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3Com COREBUILDER 5000 Quick Start And Reference

CoreBuilder 5000 SwitchModule

Made by: 3Com
Type: Quick Start And Reference
Category: Switch
Pages: 16
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 Part Number 10013592

®

CoreBuilder

®

 

5000 SwitchModule

Quick Start and Reference

1.0

Introduction

The 3Com CoreBuilder

®

5000 SwitchModule is a LAN 

switching module for the CoreBuilder 5000 Integrated 
System Hub. The SwitchModule is available in several 
media configurations and in single-slot and dual-slot 
models.

Before you unpack the SwitchModule, read Section 3.0, 
"Installation Prerequisites" and Section 5.0, "Installation 
Precautions".

WARNING: CoreBuilder 5000 SwitchModules must 
be installed only by trained service personnel.

2.0

Learning About SwitchModules

This document provides the basic information that you 
need to install and configure a 3Com CoreBuilder 5000 
SwitchModule at software Version v3.0.

For more detailed information about using the 
SwitchModule, see the following documents:

CoreBuilder 5000 SwitchModule User Guide 

CoreBuilder 5000 Distributed Management Module 
User Guide
 for software Version v6.00 or later 

CoreBuilder 5000 Distributed Management Module 
Commands Guide
 for software Version v6.00 or later 

You can view these documents online with the 3Com 
DocsOnCD documentation CD-ROM that comes with this 
product. 

To order hard-copy documents, contact your network 
supplier, or call 3Com Corporation at 1-800-724-2447 and 
choose the Customer Operations option.

3.0

Installation Prerequisites

Before you begin the SwitchModule installation process, 
read the hardware and software requirements in this 
section.

In addition to reading this document, be sure to 
read the Release Note for CoreBuilder 5000 
SwitchModules.

3.1

Tools Required

You need a flat-blade screwdriver to install the 
CoreBuilder 5000 SwitchModule in the hub.

3.2

Hardware Prerequisites

Ensure that the CoreBuilder 5000 hub has at least one 

of the following management modules installed:

6000M-MGT Distributed Management Module, 
Version v6.00 or later

6000M-CMGT Advanced DMM/Controller Module, 
Version v6.00 or later

Ensure that the CoreBuilder 5000 hub has the following 

controller module installed: 6000M-RCTL Controller 
Module, Version v1.15 or later

 


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Ensure that the CoreBuilder 5000 hub contains either a 

PacketChannel or a SwitchChannel backplane. 

To verify that the hub has one of these backplanes, 
enter the command SHOW HUB. The model number 
displayed in the Hub Type field should end in C 
(SwitchChannel) or P (PacketChannel), and one of these 
backplanes should be listed under Backplane Type.

For example:

show hub

Hub Information:

Hub Type: 6017C-AC

Backplane Information:

Backplane Type

Revision

--------------

--------

Load-Sharing Power Distribution module

0

Enhanced TriChannel Backplane

1

RingChannel Backplane

0

SwitchChannel Backplane

2

If your hub does not have an installed PacketChannel or 
SwitchChannel backplane and you require 
communication among SwitchModules, contact 3Com 
or your 3Com representative to order a backplane 
upgrade kit. 

Use the following table to determine the slot 

restrictions that apply to your hub configuration: 

If you are installing only one SwitchModule, you can 
install it in any slot, including a reserved ATM slot. The 
single SwitchModule acts as a stand-alone switch.

If your hub does not have an installed PacketChannel or 
SwitchChannel backplane, you can install only one 
SwitchModule per hub.

Backplane Type

 Hub Type

Installation Guideline

PacketChannel

17-Slot

Install SwitchModules in any 
slot.

10-Slot

7-Slot

SwitchChannel 
(PacketChannel 
plus ATM 
Cell-Switching)

17-Slot

Slots 9, 10, 11, and 12 are 
reserved for the 
CoreBuilder

®

5000 ATM 

Switch/Control Point Module 
(Model Number 3C96416SW).

