3Com Switch 2000 TR User Manual

SUPERSTACK II SWITCH 2000 TR  
TOKEN RING-IN-FAST ETHERNET MODULE  
®
For SuperStack II Switch 2000 TR  
Part No. 99045  
Published October 1997  
 
Installation 3-2  
ABOUT THIS GUIDE  
Post-Installation Checks 3-3  
LED Summary 3-3  
Introduction  
Terminology  
1
1
Checking the Power Supply 3-4  
Finding Information in this Guide  
2
Checking that the TR-in-FE Module is Installed  
Correctly 3-5  
Conventions  
2
Checking the Physical Connections 3-5  
Jumper Settings 3-6  
1
2
OVERVIEW  
TR-in-FE Module 1-1  
4
ACCESSING MANAGEMENT FEATURES  
The VT100 Console 4-1  
Choice Field 4-1  
TR-in-FE Benefits 1-2  
Summary of TR-in-FE Module Features 1-3  
Hardware 1-3  
Entry Field 4-1  
Software 1-3  
Button 4-2  
List Boxes 4-2  
Key Board Shortcuts 4-2  
Correcting Text Entries 4-2  
Default Users 4-3  
The LCD Console 4-5  
Logging On 4-6  
TR-IN-FE CONCEPTS  
What is Token Ring-in-Fast Ethernet (TR-in-FE)? 2-1  
TR-in-FE Compared to Traditional Methods 2-2  
Token Ring-in-Fast Ethernet Module 2-2  
How TR-in-FE Works 2-3  
Logging Off 4-7  
Tunneling 2-5  
Automatic Logout 4-7  
Requirements 2-5  
Token Ring Frames 2-5  
5
CONFIGURING THE TR-IN-FE MODULE  
Virtual LANs (VLANS) 2-7  
What is a VLAN 2-7  
TR-in-FE Module Configuration Map 5-1  
Setting Up a Module 5-2  
Bridge Parameters 5-3  
Advantages of VLAN 2-7  
Port-Based Distribution 2-7  
Spanning Tree 5-3  
Source Routing 5-4  
3
INSTALLING AND SETTING UP THE MODULE  
Following Safety Information 3-1  
Pre-installation Procedure 3-1  
Setting Up a VLAN 5-5  
TR VLAN Info Setup Screen 5-5  
 
TR VLAN Setup Screen 5-5  
Returning Products for Repair D-3  
6
MONITORING THE TR-IN-FE MODULE  
TR-in-FE Module Statistics Map 6-1  
Statistics Overview 6-2  
3COM CORPORATION LIMITED WARRANTY  
Port Statistics (Traffic) 6-3  
Clearing Screen Counters 6-4  
A
SAFETY INFORMATION  
Important Safety Information A-1  
Linformation de Sécurité Importante A-1  
Wichtige Sicherheitsinformationen A-2  
B
C
SCREEN ACCESS RIGHTS  
TR-IN-FE MODULE TECHNICAL SPECIFICATIONS  
Environmental Specifications C-1  
Does the Cable Provide Sufficient Bandwidth? C-2  
Example C-2  
D
TECHNICAL SUPPORT  
Online Technical Services D-1  
3Com Bulletin Board Service D-1  
Access by Modem D-1  
Access by ISDN D-1  
World Wide Web Site D-1  
3ComForum on CompuServe D-2  
3ComFacts Automated Fax Service D-2  
Support from Your Network Supplier D-2  
Support from 3Com D-3  
 
ABOUT THIS GUIDE  
Introduction  
Terminology  
This guide provides the information needed to install  
and configure the SuperStack II Switch 2000 TR  
Token Ring-in-Fast Ethernet (TR-in-FE) Module. For  
more information about the switch itself, see the  
SuperStack II Switch 2000 TR User Guide.  
In this manual the term TR-in-FE Module is used  
when referring to the SuperStack II Switch 2000 TR  
Token Ring-in-Fast Ethernet Module.  
The device into which the TR-in-FE Module is fitted,  
is known simply as the Switch. An example of a  
Switch is 3Coms SuperStack II Switch 2000 TR. This  
type of switch is often referred to as an  
The SuperStack II Switch 2000 TR Token Ring-in-Fast  
Ethernet Module Guide is intended for use by net-  
work administrators responsible for installing and  
setting up networking equipment. It assumes a basic  
working knowledge of Local Area Networks, Token  
Ring Networks, and Ethernet. Basic TR-in-FE con-  
cepts are explained within this guide.  
edge-device, edge-switch or boundary switch.  
Name used in guide:  
Includes:  
Switch 2000 TR  
SuperStack II Switch 2000 TR  
The Release Notes shipped with the TR-in-FE Module  
may contain information that updates or overrides  
information in this guide. You should always follow  
the information in the Release Notes if it is differ-  
ent from the information given in this guide.  
 
     
2
CHAPTER : ABOUT THIS GUIDE  
Finding Information in this Guide  
Conventions  
The following table shows you where to find spe-  
cific information within this guide.  
Table 1 and Table 2 list icon and text conventions  
that are used throughout this guide.  
Table 1 Notice Icons  
Task  
Location  
Icon  
Type  
Description  
Learning features, Chapter 1, “Overview”  
benefits, and con- Chapter 2, “TR-in-FE Concepts”  
cepts  
Information  
Note  
Important features or instructions.  
Caution  
damage, or loss of data.  
Planning your net- Chapter 1, “Overview”  
work  
Chapter 2, “TR-in-FE Concepts”  
Chapter 3, “Installing And Setting Up The Mod-  
ule”  
Warning  
Risk of severe personal injury.  
Appendix C, “TR-in-FE Module Technical Specifi-  
cations”  
Table 2 Text Conventions  
Convention Description  
Installing the  
Chapter 3, “Installing And Setting Up The Mod-  
ule”  
TR-in-FE Module  
Chapter 5, “Configuring The TR-in-FE Module”  
Appendix A, “Safety Information”  
Screen  
display  
This typeface is used to represent information as it  
appears on the screen.  
Accessing screens  
Chapter 4, “Accessing Management Features”  
Appendix B, “Screen Access Rights”  
The words  
“Enter” and  
Type”  
The word “enter” means type something and then  
press the Return or Enter key. Do not press the  
Return or Enter key when an instruction simply says  
“type.”  
Monitoring  
the Module  
Chapter 6, “Monitoring The TR-in-FE Module”  
[Key] names  
Key names appear in text in one of two ways:  
Getting Technical  
Support  
Appendix D, “Technical Support”  
Referred to by their labels, such as “the Return  
key” or “the Escape key”.  
Enclosed within brackets, such as [Return] or [Esc].  
If you must press two or more keys simultaneously,  
the key names are linked with a plus sign (+). For  
example:  
Press [Ctrl]+[Alt]+[Del].  
Words in  
Bold text denotes key features.  
bold  
 
             
OVERVIEW  
1
This chapter describes the major features and benefits  
of the SuperStack II Switch 2000 TR TR-in-FE Module,  
including:  
About the SuperStack II Switch 2000 TR  
TR-in-FE Module  
The SuperStack II Switch 2000 TR TR-in-FE module  
combines Token Ring and Fast Ethernet (FE) for the  
purpose of utilizing FE as a backbone and method of  
high-speed server attachment for TR networks.  
TR-in-FE complements ATM and FDDI methods of  
high-speed integration by providing an option to help  
TR users evolve their networks core infrastructure  
while preserving their existing equipment and appli-  
cations.  
About the SuperStack II Switch 2000 TR TR-in-FE  
Module  
TR-in-FE Benefits  
Summary of TR-in-FE Module Features  
TR-in-FE uses Fast Ethernet to transport natively for-  
matted Token Ring frames. Both source route and  
transparent TR frame addressing information is main-  
tained through the FE infrastructure. This allows stan-  
dard TR workstations and servers to use the fast  
transport without modification, or special FE servers  
to communicate to the native TR community.  
 
         
1-2  
CHAPTER 1: OVERVIEW  
performance. TR-in-FE accomplishes this by introduc-  
ing routing or Source-Route to Transparent transla-  
tional bridging.  
TR-in-FE Benefits  
Increasingly, Token Ring users are deploying switches  
to segment their networks and to increase available  
bandwidth to their workgroups. This has resulted in a  
demand for more server bandwidth as well as  
high-speed aggregation and switching. Previously,  
those users wanting their Token Ring server band-  
width increased beyond 32 Mbps faced limited  
options. They could add either FDDI or ATM down-  
links to their Token Ring switches–options that proved  
costly and complex. The Token Ring-in-Fast Ethernet  
(TR-in-FE) system offers a new, simpler option at a  
much lower cost. TR-in-FE offers improvement in the  
following areas:  
Fast Ethernet is relatively well understood and easy to  
configure. The TR-in-FE operates in both copper or  
fiber optic environments. Additionally, many tools  
exist to manage and administer Fast Ethernet due to  
its wide acceptance in the industry and its similarity to  
Ethernet.  
TR-in-FE benefits those MIS managers most interested  
in:  
Preserving existing investments in TR infrastructure  
Seeking low-cost, high-speed connectivity  
Combining Ethernet and Token Ring for common  
Scalability  
server access  
TR switching  
Fast Ethernet is less expensive than other options,  
such as FDDI and ATM. Using FE, the price per port  
for server attachment is 20% that of ATM and FDDI.  
High-speed technologies  
Wire-speed performance  
Flexibility  
TR switching allows the install base of TR equipment  
and its configuration to remain intact and operational  
while allowing for an upgrade to higher performance  
through microsegmentation and interfaces to higher  
speed technologies. TR-in-FE represents one option  
for integrating Fast Ethernet into the TR switched  
environment.  
High-speed flexibility (choice of D/L technology)  
Desktop flexibility (TR, Ethernet)  
Common high-speed infrastructure  
Managability  
Simple to configure and administer  
Cost effective  
TR-in-FE allows both Token Ring and Ethernet to  
share the same Fast Ethernet physical wiring infra-  
structure and server base without impacting network  
 
