT network driver, as well as
information about ELAN configuration and resilient links.
A basic knowledge of Windows NT server operations and
ATM concepts is required.
The term ELAN is often used to denote an LEC in the graphical
user interface and in the following procedures.
Driver Installation Overview
The Windows NT driver installation program consists of two
parts:
■ NIC detection, creation of resilient server links, and ELAN
allocation
■ NIC and ELAN configuration
During NIC detection the user designates each detected 3Com
3C975 ATMLink NIC as either an active or a standby NIC (see the
section “Resilient Server Links Overview” later in this chapter)
and specifies the number of ELANs supported by each active
NIC. In the NIC/ELAN configuration portion of the driver
installation, the user sets the ATM parameters for all active NICs
and ELANs as well as configuration information for standby NICs.
There can be up to four 3Com 3C975 ATMLink NICs installed
in a single computer system, with each NIC supporting up to
16 ELANs.
3-2CHAPTER 3: WINDOWS NT DRIVER INSTALLATION
Driver Installation Requirements
Please confirm that the following requirements are met before
you install and configure the 3Com ATMLink NIC Windows NT
network driver.
Hardware Requirements
■ Computer with Intel®-based CPU and bus master PCI bus,
running Microsoft Windows NT version 3.51 or 4.x
■ 3.5-inch floppy disk drive
■ At least one 3Com ATMLink NIC installed in the system
Memory Requirements
Use the following formula to determine the Windows NT
memory requirements in megabytes of RAM:
(16 x Frame_Size) + [(No. of NICs –1) x (No. of ELANS)]
where:
Frame_size = 1 When the maximum frame size is 1514 bytes
Frame_size = 2 When the maximum frame size is 4542 bytes
Frame_size = 4 When the maximum frame size is 9232 bytes
No. of NICs =The number of ATMLink NICs installed in the
computer
No. of ELANs = The number of ELANs on the NIC with the
most ELANs
When NICs with different maximum frame sizes are installed in
the same computer, use the larger Frame_Size value.
Round up the result to the first integral multiple of 8.
Most Ethernet ELANs use a maximum frame size of 1514 bytes.
Token ring ELANs typically use a maximum frame size of 4542
or 9232 bytes. See Table 3-1 for more information on the
Maximum Frame Size configuration parameter.
Driver Installation Requirements3-3
Memory Requirement Scenario 1
There are two NICs installed. One has a maximum frame size
of 1514 bytes and four ELANs, and the other is a standby NIC.
The memory requirement is 24 megabytes of RAM.
Frame_Size = 1 (1514 bytes maximum frame size)
No. of NICs = 2 (two NICs are installed in the computer)
No. of ELANs = 4 (only one NIC has ELANs configured)
(16 × 1) + [(2 – 1) × (4)] = 20
The closest integral multiple of 8 greater than 20 is 24.
Memory Requirement Scenario 2
There are three NICs installed. One is a token ring LAN type
with a maximum frame size of 4542 and four ELANs, one is a
token ring LAN type with a maximum frame size of 9232 and
two ELANs, and one is an Ethernet LAN type with a maximum
frame size of 1514 and six ELANs. The memory requirement is
80 megabytes of RAM.
Frame_Size = 4 (use the largest value of all present)
No. of NICs = 3 (three NICs are installed in the computer)
No. of ELANs = 6 (the maximum number of ELANs on any one NIC)
(16 × 4) + [(3 – 1) × (6)] = 76
The closest integral multiple of 8 greater than 76 is 80.
Software Requirements
■ ATMDisk diskette for Windows NT
3Com strongly recommends that your Windows NT operating
system be updated with the most recent service packs available
from Microsoft technical support (www.microsoft.com).