10-Slot

Slots 9 and 10 are reserved for 
the CoreBuilder 5000 ATM 
Switch/Control Point Module 
(Model Number 3C96416SW).

3.3

Software Prerequisites

Before you install a new SwitchModule:

Determine the DMM module’s software version status. 

Enter the SHOW MODULE ALL command. 

show module all

The following display appears:

Slot

Module

Version

Network

General Info

----- -------

-------

-------- -------------

10.01 6100D-MGT

v1.00

ETHERNET_1

11.01 6000M-RCTL

v1.15

N/A

Active

Ctrl Module

12.01 6000M-ARCTL

v1.15

N/A

Stndby Ctrl

Module

12.02 6000M-AMGT

v6.00

N/A

Master Mgmt

Module

Look in the Version column to get the DMM software 

version. The new SwitchModule functions incorrectly if 
the DMM software version is wrong.

As shown in the previous display example, the 
Advanced DMM/Controller (Model 
Number 6000M-CMGT) appears as two modules in the 
same slot (Model Numbers 6000M-ARCTL and 
6000M-AMGT). The DMM operational code version is 
displayed in the Version field of the -AMGT module.

4.0

Crucial Download Procedure

Review the following procedures before you attempt to 
download software to any SwitchModule in your hub. 

You must use the following procedures if you have 
66xx family SwitchModules installed in your hub.

4.1

Download Procedure for SwitchModules 
Earlier than Version v2.02 and DMMs 
Earlier than Version v5.00 

Use the following procedure for all SwitchModules in your 
hub that are earlier than Version v2.02, and DMMs that 
are earlier than Version v5.00. 

CAUTION: All bridge port communication ceases if 
you use an incorrect download procedure to 
upgrade your SwitchModule and Distributed 
Management Module (DMM) and Advanced DMM 
(A/DMM) software. If you use an IP relay for 
connectivity to download code to the DMM, that 
connection also stops. 

 


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For ease of reading and because the DMM and 
A/DMM are basically the same, the term DMM is 
used in this release note to refer to both modules.

CAUTION: Do not upgrade to any later version until 
instructed to do so in Step 5. 

See the CoreBuilder 5000 Distributed Management 
Module User Guide, Chapter 11, for information 
about DMM downloading.

CAUTION: Do not install the new SwitchModules 
yet.

Upgrade all DMMs in the hub to software 

Version v5.00. 

Download SwitchModule boot software Version v1.05 

to all SwitchModules in your hub.

Download SwitchModule software Version v3.00 to all 

SwitchModules in your hub, even if they are already 
running Version v3.00. 

Download ATM Backbone SwitchModule software 

Version v2.05 boot code, and then Version v3.00 
operational code to all ATM Backbone SwitchModules 
in your hub. The Model Number is 3C96602M-MOD.

Upgrade all DMMs in your hub to software Version 

v6.00.

Install the new SwitchModule into your hub. (See 

Section 7.0, "Installing the SwitchModule".) 

Download the Version v3.00 software code to the new 

SwitchModule.

To use the Frame Tagging feature, you must upgrade 
all SwitchModules in the hub to software Version 
v3.00 or later.

4.2

Download Procedure for SwitchModules 
at Version v2.02 or Later and DMMs at 
Version v5.00 or Later

If your hub contains any SwitchModules that are at Version 
v2.02 or later, and DMMs at Version 5.00 or later, 
complete the following download procedure:

CAUTION: Do not install the new SwitchModules 
yet.

Download SwitchModule boot software Version v1.05 

to all SwitchModules in the hub.

Download SwitchModule software Version v3.00 

operational code to all SwitchModules in the hub.

Download ATM SwitchModule software Version v3.00 

operational code to all ATM Backbone SwitchModules 
in the hub. The ATM SwitchModule model number is 
3C96602M-MOD.

Upgrade all DMMs in the hub to software Version 

v6.00.

Install the new SwitchModule into your hub. (See 

Section 7.0, "Installing the SwitchModule".) 

Download the Version v3.00 software code to the new 

SwitchModule.

To use the Frame Tagging feature, you must upgrade 
all SwitchModules in the hub to software Version 
v3.00 or later.