 
Summary of TR-in-FE Module Features  
1-3  
Summary of TR-in-FE Module Features  
The following lists summarize the features of the  
SuperStack II Switch 2000 TR TR-in-FE module.  
Hardware  
Multimode fiber attachment using duplex connec-  
tors or copper cable attachment using standard  
RJ-45  
Full duplex operation  
Flow control  
LEDs to indicate link integrity and link activity  
Compliance with FCC Class A, CISPR A, and CE  
4544 byte frame size for improved performance  
Easy jumper-setting for crossover switch (copper  
version only)  
Software  
Software configurable hardware  
16 VLAN hardware support  
IEEE 802.1q compatible  
Frame size limiter of 1500 bytes for standard infra-  
structure  
 
 
1-4  
CHAPTER 1: OVERVIEW  
 
TR-IN-FE CONCEPTS  
2
This chapter provides an introduction to Token  
Ring-in-Fast Ethernet concepts for users who are  
unfamiliar with this technology. The following sec-  
tions cover:  
What is Token Ring-in-Fast Ethernet  
(TR-in-FE)?  
Token Ring-in-Fast Ethernet is a 3Com developed  
technology that encapsulates Token Ring frames in  
Fast Ethernet frames. Bridging the gap between  
Token Ring and Ethernet, this technology offers a  
more cost-effective integration than traditional bridg-  
ing and routing, and allows Token Ring users to  
expand their bandwidth while preserving their TR  
infrastructure.  
What is Token Ring-in-Fast Ethernet (TR-in-FE)?  
TR-in-FE Compared to Traditional Methods  
3Com Token Ring-in-Fast Ethernet System  
How TR-in-FE Works  
Tunneling  
Virtual LANs (VLANS)  
Using Token Ring-in-Fast Ethernet technology, Fast  
Ethernet can be used as a cost-effective and scalable  
aggregation point for multiple Token Ring switch con-  
nections. In addition, because both Token Ring and  
Ethernet technologies can coexist in the same Fast  
Ethernet infrastructure, both can share to less costly  
Fast Ethernet connections.  
Through a process known as tunneling (see the  
Tunneling” section below), TR-in-FE uses Fast Ether-  
net to transport natively formatted Token Ring  
frames. This means that both source route and trans-  
parent TR frames addressing information is main-  
tained through Fast Ethernet (FE) so that it may be  
interpreted and utilized by either a destination Token  
Ring (TR) switch or FE server.  
 
           
2-2  
CHAPTER 2: TR-IN-FE CONCEPTS  
TR-in-FE technology works, not by providing frame  
conversion, but by using the Fast Ethernet as a trans-  
port for the Token Ring frames. This means that every  
frame does not need to be parsed deeply, nor does  
source route to transparent frame mapping need to  
happen.  
TR-in-FE Compared to Traditional Methods  
Traditional means of combining Token Ring, Ethernet,  
and Fast Ethernet include bridging and routing. With  
routing, frame forwarding decisions are made in soft-  
ware by looking into the network layer of each frame  
and modifying the frame to reflect the standard  
format of the media for which it is destined.  
Presently, TR-in-FE is based on developing standards  
and requires that FE server connections and Switch  
2000 TR Downlink Modules are 3Com products.  
Once approved, TR-in-FE will be able to be integrated  
with other vendors. FE switching infrastructure may  
be from any vendor.  
Similarly, bridging between these media may be  
accomplished using Translational Bridging, sometimes  
referred to as SRTB or SRTG. This is necessary with  
non-routable protocols like SNA and Netbios. This  
type of bridging deals with all the differences  
between Token Ring and Ethernet frame formats such  
as:  
3Com Token Ring-in-Fast Ethernet System  
The 3Com Token Ring-in-Fast Ethernet includes:  
SuperStack II Switch 2000 TR  
Address fields  
Variable length source-route fields  
Functional address to multicast address mapping  
SuperStack II Switch 2000 TR Token Ring-in-Fast  
Ethernet Module  
NetBuilder provides both routing and SRTG function-  
ality. The decisions are, again, made in software and  
the result is conversion of the source frame to a stan-  
dard destination frame format. The benefit of the tra-  
ditional means listed above is that all frames are  
converted from media to media using standard frame  
formats, which allows for simple mixing and match-  
ing of products from multiple vendors. The downside  
is that these bridges and routers are typically slow,  
expensive, and more difficult to manage than switch  
products.  
Fast Ethernet Switch (SuperStack II Switch 3000)  
3Com Fast Ethernet network interface cards (NIC)  
Token Ring-in-Fast Ethernet Module  
This slide-in module provides a 200 Mbps Full-duplex  
Fast Ethernet interface, which enables the Switch  
2000 TR to become part of a Fast Ethernet switched  
infrastructure. This module allows wire-speed trans-  
mission of Token Ring-in-Fast Ethernet frames. Fast  
Ethernet can be used to connect Token Ring clients to  
Fast Ethernet servers or as an aggregation point for  
multiple Token Ring switched connections.  
 
   
How TR-in-FE Works  
2-3  
How TR-in-FE Works  
Figure 2-1 shows a diagram of a basic TR-in-FE sys-  
tem. The illustration depicts three Switch 2000 TRs  
interfacing with a Switch 3000 through the Token  
Ring-in-Fast Ethernet Module. In this example, the  
Switch 3000 acts as an 800 Mbps point of aggrega-  
tion for this system with multiple FDX Fast Ethernet  
pipes feeding it.  
SuperStack II  
Switch 2000 TR  
Traffic that enters a port on the Token Ring switch  
and that is not destined for another port on the same  
quently, the module puts a Fast Ethernet wrapper  
(see “Tunneling” section below) on the native Token  
Ring frame, and forwards the modified packet as a  
Fast Ethernet frame to the Switch 3000.  
SuperStack II  
Switch 3000 TX  
Fiber  
Copper  
Figure 2-1 A Simple Token Ring-in-Fast Ethernet  
The Switch 3000 handles the frame as it would any  
other FE frame and forwards it to the appropriate  
port. If the destination address is another TR end sta-  
tion located on another switch, the destination  
TR-in-FE Module strips the frame of the Fast Ethernet  
information and sends the native TR frame to the  
appropriate destination port. If the destination is a  
Fast Ethernet attached server, the Fast Ethernet NIC  
with a TR-in-FE driver interprets the frame before pro-  
viding it to upper level applications. The fact that the  
application communicates using TR-in-FE is transpar-  
ent to the user.  
Configuration  
Figure 2-2 illustrates another example of Token  
Ring-in-Fast Ethernet, but one on a scale more exem-  
plary of what a real user configuration looks like as  
part of an integrated system.  
 
   
2-4  
CHAPTER 2: TR-IN-FE CONCEPTS  
Direct attach Workstations  
Figure 2-2 Large scale example of a TR-in-FE configuration.  
 
 
Tunneling  
2-5  
Tunneling  
Token Ring Header Information  
This section describes tunneling, the method by  
which Token Ring frames are encapsulated (embed-  
ded) within Ethernet frames.  
Payload  
AC  
Key  
nSA RIF (optional)  
User Data  
FC nDA  
FCS  
Frames are sets of bits that form an elementary block  
of data to be sent over a communications channel. A  
frame contains its own control information, including  
the transmission address and data for error detection.  
This header information makes certain that the  
frames arrive with their payload (user data) intact and  
at the right destination. Simply put, what tunneling  
does is to take a Token Ring frame and embed it into  
an Ethernet frame to be sent over a Fast Ethernet net-  
work.  
nSA–Non-canonical Source  
Address Field  
RIF–Route Information Field  
AC–Access Control Field  
FC–Frame Control Field  
nDA–Non-canonical Destination  
Address Field  
FCS–Frame Check Sequence  
Figure 2-3 Token Ring Frame.  
The Token Ring frame must be specially tagged when  
preparing it for embedding inside the Ethernet frame.  
Tagging allows an Ethernet frame to carry:  
Requirements  
User priority information over media types other-  
The tunneling scheme must be compatible with Fast  
Ethernet networks so that a mix of Ethernet, 802.3,  
and the Ethernet/Token Ring (E/TR) frames may reside  
on the same segment without interference. It is also  
important that any end station (server, bridge, router)  
be able to reassemble the original TR frame. Source  
routing from Token Ring to Ethernet and back to  
Token Ring should be supported.  
wise unable to signal priority information  
Token Ring data in native format (802.5) over  
non-802.5 media  
VLAN identification information  
Tagging requires the addition of a tag header to each  
frame. This header is inserted immediately following  
the Destination Address (DA), Source Address (SA),  
and, if present, the Routing Information Field (RIF). If  
the source and destination media differ, tagging the  
frame may involve translation or encapsulation of the  
frame remainder. Tagging also requires re-computa-  
tion of the Frame Check Sequence (FCS), which are  
extra characters added to frames for error control  
purposes.  
Token Ring Frames  
Figure 2-3 shows a simplified drawing of a Token Ring  
frame.  
 
   
2-6  
CHAPTER 2: TR-IN-FE CONCEPTS  
The Tag Header carries a Tag Protocol Identifier (TPID)  
that identifies the frame as a Tagged Frame. The  
Header also carries Tag Control Information (TCI),  
which consists of the following fields:  
Header Information for Ethernet/Token Ring (E/TR) Frames  
Payload  
User Priority  
User Data  
cDA cSA TPID  
TR-encap  
TCI  
RCNTL RDs  
PAD FCS  
LEN  
Key  
VLAN Identifier (VID)  
cDA–Canonical Destination Address Field  
cSA–Canonical Source Address Field  
TPID–Tag Protocol Identifier Field  
The User Priority field allows the tagged frame to  
carry user priority information across bridged LANs  
where individual LAN segments may not be able to  
signal for priority information. An 802.3/Ethernet rep-  
resents such a segment.  
TCI–Tag Control Information Field, which includes User Priority, TR-encap, VLAN ID  
LEN–Length in octets of RCNTL + RDs + User Data Fields  
RCNTL–Route Control Field  
RDs–Route Descriptor (0...n) from the original frame  
PAD–Ethernet frames must be at least 64 bytes in length  
FCS–Frame Check Sequence  
The primary purpose of the TR-encap flag is to permit  
tunneling of Tagged Frames between two 802.5 LAN  
segments across a VLAN tagged region. It also allows  
an end station on an 802.5 subnetwork to communi-  
cate with an end station on an 802.3 subnetwork.  
Figure 2-4 Token Ring-in-Fast Ethernet Frame.  
The VLAN Identifier (VID) field uniquely identifies the  
VLAN to which a frame belongs. See the next section,  
“Virtual LANs (VLANS),” for a complete explanation  
of VLANs and the VLAN Identifier (also known as  
VLAN ID or VID). The Route Control field is added to  
the frame to carry TR specific information such as  
Transparent or SR information. The payload is TR spe-  
cific in content.  
Once the tunneling process is complete, the com-  
bined Token Ring-in Fast Ethernet frame resembles  
the frame shown in Figure 2-4 (simplified). The pro-  
cess is reversed to de-encapsulate the frame.  
 