3-4CHAPTER 3: WINDOWS NT DRIVER INSTALLATION
NIC Information Requirements
■ Names of the ELANs to be configured on each ATMLink NIC
■ IP address and subnet mask of each ELAN using TCP/IP if a
DHCP server is not being used
■ ATM address of the LES or LECS (other than the ATM Forum
Well-known Address) if ILMI services are not used
■ PCI slot number of each installed ATMLink NIC
The MAC address and PCI slot numbers of installed 3Com
ATMLink NICs are used in the Windows NT driver installation.
They can be obtained by using the diagnostic utility (see
Chapter 6 for details).
Resilient Server Links Overview
Resilient server links add redundant function to your server
to protect against network disruption and data loss.
To use resilient links, you must install two or more 3Com
ATMLink NICs in your system. During the network driver
configuration procedure, at least one NIC must be designated
an active NIC. The standby NIC takes over when the link on a
designated active NIC port is lost.
Rules for Using Resilient Server Links
■ Resilient server links are established only among ATMLink NICs
installed in the same computer.
■ To make a resilient server link, at least two ATMLink NICs must
be installed in the same computer, and one of the NICs must
be an active NIC.
■ Active NICs and their standby NICs must be connected to
switches on the same ATM network.
■ Up to three standby NICs can be assigned to a single active NIC.
■ A single standby NIC can be assigned to as many as three
active NICs.
Driver Installation Summary for Experienced Users3-5
■ In a two-NIC scenario, when NIC 1 is active and NIC 2 is standby,
and if the link on the NIC 1 port fails, NIC 2 assumes the
configuration profile of NIC 1 and becomes the active NIC.
NIC 1 now becomes a standby NIC for NIC 2.
■ When a standby NIC assigned to multiple active NICs becomes
active, it can no longer be a standby NIC for its other designated
active NICs.
■ When an active NIC with multiple standby NICs fails, the first
eligible standby NIC (in driver load order) assumes the
configuration profile of the active NIC. If this NIC in turn fails,
the next designated standby NIC (in driver load order) takes
over, and so on.
■ A NIC cannot be configured as a standby NIC for another
standby NIC.
■ A resilient server link is established only if the active NIC is
operational after Windows NT is booted.
The standby NIC cannot assume the configuration profile of
an active NIC that has never been operational.
Driver Installation Summary for Experienced Users
Experienced Windows NT users knowledgeable in ATM
configuration can use the following summary to install the
3C975 ATMLink network driver for Windows NT. Other users
should proceed to the section “Installing the Network Driver”
later in this chapter.
Before You Begin
■ Verify that all system and memory requirements are met.
■ When multiple ATMLink NICs are installed, run the
ATMLink diagnostic utility.
Write down the MAC address, the bus number, and the slot
number of each installed ATMLink NIC. See Chapter 6 for
information on the ATMLink diagnostic utility.
3-6CHAPTER 3: WINDOWS NT DRIVER INSTALLATION
■ Obtain the names of the ELANs you wish to join from your
ATM system administrator.
■ Obtain an IP address for each ELAN you intend to install, if the
ELANs are to be used on an IP network without a DHCP server.
Part One: NIC Detection, Resilient Server Links, and
ELAN Allocation
1 From the Network Settings window in the Control Panel,
click Add Adapter and copy the 3C975 NIC driver from the
3Com ATMDisk diskette.
The NIC Installation dialog box appears, identifying the first
3Com ATMLink NIC found on the PCI bus.
2 Click Yes to install the ATMLink NIC network driver on the
identified NIC, or click No to bypass the NIC.
You may wish to bypass a previously installed NIC in the system.
The NIC Mode dialog box appears.
3 Make the identified NIC an active or a standby NIC.
■ If you select Stand-by, the NIC Installation dialog box
reappears when there are multiple NICs installed.
■ If you select Active, theTotal Number of ELANs dialog box
appears.
4 Enter the number of ELANs to be supported by the
identified NIC.
If more than one 3Com ATMLink NIC is installed, the
installation program returns to step 2 and the NIC Installation
dialog box.
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