5.0

Installation Precautions

Electrostatic discharge (ESD) can damage static-sensitive 
devices on circuit modules. Follow these precautions:

Do not remove the SwitchModule from its antistatic bag 
until you are ready to inspect or to install it. 

Handle the SwitchModule by the front panel only; do 
not hold it by the component board. 

Use proper grounding techniques when you install the 
SwitchModule. These techniques include using a foot 
strap and a grounded mat, wearing a grounded static 
discharge wrist strap, or touching the metal rack or 
frame just before you handle the SwitchModule.

When you handle CoreBuilder 5000 SwitchModules, 
follow these precautions to avoid component damage:

Do not twist or force the SwitchModule into the hub 
when you insert it into the module guides.

Match the upper and lower module guides while you 
slide the SwitchModule into place.

Do not push the SwitchModule all the way into the hub 
until the SwitchModule ejectors (if any) are open.

WARNING: To ensure optical safety when you install 
10BASE-FB/FL, FDDI, and 100BASE-FX 
SwitchModules, comply with the following 
precaution:

Although the data communication LEDs and Lasers 
used in this product meet the regulatory 
requirements for casual exposure to the eye, as with 
any source of bright light, it is advised that you do 
not look into the light source. 

 


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IEC 825, Class 1 LED Device. For connection only to 
Class 1 LED Devices.

6.0

Unpacking Procedure

Follow this procedure to unpack a SwitchModule: 

Verify that the SwitchModule is the model that you 

ordered by examining the model number on the side of 
the shipping carton. 

Remove the SwitchModule, in its antistatic bag, from 

the shipping carton. 

Following the instructions in Section 5.0, "Installation 

Precautions", remove the SwitchModule from the 
antistatic bag and inspect it for damage.

If the SwitchModule appears to be damaged, return it 
to the antistatic bag, repack it in the shipping carton, 
and contact your local supplier. 

Keep the shipping carton and antistatic bag in which 
your SwitchModule was shipped for future storage or 
shipment. 

Record the serial number of your SwitchModule. Use 

the CoreBuilder 5000 SwitchModule Planning Chart 
that comes with this product.

Ensure that the CoreBuilder 5000 SwitchModule Kit 

contains these items:

CoreBuilder 5000 SwitchModule

Release Note for CoreBuilder 5000 SwitchModules

3Com DocsOnCD documentation CD-ROM (contains 
CoreBuilder 5000 SwitchModule User Guide)

CoreBuilder 5000 SwitchModule Quick Start and 
Reference 
(this guide)

CoreBuilder 5000 SwitchModule Command Reference

CoreBuilder 5000 SwitchModule Planning Chart

CLASS 1

LED PRODUCT

7.0

Installing the SwitchModule

You do not need to turn off the CoreBuilder 5000 hub to 
install

 

or

 

remove

 

the SwitchModule. You can install the 

SwitchModule while the hub is operating (which is called a 
hot swap). 

Before you start the installation process, read 
Section 3.3, "Software Prerequisites," and Section 
5.0, "Installation Precautions".

To install a SwitchModule:

Determine hub power. To ensure that the hub has 

enough power to support the new SwitchModule:

Enter the SHOW POWER BUDGET command to see if 

sufficient wattage is available from the +5 volt, 
–5 volt, and +12 volt supplies.

Using the values in the following table, add up the 

total power requirements for the SwitchModules that 
you plan to install:

Power Requirement at

Model Number

+5 Volts

–5 Volts

+12 Volts

3C96618M-TX-A

52 W

0.5 W

0.25 Watts 
for all 
modules

3c96620M-TP-A

25 W

0.5 W

3C96612M-TP-A

23 W

0.5 W

3C96624M-TP-A

30 W

0.5 W

3C96624M-TPL-A

25 W

0.5 W

3C96616M-BTP-A

35 W

1.0 W

3C96610M-F-A

33 W

0.5 W

3C96620M-F-A

50 W

0.5 W

3C96614M-FTP-A

30 W

0.5 W

3C96612M-FF-A

40 W

0.5 W

3C96604M-F-A

31 W

0.5 W

3C96612M-FC-A

57 W

0.5 W

3C96604M-TX-A

34 W

0.5 W

3C96604M-FX-A

35 W

0.5 W

 


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The total watts that are available in the hub (from 

step a) must be greater than the total watts that are 
required by the SwitchModules (from step b). Use the 
following worksheet to calculate power 
consumption:

To expose slots for SwitchModule installation, remove 

as many blank faceplates from the chassis as required. 