 
Virtual LANs (VLANS)  
2-7  
VLANs facilitate the administration of logical groups  
of stations that can communicate as though they  
were on the same LAN. VLANs also facilitate moves,  
adds, and changes of members of logical groups.  
Virtual LANs (VLANS)  
What is a VLAN  
A VLAN is defined as a group of location- and topol-  
Traffic between VLANs is firewalled. This limits the  
propagation of multicast and broadcast traffic  
between VLANs.  
ogy- independent devices that communicate as  
though they were on the same physical LAN. This  
means that they are not restricted by the hardware  
that physically connects them, and segments are  
defined by flexible user groups created by the user.  
For example, with VLANS, the user can define a net-  
work according to:  
Each distinct VLAN is uniquely identified throughout  
the bridged LAN. A consistent representation of a  
VLAN exists across a VLAN fabric (including FE and  
ATM). This means that the shared VLAN knowledge  
of a particular packet remains the same as the packet  
travels from one point to another.  
Department Groups—A VLAN could be created for  
the Marketing Department, another VLAN for the  
Finance Department, and still another for the Devel-  
opment Department.  
Port-Based Distribution  
The switch uses a port-based approach to VLAN  
functionality. This approach allows bridges to classify  
all received tagged and untagged frames as belong-  
ing to a particular VLAN.  
Hierarchical Groups—A VLAN could be created for  
directors, another for managers, and still another for  
general staff.  
Usage Groups—A VLAN could be created for Email  
users, another for multimedia users, and so on.  
NOTE: In port-based VLAN operation, the VLAN clas-  
sification of an untagged frame is implicitly deter-  
mined and bases on the port of arrival of the frame.  
This facility requires association of a VLAN ID with  
each of the bridge’s ports. Only received frames lack-  
ing an explicit VLAN ID are subject to this impilcit clas-  
sification.  
Advantages of VLAN  
All 802 media and shared media support VLANs. In  
addition, implementing VLANs:  
Eases the change of devices  
Helps control broadcast traffic  
Provides extra security  
Using the port-based approach, a specific VLAN ID is  
associated with each bridge port. This VLAN ID,  
known as a Port VLAN Idendtifier (PVID), provides the  
VLAN classification for frames received through that  
port. This value may be manager configured.  
 
   
2-8  
CHAPTER 2: TR-IN-FE CONCEPTS  
 
INSTALLING AND SETTING UP THE MODULE  
3
This chapter includes important safety and configura-  
tion information, including:  
Following Safety Information  
Following Safety Information  
Pre-installation Procedure  
Installation  
WARNING:Before installing or removing any compo-  
nents of a device, or carrying out any maintenance  
work, you must read the safety information provided  
in Appendix A, “Safety Information” of this guide.  
Disconnect the device from the main power supply.  
Post-Installation Checks  
AVERTISSEMENT:Il faut lire les notices de sécurité  
dans l’appendice A de ce guide avant d’installer ou  
d’enlever les parties de l’unité ou faire le travail  
d’entretien. Débrancher la pièce de raccordement  
d’alimentation.  
WARNUNG:Bevor Sie Ein - oder Ausbau des Gerätes  
vornehmen, butte lessen Sie die Anweisungen in  
Appendix A genau durch. Das Gerät darf nicht ans  
Stromnetz angeschlossen sein.  
CAUTION:Only hold the TR-in-FE Module by the  
edges to avoid damage from static. Do not touch the  
top or bottom of the circuit board.  
Pre-installation Procedure  
Before installing the TR-in-FE Module familiarize your-  
self with the module and the Switch into which it will  
be installed.  
 
               
3-2  
CHAPTER 3: INSTALLING AND SETTING UP THE MODULE  
maximum inter-station distance (including  
device-to-network connectors) should not exceed  
two kilometers (1.25 miles) for full duplex. For half  
duplex, the maximum inter-station distance should  
not exceed 300 meters.  
Installation  
This section explains how to install the TR-in-FE  
Module into a SuperStack II Switch 2000 TR device.  
Installation is similar for all devices compatible with  
the TR-in-FE Module.  
For copper: 3Com supports Category 5 type UTP  
cable at distances up to 100 m for both half and  
full duplex.  
CAUTION: Always follow Electro Static Discharge  
(ESD) procedures when installing an I/O Module.  
For more on cable specifications, see Appendix C,  
“TR-in-FE Module Technical Specifications”.  
1 If the Switch is connected to the network, turn off the  
power and disconnect the switch from the main  
power supply and the network.  
8 Connect the cable to the module. Connect the Rx  
connector to the ports Tx socket. Connect the Tx  
connector to the ports Rx socket. Do the same at the  
2 Place the Switch on a flat, clean, hard, work surface.  
3 Locate and remove the blanking plate that covers the  
switch Module slot. See Figure 3-1. Retain the blank-  
ing plate and the screws for future use.  
For fiber: Each end of the fiber cable has a trans-  
mit (Tx) and receive (Rx) connector.  
To locate the slot where the TR-in-FE Module resides,  
refer to the manual that accompanies your device .  
For copper: A crossover cable may be required for  
operation, which requires a jumper setting on the  
module. See“Jumper Settings” in this chapter.  
4 Use the guide rails within the Switch slot to align the  
TR-in-FE Module. The location of the guide rails and  
the correct positioning of the plate is shown in  
Figure 3-1.  
9 Connect the downlink port to a Fast Ethernet  
repeater, server, or switch. If you plan running full  
duplex, ensure that the other end of the link supports  
it. A repeater will not support full duplex whereas a  
switch such as the SuperStack 3000 will.  
5 Slide the TR-in-FE Module into the slot without touch-  
ing the top or bottom of the circuit board, which  
positions upside down on the plate. Ensure that the  
module is pushed fully into the unit.  
NOTE: The Fast Ethernet switch does not have to be a  
SuperStack II 3000. However, due to the 3000’s capa-  
bility of handling frame sizes larger than 1500 bytes  
as well as its cost efficiency, the 3000 is the switch of  
preference for anchoring the system.  
6 Use the thumb screws attached to the TR-in-FE  
Module to fix the module firmly into place.  
7 Connect the cable to the TR-in-FE port.  
For fiber: 3Com supports multi-mode fiber  
50/125 mm and an SCduplex connector. The  
10 Power up the switch. The link status LED turns green  
once a valid connection is made.  
 
 
Post-Installation Checks  
3-3  
TokenRing-in-FastEthernetModule  
3C510630  
Rx  
Tx  
Tx  
Rx  
FarEndStatus  
LinkStatus  
Reset  
ConsolePort  
9600,8,1,N  
Figure 3-1 Installing the TR-in-FE Module  
LED Summary  
This section describes the LEDs that provide status  
and troubleshooting information.  
Post-Installation Checks  
LEDs on the Switch are described in Table 3-1.  
This section describes the LEDs and basic checks used  
to verify your installation, and to ensure that the  
LEDs on the TR-in-FE Module are described in  
Table 3-2.  
 
           
3-4  
CHAPTER 3: INSTALLING AND SETTING UP THE MODULE  
Table 3-1 Front Panel LEDs on the Switch 2000 TR  
Table 3-2 LEDs on the TR-in-FE Module Panel  
LED Name  
Color/State  
Green ON  
Indicates  
LED Name  
Color/State  
Green ON  
Indicates  
MGMT  
(On the front of  
the Switch)  
Switch and TR-in-FE Module are oper-  
ating normally.  
Full Duplex  
Full duplex link is on (port con-  
figured for full duplex opera-  
tion).  
(On TR-in-FE Mod-  
ule)  
Green fast  
flashing  
Software download taking place.  
Green OFF  
Green ON  
Half duplex link is on.  
Green slow  
flashing  
The Switch and TR-in-FE Module are  
initializing (for example, undergoing  
a Power On Self Test).  
Port Status  
(On TR-in-FE Mod-  
ule)  
A link is present on the Ether-  
net port.  
Green OFF  
Yellow ON  
The Link is not present on the  
Ethernet Port.  
Yellow  
The Switch failed its Power On Self  
Test (POST).  
TX  
The TR-in-FE port is transmit-  
ting.  
Yellow flash- TR-in-FE Module failed its Power On  
ing  
(On TR-in-FE Mod-  
ule)  
Self Test (POST).  
OFF  
The TR-in-FE port is not trans-  
mitting frames.  
OFF  
No power to the Switch.  
Downlink  
Status  
(On front of the  
Switch)  
Green ON  
TR-in-FE port enabled and a link is  
present.  
RX  
Yellow ON  
OFF  
The TR-in-FE port is receiving  
frames.  
(On TR-in-FE Mod-  
ule)  
Green flash- Link present but TR-in-FE port dis-  
ing  
The TR-in-FE port is not receiv-  
ing incoming frames.  
abled.  
Yellow ON  
MDIX (copper only) Green ON  
RJ-45 configured as a cross-  
over.  
Switch has not recognized the  
TR-in-FE Module.  
Green OFF  
RJ-45 configured as a static  
connector.  
Yellow flash-  
ing  
The TR-in-FE Module has failed the  
Power On Self Test (POST).  
OFF  
A link is not present on the TR-in-FE  
port.  
Checking the Power Supply  
Check the MGMT LED on the Switch. If the MGMT  
LED is not lit, there is a power supply problem. Try the  
following troubleshooting procedures, restarting the  
Switch after each step:  
The following table describes the LED functions on  
the TR-in-FE Module.  
 
       
Post-Installation Checks  
3-5  
a Check that the power supply is plugged into the  
device using a power outlet that is known to be  
working or that the RPS is powered.  
Checking the Physical Connections  
This section assumes that the TR-in-FE Module is cor-  
rectly installed.  
b Check that the main power supply switch on the  
Check that the Link Status LED on the TR-in-FE  
Module is lit GREEN. If the LED is not lit, there is a  
problem with the physical connection. Follow the  
troubleshooting information below:  
wall is set to the ON position.  
c Check and, if necessary, change the fuse on the  
Switch or plug. See the user guide that accompa-  
nies your Switch device for details about fuses.  
a Ensure that both devices are powered up, and that  
d Replace the power cable with a cable known to be  
the ports at both ends of the link are enabled.  
working.  
b Ensure that the cable is securely connected to the  
e Contact 3Com Technical Support.  
port at both ends of the link.  
c If using fiber, check each end of the cable to  
ensure that each of the fiber connectors is correctly  
connected. If your cable connectors can be  
reversed, you may need to reverse the TX and RX  
cable connectors at one end of the link.  
Checking that the TR-in-FE Module is Installed  
Correctly  
Power up the Switch and check that the Downlink  
Status LED on the front of the Switch is lit Green.  
If the MGMT LED is not lit Green, remove and then  
re-install the TR-in-FE module.  
d If using copper, the TX and RX pairs may need to  
be swapped. This requires changing the jumper  
setting on the module. See “Jumper Settings.”  
You can confirm that the TR-in-FE Module is installed  
correctly by accessing the local management screens  
correctly, the TR-in-FE Configuration option appears  
in the Main Menu.  
e Ensure that the fiber connection is not broken.  
Some cable connectors have been designed so that  
they cannot be fitted incorrectly. Never use excessive  
force to connect cables.  
If the TR-in-FE Configuration option does not appear,  
It could be that the TR-in-FE Module is still initializing.  
If the TR-in-FE Module is still initializing, the MGMT  
LED flashes GREEN.  
f If you are running full duplex, make certain that  
the Fast Ethernet switch supports this mode. A  
repeater will not support full duplex whereas a  
switch such as the SuperStack 3000 will.  
g Remove any objects obstructing the cable and  
straighten out any kinks in the cable.  
 
     
3-6  
CHAPTER 3: INSTALLING AND SETTING UP THE MODULE  
h Check that your cable meets Fast Ethernet specifi-  
cations. See Appendix C.  
i
j
Replace the cable, and check the Link Status LED  
again.  
Contact 3Com Technical Support; see “Support  
from 3Com”, in Appendix D.  
LK1  
MDIX  
MDI  
Jumper Settings  
The Module can be easily damaged by electrostatic  
discharge. Before handling the module, please  
observe safety and electrostatic discharge precau-  
tions.  
Port configured  
as MDI (default)  
You can configure the TR-in-FE module to operate as  
MDI (default) or MDIX. Follow the rules and proce-  
dure below. See Figure 3-2.  
Port configured  
as MDIX  
MDI—If TR-in-FE module is connected to another  
Figure 3-2 TR-in-FE Module Jumper Settings  
switch with an MDIX port.  
MDIX—IIf TR-in-FE module is connected to an end-  
station or server.  
The MDIX setting provides a crossover, the MDI set-  
ting does not.  
A crossover cable can be used to connect two MDI or  
two MDIX ports together.  
 
   
ACCESSING MANAGEMENT FEATURES  
4
The menu-driven user interface built into the device is  
known as the VT100 or Local Management interface.  
The VT100 management interface has a forms-based  
structure with pre-defined security levels, enabling  
access to be restricted to particular users. This chapter  
provides information on the following:  
The VT100 Console  
This section describes the screen conventions used in  
the Switch 2000 TR VT100 console interface. The  
VT100 interface allows you to set and/or view these  
switch parameters:  
Console Menu Map  
Logging On  
IP and associated addresses and management  
Port personality, speed, and state  
Bridge type, bridge number, and Spanning Tree  
state  
Switch 2000 TR status and hardware and software  
Logging Off  
version numbers  
The manual that accompanies your SuperStack II  
Switch 2000 TR describes accessing and navigating  
local screens.  
Choice Field  
Example display:  
*text*  
Text enclosed with asterisks is a list from which you  
can select one option. Press [Space] to cycle through  
the options. When your choice is highlighted, press  
[Down Arrow] or [Return] to move to the next field.  
Refer to Figure 4-1,“VT100 Console Menu Map with  
I/O Module Detail.”  
Entry Field  
Example display:  
[text]  
 
           
4-2  
CHAPTER 4: ACCESSING MANAGEMENT FEATURES  
Text enclosed in square brackets on the screen indi-  
cates a text entry field. This field may be text, numeric  
data, or hexadecimal data.  
[Down Arrow]—moves down a list item by item  
and starts over again at the top.  
[Ctrl] + [U]—moves the cursor one screen up the  
list box.  
Password fields are hidden; the text you type is not  
shown on the screen.  
[Ctrl] + [D]—moves the cursor one page down the  
list box.  
In some cases an Entry field has a default entry. To  
change the default value, simply type in a new value  
for this field and the default entry will be erased.  
Press [Down Arrow] or [Return] to move on to the  
next field.  
Key Board Shortcuts  
Here are some shortcuts you can use to navigate  
within the console screens:  
[Tab]—Moves from one field on a form to the next  
Button  
on any screen without making a change.  
Example display:  
[Return]—Moves you to the next form field after  
you have made an entry.  
OK  
[Left Arrow]—Moves you to the previous field on  
the screen or the previous character in an editable  
field.  
Text for button is always shown in uppercase letters.  
Buttons carry out actions. For example OK: or CAN-  
CEL. To select a button, move the cursor to the  
button and press [Return].  
[Right Arrow]—Moves you to the next field on the  
screen or the next character in an editable field.  
List Boxes  
[Ctrl] + [R]—Refreshes the screen.  
Example display:  
[Ctrl] + [B]—Moves the cursor to the next button.  
[Ctrl] + [P]—Returns to the previous screen.  
monitor, manager, or security  
A list box allows you to select one or more items  
from a list. These keys allow you to select from a  
list:  
[Ctrl] + [N]—Moves to the next screen after imple-  
menting current screen settings.  
[Ctrl] + [K]—Displays list of key strokes.  
[Return]—moves the cursor to the next field. Car-  
ries out a buttons action.  
Correcting Text Entries  
[Space Bar]—moves through a text list for a field.  
Use [Delete] on a VT100 terminal or [Backspace] on a  
PC. This key moves the cursor one space to the left  
Use it to highlight the item or value you want.  
 
       
Console Menu Map  
4-3  
and deletes a character. To delete more than one  
character, press the key once for each character.  
Console Menu Map  
Figure 4-1 provides a map of available I/O Module  
local management screens. The I/O Module screens  
are shaded gray and appear when the TR-in-FE  
Module is installed. If these screens do not appear,  
your TR-in-FE Module is not installed correctly.  
Check carefully before using the Control keys. If you  
are using Telnet or a terminal emulation program you  
may find that some Control keys do not work the  
same or that they control other functions. Refer to  
the documentation that accompanies your Telnet or  
terminal emulation software.  
Default Users  
The resident management console allows three  
default user types. They cannot be deleted or altered  
by the network administrator. Refer to Table 4-1 for  
default names and passwords. Refer to Appendix B  
for a listing of screen access rights.  
Table 4-1 Default User Names and Passwords  
Table 2  
Default Name  
monitor  
Password  
monitor  
manager  
security  
Access Level  
monitor  
manager  
manager  
security  
security  
 
       
4-4  
CHAPTER 4: ACCESSING MANAGEMENT FEATURES  
Switch 2000  
Main Banner  
Switch 2000  
Logon  
Switch 2000  
Main Menu  
Quick  
Setup  
User  
Access  
Levels  
Switch  
Management  
Software  
Upgrade  
Management  
Setup  
Remote  
Poll  
Status  
Initialize  
Reset  
Logoff  
Bridge  
Setup  
Fault  
Log  
Local  
Security  
Poll  
Setup  
Traps  
Stack  
TR Port  
Setup  
Unit  
Port  
Create  
User  
Serial  
Port  
Delete  
Users  
VLAN  
Info Setup  
Edit  
User  
VLAN  
Bridge  
I/O Module  
Statistics  
Setup  
TR Port Stats  
TR Port Setup  
Bridge Setup  
Traffic Statistics  
Figure 4-1 VT100 Console Menu Map with I/O Module Detail  
 
 
The LCD Console  
4-5  
1 Press [Enter] to view the next level.  
The LCD Console  
2 Press [Down Arrow] until  
The SuperStack II Switch 2000 TR has an LCD console  
Switch 2000 TR > I/O Module appears.  
located on the front panel. Use this console for read-  
ing and setting the Switch and module parameters.  
Refer to the “SuperStack II Switch 2000 TR User  
Guide” for a menu map and for specific information  
and uses of the console.  
3 Press [Enter]. I/O Module > Module Type appears.  
4 Press [Enter]. STATUS > Module Type appears.  
5 Press [Down Arrow] to scroll down through the I/O  
Module menus.  
The console provides a quick method for viewing the  
type of module in the Switch as well as the hardware  
and software versions of the module. See Figure 4-2.  
6 Press [Enter] at any one of the following fields to view  
the information described below. Press [Down Arrow]  
to move through the circular menus.  
Module Type—module type  
The menus of the LCD module are circular. Press  
[Enter] until the menu you wish to view appears. For  
more information refer to Chapter 5 of the Switch  
2000 TR User Guide that accompanies your switch.  
Module State—current state of module (UP,  
DOWN)  
HW Version—current version of hardware  
To view the module status, proceed as follows from  
the top LCD menu which displays the  
Switch 2000 TR banner:  
Module Type  
Switch 2000 TR  
> I/O Module  
ENTER  
ENTER  
Module State  
HW Version  
Figure 4-2 I/O Module LCD Menus  
 