WARNING: Hazardous energy levels exist inside of 
the hub. Do not place hands or objects into the hub 
or touch components on an inserted module.

Insert each SwitchModule into the module guides at the 

top and bottom of the selected slot and slide it into the 
chassis by pressing firmly at the top and bottom of the 
front panel (see the figure at right).

Lock the SwitchModules into place by applying pressure 

to the front panel with one hand while you close each 
ejector handle. Ensure that the SwitchModule remains 
fully seated in the backplane connector while you close 
the ejector handles. 

To secure the SwitchModule front panel to the front of 

the chassis, use a flat-blade screwdriver to tighten the 
top and bottom screws to torque specification 
3 to 5 inch pounds. Do not overtighten.

WARNING: For safety reasons and to ensure 
adequate cooling airflow, install blank faceplates 
over all empty slots.

Voltage 

Category

 Watts 

Available 

in Hub

 Watts 

Required by 

SwitchModule

=

 Watts 

Remaining

+5

=

–5

=

+12

=

To ensure that the DMM recognizes the installed 

SwitchModule, enter the SHOW MODULE ALL 
command. Verify that the model number of the 
SwitchModule appears in the correct slot.

There may be a delay (no more than 30 seconds) before 
the DMM recognizes the SwitchModule.

Ensure that the hub is operating with enough power by 

entering the SHOW POWER BUDGET command.

Slide the 
SwitchModule into the 
selected slot as shown here.

 


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8.0

Basic Configuration Steps

This section uses network configuration examples to 
introduce important concepts about implementing 
CoreBuilder 5000 SwitchModules in your network. Your 
network configuration may be more or less complex than 
the network configuration examples that are shown here.

8.1

Default Configuration After Installation

After you install one or more SwitchModule into the 
CoreBuilder 5000 hub, the default configuration is as 
follows:

All SwitchModule ports are assigned to virtual bridge 1. 
This assignment means that all SwitchModule ports can 
communicate with all other SwitchModule ports, 
regardless of the slot in which they reside, and subject 
to the slot restrictions that are described in Section 3.2, 
step 4.

All SwitchModule ports are automatically connected to 
the switching backplane in the hub (either 
PacketChannel or PacketChannel with Cell-Switching). 
You do not need to enter a command to assign ports to 
the backplane, as other CoreBuilder 5000 media 
modules may require.

Ethernet Backplane SwitchModule backplane ports 
(ports 17 through 24) are permanently connected to 
shared Ethernet backplanes 1 through 8. 

All SwitchModule ports (except Ethernet Backplane 
SwitchModule backplane ports 17 through 24) are 
enabled and capable of switching traffic if you attach 
devices to the ports. You must enable Ethernet 
Backplane SwitchModule ports 17 through 24 using the 
DMM command SET BPORT_MAU MODE ENABLE or 
SET PORT MODE ENABLE. For information about the 
special port numbering system that applies to these 
ports, see Chapter 4 in the CoreBuilder 5000 
SwitchModule User Guide
.

The Spanning Tree Protocol is enabled on virtual 
bridge 1 and on all SwitchModule ports. Spanning Tree 
parameters are set to their default settings, which are 
described in Chapter 7 in the CoreBuilder 5000 
SwitchModule User Guide
.

Frame Tagging is disabled. For more information about 
frame tagging, see Chapter 8 in the CoreBuilder 5000 
SwitchModule User Guide
.