   
4-6  
CHAPTER 4: ACCESSING MANAGEMENT FEATURES  
If your terminal is already set up with these values,  
the Main Banner appears as soon as power-up is  
complete.  
Logging On  
1 Connect your terminal to the Console port on the  
rear panel of the Switch 2000 TR using a cross-over  
cable for a serial line connection. Refer to the Switch  
2000 TR User Guide for more information.  
3 Press [Return] to display the Logon screen at the Main  
Banner.  
4 Type in your user name and password. Note that they  
The Console port automatically detects the line-speed  
(baud rate), and uses the following default settings:  
are both case-sensitive:  
If you are logging on for the first time (after instal-  
lation or initialization), use a default user name  
and password to match your access requirements.  
We recommend that you use the default user  
securityÓso that you can access all functions.  
The defaults are shown in Table 4-3.  
auto-baud  
8 character size (data bits)  
1 stop bit  
no parity  
Character size, stop bit, flow control, and parity  
values cannot be changed.  
If you have been assigned a user name, access  
level and password, type in these details.  
2 Press [Return] two or more times until the Switch  
2000 Main Banner appears (shown in Figure 4-3).  
Table 4-3 Default Users  
User Name  
Default  
Password  
Access Level  
monitor  
monitor  
monitor - this user can view, but  
not change all manageable  
parameters  
manager  
security  
manager  
manager - this user can access  
and change the operational  
parameters but not special/secu-  
rity features  
security  
security - this user can access  
and change all manageable  
parameters  
Figure 4-3 Main Banner  
 
       
Logging Off  
4-7  
When you have logged on, the Main Menu screen  
displays, as shown in Figure 4-4.  
Logging Off  
If you accessed the facility using a Telnet session or  
modem, the connection closes automatically. If not:  
5 Select task or logoff.  
1 Select the LOGOFF option from the bottom of the  
Main Menu.  
2 Press [Return].  
Automatic Logout  
There is a built-in security timeout on the VT100 inter-  
face. If you do not press any keys for three minutes, a  
message warns you that the inactivity timer is about  
to expire. If you do not press a key within 10 seconds,  
the timer will expire and the screen will be locked. All  
displayed data continues to update. When you next  
press a key, the display changes to the Auto Logout  
screen.  
Figure 4-4 Main Screen  
The Auto Logout screen prompts you to enter your  
password again. If the password is correctly entered,  
the screen that was active when the timer expired is  
re-displayed. If you make a mistake entering your  
password, you will be returned to the Logon screen.  
 
     
4-8  
CHAPTER 4: ACCESSING MANAGEMENT FEATURES  
 
CONFIGURING THE TR-IN-FE MODULE  
5
This chapter describes how to configure the TR-in-FE  
Module, including:  
TR-in-FE Module Configuration Map  
The following map displays the path of the TR-in-FE  
Port Configuration screens. Configuration screens are  
shaded gray.  
TR-in-FE Module Configuration Map  
Setting Up a Module  
Setting Up a VLAN  
I/O Module  
Statistics  
Setup  
Figure 5-1 shows the TR-in-FE Configuration Menu  
Map.  
TR Port Stats  
TR Port Setup  
Bridge Setup  
Traffic Statistics  
Figure 5-1 I/O Module TR-in-FE Configuration Map  
 
           
5-2  
CHAPTER 5: CONFIGURING THE TR-IN-FE MODULE  
Setting Up a Module  
The Module Configuration Screen displays the set-  
tings used by the TR-in-FE Module to communicate  
with other devices on the network.  
It is unlikely that you will need to change the value of  
these settings once they have been set.  
CAUTION: If you need to change the value of any of  
the settings, you may experience a temporary loss of  
communication while the values are reset. If you do  
not need to make any changes, select the CANCEL  
button and not the OK button. Selecting the OK  
button resets the device.  
Figure 5-2 I/O Module Screen (CONFIG)  
To configure a module, log on to the Switch 2000 TR  
and proceed as follows:  
5 Press [Return].  
The Port Setup screen appears. See Figure 5-3.  
1 Select SWITCH MANAGEMENT from the Main Menu.  
2 Press [Space Bar] and select *I/O Module*.  
The I/O Module screen appears. The I/O Module  
screen allows you to view statistics and set up the  
TR-in-FE module. See Figure 5-2.  
If the I/O Module option does not respond, your  
TR-in-FE module is not installed correctly. Refer to  
Chapter 3 for information on installation.  
3 Enter the *Unit ID* of the unit with the module  
installed.  
4 Select SETUP.  
Figure 5-3 Port Setup Screen  
 
       
Setting Up a Module  
5-3  
The following fields are shown on the screen:  
J6 indicates the least amount of effort by the port to  
back off collisions. A value of J13 indicates more  
effort on the port. This feature is reserved for quali-  
fied and knowledgeable network managers.  
Unit ID—Identifies the currently selected Switch unit.  
Port ID—Displays the current module type. It should  
read TIF.  
VLAN Enable Mask—This field allows you to restrict  
or allow for membership in specific VLAN groups.  
Each bit in the two-byte field represents a VLAN  
denomination from 1 to 16 in hexadecimal. Refer to  
“Setting Up a VLAN” on page 5-5 for more informa-  
tion.  
Admin. State—This field allows you to *Enable* or  
*Disable* the TR-in-FE port.  
Internal Priority—This field allows you to distribute  
the available bandwidth among the ports. *High* pri-  
ority ports are given priority access to internal  
resources, taking priority over *Normal* priority  
ports.  
It is strongly recommended that you do not alter  
these settings.  
Bridge Parameters  
Full Duplex—The TR-in-FE Module works with either  
a Full Duplex or Half Duplex mode of operation. The  
Full Duplex field allows you to *Enable* or *Disable*  
Full Duplex mode. Disabling Full Duplex automatically  
puts the TR-in-FE Module in Half Duplex mode.  
This section describes how to set bridge parameters  
for the TR-in-FE.  
Spanning Tree  
Spanning Tree is an algorithm designed to eliminate  
loops in networks. The algorithm detects and logically  
prohibits redundant paths by placing some bridge  
ports in the blocking state so that only one route exits  
between any two LANs and therefore any two sta-  
tions. After Spanning Tree eliminates redundant  
paths, the network reconfigures and stabilizes. Any  
time the network topology changes, the algorithm  
automatically relearns the new configuration and  
adjusts the bridge ports accordingly. This guarantees  
that all stations are connected.  
Max Packet Size—This field allows you two choices  
for setting the maximum packet size.  
1518—Use this value in traditional Fast Ethernet  
environments.  
4544—Use this value for larger packets when  
configured with a SuperStack II Switch 3000.  
Jamming Mode—This field allows you to restrict the  
amount of packet loss allowable when configured  
with conventional switches. Jamming provides a vari-  
able parameter for determining the number of colli-  
sions. This feature is most helpful in networks using  
lots of repeaters. Choose from J6 through J13 where  
Priority—Priority determines the choice of port  
when the Switch 2000 TR has two ports connected  
to the same LAN, creating a loop.  
 
   
5-4  
CHAPTER 5: CONFIGURING THE TR-IN-FE MODULE  
Ports with a lower value have a higher priority and  
will be blocked only after ports with a higher value  
and a lower priority have been blocked.  
In the case of TR-in-FE, a virtual LAN ID must be  
assigned to the FE cloud. This allows Source Routing  
to proceed as though the FE media supported TR  
natively. The entire FE transparently forwarded cloud  
appears as a single “ring” and hence a single hop to  
attached TR endstations. This also allows FE servers to  
participate in source routing.  
Path Cost—Path cost determines the amount of  
overhead required to forward packets to the root  
through this port.  
The higher the path cost, the less likely Spanning  
Tree will use a port for forwarding. The lower the  
cost, the more likely Spanning Tree will use a port  
for forwarding.  
Attached Lan Id—A unique number that identi-  
fies the segment to which the port connects. This  
value can be set between 0 and FFF (0-4095). A  
value of FFFF (65535) indicates that no segment  
number has been assigned to this port.  
NOTE: It is always recommended that, in the case of  
a loop formed with a low speed port, the high-speed  
ports do not block. The switch automatically provides  
this function with default settings (port speed is part  
of the spanning tree calculations). Be aware of this, if  
the spanning tree values are modified.  
Max Route-Desc—This value describes the  
number of routing descriptions allowed in All  
Route Explorer (ARE) or Spanning Tree Explorer  
(STE) frames. This is also referred to as “hop  
count” limit since it limits the number of rings a  
packet can traverse.  
Fast Fwd—Frames are forwarded as soon as the  
destination address is received and verified.  
STE Mode—This value determines how this port  
responds when presented with Spanning Tree  
Explorer (STE) packets. Set the field accordingly by  
pressing the [Space Bar].  
Source Routing  
Source Routing is a method of allowing a ring station  
(node) on a Token Ring network to communicate with  
another ring station on a different ring intercon-  
nected by bridges. The “source” ring station, which is  
the node initiating the communication, is responsible  
for dynamically determining and then maintaining  
information about the “route” to the destination ring  
station. A route is simply the path a packet takes  
through a source route bridged network from the  
source ring station to the destination ring station.  
Disabled—Indicates that the port will not  
accept or propagate STE packets, and any pack-  
ets received will be discarded.  
Forced—Indicates that the port will always  
accept and propagate STE packets.  
Auto-Span—Indicates that the port will accept  
and propagate STE packets when its Spanning  
Tree state is forwarding.  
 
 
Setting Up a VLAN  
5-5  
Each time you complete the entry fields for a VLAN  
you must select APPLY to invoke the changes. As  
soon as you select a different VLAN using the VLAN  
field, any edits not already applied are lost.  
Setting Up a VLAN  
TR-in-FE network. A TR-in-FE port can be in one or  
more (up to 16) VLANs.  
Included in this screen are the following fields:  
TR VLAN Info Setup Screen  
VLAN Name—Name assigned to identify each (up  
to 16) VLANs.  
To set up a TR-in-FE VLAN, proceed as follows from  
the main menu:  
802.1q VLAN ID—A 12-bit ID used to identify a  
particular VLANs frames for routing across FE  
media. This ID defines which frames should be  
received and forwarded to a VLAN via the TR-in-FE  
module. If TR ports on separate boxes are to be  
connected via TR-in-FE, then this parameter must  
be identically configured on both boxes. By  
default, all TR ports are assigned to VLAN 1, and  
the 802.1q VLAN ID is identical to the VLAN  
number assigned to the box.  
1 Use the [Space Bar] to scroll to VLAN.  
2 Select VLAN INFO.  
3 Press [Return].  
The VLAN Info Setup screen appears. See Figure 5-4.  
TR VLAN Setup Screen  
Use this screen to assign VLANs to the TR-in-FE port,  
and to associate a backbone port (the place to which  
unknown unicasts are forwarded) with each VLAN.  
To set up, proceed as follows from the I/O Module  
menu:  
1 Use the [Space Bar] to scroll to VLAN.  
2 Select SETUP.  
Figure 5-4 TR VLAN Info Setup Screen  
4 Select the VLAN that you wish to configure. Enter the  
number associated with the VLAN in the VLAN ID  
field.  
3 Press [Return].  
The VLAN Info Setup screen appears. See Figure 5-5.  
 
     
5-6  
CHAPTER 5: CONFIGURING THE TR-IN-FE MODULE  
Figure 5-5 VLAN Setup Screen  
4 Scroll the VLAN list using the [Up and Down] keys.  
 
 
MONITORING THE TR-IN-FE MODULE  
6
This chapter describes how to monitor the status and  
performance of your TR-in-FE Module and explains  
the meaning of the statistics.  
TR-in-FE Module Statistics Map  
Figure 6-1 shows the screen map. Monitoring screens  
are shaded gray.  
TR-in-FE Module Statistics Map  
Statistics Overview  
Port Statistics (Traffic)  
I/O Module  
Statistics  
Setup  
TR Port Stats  
TR Port Setup  
Traffic Statistics  
Figure 6-1 Status Screen Map  
 
               
6-2  
CHAPTER 6: MONITORING THE TR-IN-FE MODULE  
Unit IDIdentifies the currently selected unit.  
Statistics Overview  
Port IDIdentifies the currently selected port. It  
should read TIF.  
The TR Port Statistics screen provides a top level sum-  
mary of TR-in-FE Port statistics. You can use the sum-  
mary to estimate the amount of traffic on your  
network backbone, and to check the health of the  
incoming connection. To view the summary, proceed  
as follows from the I/O Module menu:  
Link StateDisplays the current state of the unit.  
The states include:  
Listening—The state in which all ports are  
placed while Spanning Tree configures the net-  
work topology. Ports remain in this state until  
the root bridge is selected. This period should  
be long enough for a port to hear from all other  
ports on the switch.  
1 Enter the *Unit ID* number of the unit you wish to  
view.  
2 Select the STATISTICS button.  
The TR Port Statistics screen appears. See Figure 6-2.  
Learning—The state in which ports receive  
data on the topology of the network for the  
purpose of learning the stations attached to the  
port. If the port receives no information that  
would force it into the blocking state, then it  
moves on to the forwarding state.  
Forwarding—This state allows the port to per-  
form standard switching and bridging func-  
tions. Packets are received and the port either  
forwards or discards them based on the address  
of the packet and the switchs address table.  
Blocking—In this state, the port continues to  
receive data on the status of the network topol-  
ogy but does not transmit them. The port nei-  
ther receives packets nor learns the addresses of  
stations for forwarding or receiving.  
Figure 6-2 TR Port Statistics Screen  
The figures shown for each statistic on this screen  
include TR-in-FE management traffic and normal  
Token Ring traffic.  
Disabled—The state in which Spanning Tree  
has been turned off. Port is disabled by man-  
agement.  
The Port Statistics screen displays the following fields:  
 
     
Port Statistics (Traffic)  
6-3  
Broken—No cable attached.  
Port Statistics (Traffic)  
Current Utilization—The percentage of bandwidth  
usage for the port you are currently viewing. This  
value indicates the general traffic level on the individ-  
ual port. Ideally, this figure should be below 60%,  
which indicates that the port is responsible for a rea-  
sonable amount of traffic relative to the entire ring.  
The TR Port Statistics (Traffic) screen provides a  
detailed display of statistics for the port you are view-  
ing. To view the Port Statistics screen, proceed as fol-  
lows from the TR Port Statistics screen:  
1 Select TRAFFIC STATISTICS button in the lower  
left-hand corner of the screen.  
High utilization values suggest that you should adjust  
the network topology by reducing load on that port  
through segmentation.  
The TR Port Statistics screen appears. See Figure 6-3.  
Frames Forwarded—A running average of the pro-  
portion of the received frames forwarded. This value  
is expressed as a percentage of all received frames,  
based on a sampling interval of 20 seconds.  
Broadcast Frame Bandwidth—A running average  
of the broadcast frame bandwidth. This value is  
expressed as a percentage of theoretical maximum  
bandwidth availability, based on a sampling interval  
of 20 seconds.  
Figure 6-3 Sample TR Port Statistics (Traffic) Screen  
Error Frames—This field displays a running average  
of the percentage of error frames with CRC errors  
and is based on a sampling interval of 20 seconds.  
The Port Statistics screen displays the following fields:  
Unit ID—The identifying number of the unit you are  
viewing.  
Traffic Statistics—Select this category to view the  
Port Statistics (Traffic) screen. See the next section.  
Port ID—The identifying name of the port you are  
viewing. Should read TR-in-FE.  
 
       
6-4  
CHAPTER 6: MONITORING THE TR-IN-FE MODULE  
Frames Received—The total number of frames that  
have been received by the port including frames with  
errors.  
ErrorsTotal of both line errors (CRCs) and lost  
frames.  
Frame Size Analysis—A series of counters that rep-  
resent the composition of the traffic on the Switch  
2000 TR. The counters display the percentage of  
packets categorized by received length as represented  
by the following octet parameters:  
Frames Transmitted—The total number of frames  
transmitted by the port, including frames with errors.  
Multicasts Frames—The number of frames success-  
fully received with a multicast destination address.  
This number does not include frames directed to a  
broadcast address or frames received with errors.  
18 to 63 octets  
64 to 127 octets  
Broadcast Frames—The number of frames received  
that have a broadcast destination address. This  
number does not include frames with errors.  
128 to 255 octets  
256 to 511 octets  
512 to 1023 octets  
1024 to 2047 octets  
2048 to 4095 octets  
Packets greater than 4095 octets  
Octets Received—The number of octets received by  
the port, including the MAC header and CRC. Octet  
counters are accurate to the nearest 256-byte bound-  
ary.  
Octets Transmitted—The number of octets trans-  
mitted by the port, including the MAC header and  
CRC. Octet counters are accurate to the nearest  
256-byte boundary.  
Clearing Screen Counters  
To make it easier to note the changes in statistic val-  
ues, you can reset the value of statistics shown on the  
screen to zero. Resetting the values shown on the  
screen does not reset the statistic values stored on the  
device.  
Jam Counts—  
Frames Forwarded—The total number of frames  
received by this port and then forwarded to their des-  
tination address.  
Select the CLEAR SCREEN COUNTERS button to reset  
the counters on the screen to zero.  
Cut-thrus Received—The total number of cut-thru  
packets received on the port.  
 
     
SAFETY INFORMATION  
A
You must read the following safety information  
before carrying out any component installation or  
removal, or any maintenance procedures.  
on. It is advisable that the fiber TX port and fiber  
cable ends are never viewed directly when pow-  
ered on.  
This information should be read in conjunction with  
the safety information supplied with the Switch.  
WARNING: Do not remove the downlink module or  
transceiver module blanking plate with the power still  
connected.  
Important Safety Information  
L’information de Sécurité Importante  
WARNING: Warnings contain directions that you  
must follow for your personal safety. Follow all  
instructions carefully.  
ADVERTISSEMENT:Les avertissements contiennent  
les directions que vous devez suivre pour votre sécu-  
rité personnelle. Suivez toutes les directives avec soin.  
Please read the following safety information thor-  
oughly in conjunction with the safety information  
supplied with the Switch before installing the TR-in-FE  
Module.  
Veuillez lire à fond l'information de la sécurité suiva-  
nte avant d'installer le TR-in-FE Module.  
L'installation et l'enlèvement de l'unité doivent  
Installation and removal of the module must be  
être faits seulement par une personnel qualifié.  
carried out by qualified personnel only.  
Cette unité marche sous les conditions SELV  
(Safety Extra Low Voltage) conformément à  
IEC950, ces conditions sont maintenues seulement  
si le matériel auquel elle est branchée, est aussi en  
exploitation sous SELV.  
This module operates under SELV (Safety Extra Low  
Voltage) conditions, according to IEC 950, the con-  
ditions of which are maintained only if the equip-  
ment to which it is installed is also operational  
under SELV.  
La sécurité optique. Il n’y a pas de risques du Trans-  
mit LED, vu sous conditions normales. Cependant  
il est recommandé de ne pas regarder le matériel  
avec l’aide d’une verre grossiant quand il est  
allumé. Il est aussi conseillé que la port marqué  
Optical Safety. Under normal viewing conditions  
there is no hazard from the Transmit LED. It is rec-  
ommended however that the LED is not viewed  
through any magnifying device while it is powered  
 
             
A-2  
APPENDIX A: SAFETY INFORMATION  
Fibre TX et les cables fibre ne soient jamais  
regardés quand l’unité est allumé.  
WARNUNG:Die Austastplatten der Downlink Mod-  
ule- oder Sendeempfänger-Module nicht entfernen,  
solange die Einheit ans Stromnetz angeschlossen ist.  
ADVERTISSEMENT:Ne pas enlever le Module Down-  
link ou la plaque d'occultation de module  
d'émetteur-récepteur avec le courant encore branché.  
Wichtige Sicherheitsinformationen  
WARNUNG: Warnungen enthalten Anweisungen,  
die zur eigenen Sicherheit unbedingt zu beachten  
sind. Bitte befolgen Sie alle Anweisungen sorgfältig  
und genau.  
Bitte unbedingt vor dem Einbauen des TR-in-FE  
Module Einheit die folgenden Sicherheitsanweisun-  
gen durchlesen.  
Ein- und Ausbau des Gerätes ist nur von Fachper-  
sonal vorzunehmen.  
Das Gerät wird mit Sicherheits-Kleinspannung  
nach IEC 950 (SELV = Safety Extra Low Voltage)  
betrieben. Angeschloßen werden können nur  
Geräte, die ebenfalls nach SELV betrieben werden.  
Optische Sicherheitsmassnahmen. Unter normalen  
Umstaenden besteht keine Gefahr durch die sen-  
dende Lumineszenzdiode (LED). Es wird jedoch  
empfohlen diese LED, wenn sie im Betrieb ist, nie-  
mals mittels irgenwelcher Art von Vergroesse-  
rungsgeraeten zu betrachten. Es ist ratsam mit  
dieser Glasfaser Sendeleitung und den Lictwellen-  
leiter Enden keinen direkten Augenkontakt zu  
haben wenn sie im Betrieb sind.  
 