The maximum vbridge value is set to 32, which means 
that you can assign ports to virtual bridges 1 through 
32. To change this value, see Chapter 2 in the 
CoreBuilder 5000 SwitchModule User Guide.

The following figure shows the default configuration 
with three SwitchModules installed in the hub:

8.2

Enabling SNMP Management Through the 
SwitchModule

Configure IP settings for a virtual bridge only if the DMM 
has no other means of IP connectivity. 

For example, you do not need to configure IP settings if 
the hub contains an Ethernet media module with a 
network monitor card (NMC) attached to it. The NMC 
provides connectivity between SwitchModules and the 
DMM.

If you do not already have an in-band connection to the 
DMM, and you want to manage the hub from a network 
management station (NMS) that is connected to a 
SwitchModule port, use the instructions in this section.

CAUTION: Although the DMM supports multiple 
IP addresses, enable the interface for only one 
address per subnet (on the network that is attached 
to your default gateway). Enabling multiple 
IP interfaces on the same subnet may cause 
connectivity problems. 

When a model A SwitchModule (the model number 
ends in -A) is installed in the hub, include at least 
one of its ports in the virtual bridge that is acting as 
the IP relay interface. For example, if there are five 
virtual bridges, and if you are managing the hub 
through virtual bridge 1, ensure that virtual bridge 1 
includes at least one of the model A SwitchModule’s 
ports.

Virtual bridge 1

SwitchModules in
slots 2, 3, and 4

DMM in

slot 1

 


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The following figure shows the hub configured with a 
network management station on the LAN that is attached 
to SwitchModule port 2.6:

To manage the hub from the network management station 
in the previous figure:

Configure IP settings for virtual bridge 1 using the 

commands in the following example (values shown are 
sample values):

> set ip subnet_mask ff.ff.ff.00 vbridge 1

set ip ip_address 141.102.3.131 vbridge 1

>

 

set

 

ip default_gateway

 

141.102.3.2

 

vbridge 1

Assigning an IP address to a virtual bridge automatically 
enables the virtual bridge interface to the DMM.

Save the settings as follows:

save ip

You can now access the DMM from the network 
management station. You can also send SNMP and RMON 
requests to the DMM. From the DMM, you can manage 
any network, virtual bridge, or module in the 
CoreBuilder 5000 hub. 

If you have multiple subnetworks in your network, and 
you want to manage the hub in-band from each 
subnetwork, you must configure IP settings for each 
subnetwork. 

If you already have an in-band connection to the DMM 
and if you still want to add in-band connectivity through a 
SwitchModule port, do one of the following:

Before you establish an in-band DMM interface through 
the SwitchModule, assign the virtual bridge an IP 
address that is on a unique subnetwork.

Disable the existing in-band DMM interface.

SwitchModules in
slots 2, 3, and 4

NMS

LAN

DMM in
slot 1

For more information about IP configuration, see the 
CoreBuilder 5000 SwitchModule User Guide on the 
DocsOnCD documentation CD-ROM that comes with this 
product.

8.3

Creating an Additional Virtual Bridge

A virtual bridge is a user-defined group of SwitchModule 
ports. This group of ports operates as a single logical 
bridge. 

You can segment your network into more than one virtual 
bridge by creating new virtual bridges. You can assign any 
port on any SwitchModule to the new virtual bridge. 

The following figure shows a SwitchModule network that 
is configured with two virtual bridges:

To create the configuration in this figure:

Enter the commands in the following example (values 

shown are sample values): 

set bridge_port 3.1 vbridge 2

set bridge_port 3.2 vbridge 2

set bridge_port 4.all vbridge 2

Save the settings as follows:

save all

The new network configuration consists of two separate 
virtual bridges. Each virtual bridge maintains a separate 
Spanning Tree configuration. All ports on virtual bridge 2 
are enabled by default.

The two virtual bridges that are described in this example 
cannot send traffic to one another at this point without an 
external connection. (See Section 8.4.) However, you can 
manage all ports on both virtual bridges using the DMM or 
other supported network management software, such as 
3Com Transcend

®

 Network Control Services.