   
SCREEN ACCESS RIGHTS  
B
This appendix lists the security access level for access-  
ing the TR-in-FE Module local management screens,  
and lists the type of action performed for each secu-  
rity level.  
This appendix only covers screens specifically associ-  
ated with TR-in-FE functionality. See the user guide  
which accompanies your SuperStack II Switch for  
additional screen access rights.  
The general actions that can be performed by users  
for each of the security access levels is as follows:  
Security/Specialist - read and write  
Manager - read and write  
Monitor/Secure Monitor - read only  
The following table shows the access rights required  
for each of the ATM screens.  
Screen  
Access level required  
TR-in-FE Port Setup  
Security  
Manager  
Monitor  
TR-in-FE VLAN Setup  
TR-in-FE Port Statistics  
Security  
Manager  
Security  
Manager  
Monitor  
 
         
B-2  
APPENDIX B: SCREEN ACCESS RIGHTS  
 
TR-IN-FE MODULE TECHNICAL SPECIFICATIONS  
C
Environmental Specifications  
TR-in-FE Cable Specification  
The TR-in-FE cable you connect to the TR-in-FE  
Module must conform to the Multi-Mode Fiber  
(MMF-PMD) standard defined by ANSI x.3-166-1992.  
Environmental Requirements  
Operating Temperature  
Operating Humidity  
0 to 50˚ C (32 to 122˚F)  
10 to 95% relative humidity, non-con-  
densing  
3Com supports multi-mode fiber (MMF-PMD)  
62.5/125 mm for full duplex mode. The maximum  
inter-station distance (including device-to-network  
connectors) should not exceed 2 kilometers (1.25  
miles).  
Standards  
EN60068 (IEC68)  
Safety  
Agency Certifications  
UL 1950,  
EN60950,  
For half duplex mode, the cable length should not  
exceed 300 meters.  
CSA 22.2 No. 950,  
ECMA 97  
See the following table for cable specifications:  
Electromagnetic Emissions EN55022 Class B,  
(Agency Certification)  
FCC Part 15 Class A,  
C108.8-M1983 Class A,  
EN 50082-1 (IEC801 Parts 2-5),  
EN60555 Part 2  
Specification  
Core  
Description  
62.5 mm diameter  
Cladding  
125 mm diameter nominal  
122 mm minimum  
128 mm maximum  
Numerical aperture  
0.275  
Maximum attenuation  
11 dB (including 1 db allowed for  
reflection and dispersion penalties)  
Modal bandwidth  
500 MHz.km  
Maximum distance between  
nodes  
2 km (1.25 miles)  
 
                   
C-2  
APPENDIX C: TR-IN-FE MODULE TECHNICAL SPECIFICATIONS  
If you are using equipment at the end of the link from  
a vendor other than 3Com, you must perform a sepa-  
rate loss budget analysis. Contact the vendor(s) for  
values to use in your analysis.  
Specification  
Description  
Output power (from transceiver) -20 dB minimum  
-14 db maximum  
Receiver power  
-31 dB minimum sensitivity  
-14 dB maximum sensitivity  
Does the Cable Provide Sufficient Bandwidth?  
Bandwidth for multi-mode fiber is referred to as  
modal bandwidth because it varies with the modal  
field (or core diameter) of the fiber.  
Maximum attenuation includes attenuation and the  
loss induced by other components such as connec-  
tors, splices, and the mating of unlike fiber types.  
Although some 2 km (1.25 miles) cables have a total  
attenuation of less than 11.0 dB, the 2 km (1.25  
miles) inter-station distance must be maintained to  
comply with modal bandwidth requirements.  
Modal bandwidth is specified in units of MHz.km,  
which indicates the amount of bandwidth supported  
by the fiber for a 1 km (0.625 miles) distance. Your  
cable must have a Modal bandwidth of 500 MHz,  
which allows the cable to support end-to-end band-  
width of 250 MHz at the maximum 2 km (1.25 miles)  
distance.  
The maximum attenuation value in this table is based  
on a cable diameter of 62.5, 80 or 100 mm.  
The following table shows alternative Multi-Mode  
fiber types that can be used.  
To check that the bandwidth of your fiber is within an  
acceptable range:  
1 Divide the amount of bandwidth available according  
to the fiber specification by the total length of fiber  
(km).  
Core (mm)  
Cladding (mm)  
Numerical Aperture  
50  
125  
125  
125  
140  
0.20  
0.22  
0.28  
0.29  
50  
2 If the result is lower than 250 MHz, the link may be  
prone to bit errors. You should shorten the length of  
the fiber or use a different fiber until the result of the  
calculation reaches 250 MHz.  
85  
100  
If you are using fiber with a diameter of 50 mm and  
have 3Com equipment at both ends of the link, sub-  
stitute 8.0 dB for the maximum attenuation. If 3Com  
equipment is only at one end, substitute 6.0 dB for  
the maximum attenuation value.  
Example  
A cable with modal bandwidth of 500 MHz.km will  
have 250 MHz of bandwidth at 2 km (1.25 miles).  
 
   
TR-in-FE Cable Specification  
C-3  
The same cable would have a 500 MHz of bandwidth  
at 1 km (0.625 miles).  
A fiber cable with a bandwidth specification of 200  
MHz.km would have only 100 MHz of bandwidth at  
2 km (1.25 miles), which would not support TR-in-FE.  
In this case, another type of fiber which has a band-  
width of 155 MHz would be required.  
 
C-4  
APPENDIX C: TR-IN-FE MODULE TECHNICAL SPECIFICATIONS  
 
TECHNICAL SUPPORT  
D
Country  
Germany  
Hong Kong  
Italy (fee required)  
Japan  
Data Rate  
Telephone Number  
(49) (89) 627 32 188  
(852) 2537 5608  
Online Technical Services  
up to 28800 bps  
up to 14400 bps  
up to 14400 bps  
up to 14400 bps  
up to 28800 bps  
up to 14400 bps  
up to 14400 bps  
up to 14400 bps  
up to 28800 bps  
up to 28800 bps  
3Com offers worldwide product support seven days a  
week, 24 hours a day, through the following online  
systems:  
(39) (2) 273 00680  
(81) (3) 3345 7266  
(52) (5) 520 7835  
(86) (10) 684 92351  
(65) 534 5693  
3Com Bulletin Board Service (3ComBBS)  
World Wide Web site  
Mexico  
P. R. of China  
Singapore  
Taiwan  
3ComForum on CompuServe®  
3ComFactsSM automated fax service  
(886) (2) 377 5840  
(44) (1442) 278278  
(1) (408) 980 8204  
U.K.  
3Com Bulletin Board Service  
U.S.  
3ComBBS contains patches, software, and drivers for  
all 3Com products, as well as technical articles. This  
service is available via modem or ISDN seven days a  
week, 24 hours a day.  
Access by ISDN  
ISDN users can dial in to 3ComBBS using a digital  
modem for fast access up to 56 Kbps. To access  
3ComBBS using ISDN, dial the following number:  
Access by Modem  
To reach the service by modem, set your modem to 8  
data bits, no parity, and 1 stop bit. Call the telephone  
number nearest you:  
(408) 654 2703  
World Wide Web Site  
Country  
Australia  
Brazil  
Data Rate  
Telephone Number  
(61) (2) 9955 2073  
(55) (11) 547 9666  
(33) (1) 69 86 69 54  
Access the latest networking information on 3Coms  
World Wide Web site by entering our URL into your  
Internet browser:  
up to 14400 bps  
up to 14400 bps  
up to 14400 bps  
France  
 
           
D-2  
APPENDIX D: TECHNICAL SUPPORT  
This service features news and information about  
3Com products, customer service and support,  
3Coms latest news releases, selected articles from  
3TECH (3Coms award-winning technical journal)  
and more.  
Local access numbers are available within the follow-  
ing countries:  
Country Telephone  
Number  
Country  
Telephone  
Number  
Australia 800 123853  
Netherlands  
Norway  
06 0228049  
800 11062  
0505 442607  
956 0815  
3ComForum on CompuServe  
Belgium  
0800 71279  
3ComForum is a CompuServe-based service contain-  
ing patches, software, drivers, and technical articles  
about all 3Com products, as well as a messaging sec-  
tion for peer support. To use 3ComForum, you need a  
CompuServe account.  
Denmark 800 17319  
Portugal  
Finland  
France  
98 001 4444  
05 90 81 58  
Russia  
(Moscow only)  
Spain  
Sweden  
U.K.  
900 964445  
020 792954  
0800 626403  
Germany 0130 8180 63  
Italy 1678 99085  
To use 3ComForum:  
1 Log on to CompuServe.  
2 Enter go threecom.  
Support from Your Network Supplier  
3 Press [Return] to see the 3ComForum main menu.  
If additional assistance is required, contact your net-  
work supplier. Many suppliers are authorized 3Com  
service partners qualified to provide a variety of ser-  
vices, including network planning, installation, hard-  
ware maintenance, application training, and support  
services.  
3ComFacts Automated Fax Service  
3Com Corporations interactive fax service,  
3ComFacts, provides data sheets, technical articles,  
diagrams, and troubleshooting instructions on 3Com  
products 24 hours a day, seven days a week.  
When you contact your network supplier for assis-  
tance, have the following information ready:  
Call 3ComFacts using your touch-tone telephone.  
International access numbers are:  
Diagnostic error messages  
A list of system hardware and software, including  
Country  
Telephone  
Number  
revision levels  
Details about recent configuration changes, if  
U.K.  
U.S.  
(44) (1442) 278279  
(1) (408) 727 7021  
applicable  
 