SwitchModules in
slots 2, 3, and 4

NMS

LAN

DMM in
slot 1

Virtual bridge 1
Virtual bridge 2

 


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8.4

Enabling Communication Between 
Virtual Bridges

You can enable communication between virtual bridges by 
connecting ports on different virtual bridges through a 
front panel, through other physical connections (such as a 
router), crossover cables, or, if an Ethernet Backplane 
SwitchModule is installed in the hub, between virtual 
bridges over the CoreBuilder 5000 shared Ethernet 
backplane. For more information, see the 
CoreBuilder 5000 SwitchModule User Guide.

The following figure shows two virtual bridges that 
connect through a router:

Virtual bridge 1 and virtual bridge 2 can forward traffic to 
each other through the physical router connection 
between ports 2.2 and 3.2. 

SwitchModules in
slots 2, 3, and 4

NMS

LAN

Router

9.0

Finding More Information

This section describes locations of further configuration 
information in the CoreBuilder 5000 SwitchModule User 
Guide
, which is located on the 3Com DocsOnCD 
documentation CD-ROM that comes with this product.

You can also use a network management 
application, such as 3Com Transcend Network 
Control Services, to further configure 
SwitchModules. See the appropriate network 
management documentation.

Management Task

User Guide 

Reference

Configure virtual bridges

Chapter 2

Configure SwitchModule memory resources

Configure the address aging interval

Hot-swap a SwitchModule

Configure IP settings for SNMP management

Chapter 3

Enable and disable ports

Chapter 4

Configure media-specific port parameters, 
including PACE

®

Create filters according to packet destination 
address

Chapter 5

Configure source checking

Create protocol filters and broadcast thresholds

Change default translation settings for 
networks that run Raw 802.3 IPX protocol over 
a Novell

 

platform

Monitor network traffic using RMON and roving 
analysis port

Chapter 6

Monitor network traffic using DMM commands 
and supported statistics

Manage SwitchModules using SNMP requests

Manage the Spanning Tree configuration on 
your network

Chapter 7

Enable Frame Tagging

Chapter 8

Enable IGMP Snooping

Chapter 9

Troubleshoot SwitchModules

Chapter 10

Specifications

Appendix A

Designate the Network

Appendix B

Technical Support 

Appendix C

 


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10.0

Common Front Panel Features

This section describes front panel features that all 
SwitchModules have in common, regardless of technology 
type and configuration. The figure to the right shows the 
common SwitchModule front panel features.

10.1 LEDs

SwitchModule front panels are equipped with LEDs that 
provide information about module status and traffic 
activity on the backplane.

10.2 Reset Button

Press the Reset button only if you suspect a problem with 
the SwitchModule. Resetting disrupts network traffic and 
affects the Spanning Tree topology. To press the Reset 
button, use a pen tip or other nonmetallic tool.

LED

State

Indicates

Module Status 
(MOD STAT) 

Green
On

SwitchModule powered on OK.

Off

SwitchModule has failed.

Yellow 
On

SwitchModule is running self-test 
diagnostics.

Yellow 
Blinking

SwitchModule has failed 
self-diagnostics.

PacketChannel 
Status 

Green 
On

SwitchModule is correctly 
inserted in chassis and connected 
to the PacketChannel backplane.

Off

SwitchModule is not connected 
to the PacketChannel backplane 
or was inserted in slots 9 — 12 
(17-slot hub) or 9 and 10 (10-slot 
hub), which are reserved for the 
ATM Switch/Control Point 
module.

Yellow 
On

SwitchModule is transmitting 
heavy traffic levels to the 
PacketChannel backplane.

Yellow 
Blinking

SwitchModule is transmitting 
normal traffic levels to the 
PacketChannel backplane.

10.3 Ports

SwitchModule port types vary depending on media type 
and configuration. The following sections describe the 
port types, along with descriptions of the other front panel 
components of each SwitchModule.