     
Support from 3Com  
D-3  
If you are unable to contact your network supplier,  
see the following section on how to contact 3Com.  
Country  
Telephone Number  
06 0227788  
*
Netherlands  
*
Norway  
800 11376  
Support from 3Com  
Singapore  
(65) 538 9368  
(27) (11) 807 4397  
900 983125  
If you are unable to receive support from your net-  
work supplier, technical support contracts are avail-  
able from 3Com.  
South Africa  
*
Spain  
*
Sweden  
020 795482  
In the U.S. and Canada, call (800) 876-3266 for cus-  
tomer service.  
Taiwan  
(886) (2) 577 4352  
(971) (4) 349049  
0800 966197  
United Arab Emirates  
U.K.  
If you are outside the U.S. and Canada, contact your  
local 3Com sales office to find your authorized service  
provider:  
U.S.  
(1) (408) 492 1790  
* These numbers are toll-free.  
Country  
Telephone Number  
1 800 678 515  
0800 71429  
Returning Products for Repair  
*
Australia  
A product sent directly to 3Com for repair must first  
be assigned a Return Materials Authorization (RMA)  
number. A product sent to 3Com without an RMA  
number will be returned to the sender unopened, at  
the senders expense.  
*
Belgium  
Brazil  
(55) (11) 546 0869  
(416) 498 3266  
800 17309  
Canada  
*
*
Denmark  
*
Finland  
0800 113153  
05 917959  
To obtain an RMA number, call or fax:  
*
France  
Germany  
0130 821502  
(852) 2501 1111  
1 800 553117  
1678 79489  
Country  
Telephone Number  
Fax Number  
Hong Kong  
U.S. and Canada  
Europe  
(800) 876 3266, option 2  
(408) 764 7120  
*
Ireland  
31 30 60 29900, option 5 (44) (1442) 275822  
(1) (408) 492 1790 (1) (408) 764 7290  
*
Italy  
Outside Europe,  
U.S., and Canada  
Japan  
(81) (3) 3345 7251  
(525) 520 7841  
Mexico  
 
         
D-4  
APPENDIX D: TECHNICAL SUPPORT  
 
1
Blocking 6-2  
Numbers  
F
3Com Bulletin Board Service (3ComBBS) D-1  
3Com sales offices D-3  
3ComFacts D-2  
Fax service. See 3ComFacts  
Forwarding, description of 6-2  
Frames Forwarded, description of 6-3  
Disabled 6-2  
Forwarding 6-2  
Learning 6-2  
3ComForum D-2  
Listening 6-2  
Traffic Statistics 6-3  
Port Statistics (Traffic) 6-3  
Broadcasts Received 6-4  
Cut-thrus Received 6-4  
Errors 6-4  
Frame Size Analysis 6-4  
Frames Forwarded 6-4  
Frames Received 6-4  
Frames Transmitted 6-4  
Multicasts Received 6-4  
Octets Received 6-4  
Octets Transmitted 6-4  
Port ID 6-3  
A
Installing the TR-in-FE Module 3-1  
Automatic logout 4-7  
L
B
Learning, description of 6-2  
LEDs  
Bandwidth  
Calculation C-1  
Summary 3-3  
Blocking, description of 6-2  
BRIDGE SETUP  
Setting Bridge Parameters 5-3  
Broadcast Frame Bandwidth, description  
of 6-3  
Listening, definition of 6-2  
Logging off 4-7  
M
Post installation checks 3-3  
Power supply 3-4  
Bulletin board service D-1  
Manual  
Finding information  
2
C
R
Cables  
N
Returning products for repair D-3  
Technical Specification C-1  
Network supplier support D-2  
Cautions in text  
CompuServe D-2  
2
Notice conventions  
1
Safety information 3-1  
English A-1  
Connections  
O
Troubleshooting 3-5  
On-line technical services D-1  
French A-1  
German A-2  
Conventions in text  
Current Utilization, description of 6-3  
2
Screen access rights B-1  
Statistics  
P
Passwords  
Clearing screen counters 6-4  
Screen map 6-1  
D
Default passwords 4-6  
Port  
Configuration 5-2  
Port Statistics  
Default Users, management console 4-3  
Disabled, description of 6-2  
T
Broadcast Frame Bandwidth 6-3  
Current Utilization 6-3  
Error Frames 6-3  
Frames Forwarded 6-3  
Technical Specifications  
Bandwidth calculation C-2  
Cabling C-1  
E
Environmental Specifications C-1  
Error Frames, description of 6-3  
Environment C-1  
 
2
Terminology  
1
Traffic Statistics, description of 6-3  
TR-in-FE  
Concepts 2-1  
Statistics 6-1  
TR-in-FE Module  
Installing 3-1  
Power supply 3-4  
TR-in-FE Port  
Configuration 5-2  
Troubleshooting  
Using LEDs 3-3  
U
User guide  
Finding information  
Users  
Default users 4-6  
Screen access rights B-1  
2
V
VT100 Console  
Button 4-2  
Choice Field 4-1  
Correcting Text Entries 4-2  
Keyboard Shortcuts 4-2  
List Boxes 4-2  
W
Warnings in text  
2
 
software products will be corrected. For any third-party products listed in the 3Com  
software product documentation or specifications as being compatible, 3Com will  
make reasonable efforts to provide compatibility, except where the noncompatibility  
is caused by a “bug” or defect in the third party’s product.  
3Com Corporation LIMITED WARRANTY  
For purposes of this warranty, the SuperStack II Switch 2000 TR Token  
Ring-in-Fast Ethernet Module is considered a(n) Internetworking product.  
HARDWARE  
STANDARD WARRANTY SERVICE  
3Com warrants its hardware products to be free from defects in workmanship and  
materials, under normal use and service, for the following lengths of time from the  
date of purchase from 3Com or its Authorized Reseller:  
Standard warranty service for hardware products may be obtained by delivering the  
defective product, accompanied by a copy of the dated proof of purchase, to 3Com’s  
Corporate Service Center or to an Authorized 3Com Service Center during the  
applicable warranty period. Standard warranty service for software products may be  
obtained by telephoning 3Com’s Corporate Service Center or an Authorized 3Com  
Service Center, within the warranty period. Products returned to 3Com’s Corporate  
Service Center must be pre-authorized by 3Com with a Return Material Authorization  
(RMA) number marked on the outside of the package, and sent prepaid, insured, and  
packaged appropriately for safe shipment. The repaired or replaced item will be  
shipped to Customer, at 3Com’s expense, not later than thirty (30) days after receipt  
of the defective product by 3Com.  
Internetworking products  
Network adapters  
One year  
Lifetime  
Ethernet stackable hubs and  
Unmanaged Ethernet fixed port repeaters  
Lifetime*  
(One year if not registered)  
*Power supply and fans in the stackable hubs and One year  
unmanaged repeaters  
Other hardware products  
Spare parts and spares kits  
One year  
90 days  
WARRANTIES EXCLUSIVE  
IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER’S  
SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT,  
OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM’S OPTION. TO THE FULL  
EXTENT ALLOWED BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE  
EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, TERMS, OR CONDITIONS,  
EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR  
OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS OF  
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND SATISFACTORY  
QUALITY. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO  
ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE,  
INSTALLATION, MAINTENANCE, OR USE OF ITS PRODUCTS.  
If a product does not operate as warranted above during the applicable warranty  
period, 3Com shall, at its option and expense, repair the defective product or part,  
deliver to Customer an equivalent product or part to replace the defective item, or  
refund to Customer the purchase price paid for the defective product. All products  
that are replaced will become the property of 3Com. Replacement products may be  
new or reconditioned. Any replaced or repaired product or part has a ninety (90) day  
warranty or the remainder of the initial warranty period, whichever is longer.  
3Com shall not be responsible for any software, firmware, information, or memory  
data of Customer contained in, stored on, or integrated with any products returned  
to 3Com for repair, whether under warranty or not.  
3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND  
EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT  
EXIST OR WAS CAUSED BY CUSTOMER’S OR ANY THIRD PERSON’S MISUSE,  
NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO  
REPAIR OR MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED  
USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.  
SOFTWARE  
3Com warrants that the software programs licensed from it will perform in  
substantial conformance to the program specifications therefor for a period of ninety  
(90) days from the date of purchase from 3Com or its Authorized Reseller. 3Com  
warrants the media containing software against failure during the warranty period.  
No updates are provided. 3Com’s sole obligation with respect to this express  
warranty shall be (at 3Com’s discretion) to refund the purchase price paid by  
Customer for any defective software products, or to replace any defective media with  
software which substantially conforms to 3Com’s applicable published specifications.  
Customer assumes responsibility for the selection of the appropriate applications  
program and associated reference materials. 3Com makes no warranty or  
representation that its software products will work in combination with any hardware  
or applications software products provided by third parties, that the operation of the  
software products will be uninterrupted or error free, or that all defects in the  
LIMITATION OF LIABILITY  
TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND  
ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING  
NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE  
DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF  
BUSINESS, LOSS OF INFORMATION OR DATA, OR OTHER FINANCIAL LOSS ARISING  
OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, USE,  
PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF 3COM OR  
ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH  
DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE  
 
 
PURCHASE PRICE PAID, AT 3COM’S OPTION. THIS DISCLAIMER OF LIABILITY FOR  
DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL  
OF ITS ESSENTIAL PURPOSE.  
Some countries, states, or provinces do not allow the exclusion or limitation of  
implied warranties or the limitation of incidental or consequential damages for certain  
products supplied to consumers, so the above limitations and exclusions may be  
limited in their application to you. This warranty gives you specific legal rights which  
may vary depending on local law.  
GOVERNING LAW  
This Limited Warranty shall be governed by the laws of the state of California.  
3Com Corporation, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145 (408)  
764-5000  
8/20/96  
 

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