11.0

10BASE-T SwitchModule Front Panel 
Features

This section describes the front panel features that are 
unique to these 10BASE-T SwitchModules:

12-Port 10BASE-T SwitchModule

20-Port 10BASE-T SwitchModule

24-Port 10BASE-T SwitchModule

24-Port Ethernet Telco SwitchModule

See Section 10.0, "Common Front Panel Features" for a 
description of the PacketChannel LED, Module Status LED, 
and Reset button.

PA

CKETCHANNEL

MOD ST

AT

RESET

Ports differ in type and
number. This example
shows RJ-45 ports.

Model Number
location

XXXX

 


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11.1 LEDs

The following table explains the 10BASE-T port status or 
activity LED blink sequences:

Port Status or Activity 

LED State

Indicates

Green

On

Port is enabled and link is OK.

Blinking

Link failure or waiting for network 
connection.

Off

Port or port functions are disabled.

Yellow

On

Heavy traffic activity on the port.

Blinking

Normal traffic activity on the port.

11.2 Ports

10BASE-T SwitchModules use the following port types:

The 12-Port, 20-Port, and 24-Port 10BASE-T 
SwitchModules use crossover ports with 
RJ-45 connectors. 

CoreBuilder 5000 10BASE-T modules use crossover 
ports. This means that if you connect a 10BASE-T 
SwitchModule port to another CoreBuilder 5000 
10BASE-T module port, you must use a crossover 
cable.

The Ethernet Telco SwitchModule uses two standard 
female Telco connectors with 12 ports per connector for a 
total of 24 ports.

The following illustrations show these SwitchModules. The 
X that follows the port numbers indicates a crossover port.

Port Status/Activity
LEDs

24-Port 10BASE-T

SwitchModule

Model Number

3C96624M-TP-A

6624M-TP-A

4X

1X

3

4

2X

3X

5

6

7

8

1

2

9

10

11

12

5X

6X

7X

8X

9X

10X

11X

12X

16X

13X

15

16

14X

15X

17

18

19

20

13

14

21

22

23

24

17X

18X

19X

20X

21X

22X

23X

24X

Port Status/Activity
LEDs

24-Port Ethernet

Telco SwitchModule

Model Number

3C96624M-TPL-A

6624M-TPL-A

1X-12X

4

6

8

2

10
12

16

18

20

14

22
24

3

5

7

1

9

11

15

17

19

13

21
23

13X-24X

Standard female
Telco connectors

12-Port 10BASE-T

SwitchModule

Model Number

3C96612M-TP-A

6612M-TP-A

4X

1X

3

4

2X

3X

5

6

7

8

1

2

9

10

11

12

5X

6X

7X

8X

9X

10X

11X

12X

4X

1X

3

4

2X

3X

5

6

7

8

1

2

9

10

11

12

5X

6X

7X

8X

9X

10X

11X

12X

RJ-45 connectors

20-Port

10BASE-T

SwitchModule

Model Number

3C96620M-TP-A

PACK

ETCH

ANN

EL

MOD

 STAT

RESE

T

10
13
16
19

1
4
7

1X

2X

3X

4X

5X

6X

7X

8X

9X

10

X

11X

12

X

13X

14X

15X

16

X

17X

18

X

19X

20

X

6620M-TP-A

 


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12.0

Ethernet Backplane SwitchModule 
Front Panel Features

This section describes the front panel features that are 
unique to the Ethernet Backplane SwitchModule. See 
Section 10.0, "Common Front Panel Features" for a 
description of the PacketChannel LED, Module Status LED, 
and Reset button.

12.1 LEDs

The following table explains the Ethernet Backplane 
SwitchModule port status or activity LED blink sequences:

12.2 Ports

The Ethernet Backplane SwitchModule front panel ports 
use crossover ports with RJ-45 connectors (see the figure 
at right). The X that follows the port number indicates a 
crossover port.

CoreBuilder 5000 10BASE-T modules use crossover ports. 
This means that if you connect a 10BASE-T SwitchModule 
port to another CoreBuilder 5000 10BASE-T module port, 
you must use a crossover cable

Port Status or Activity 

LED State

Indicates

Green

On

Port is enabled and link is OK.

Blinking

Link failure or waiting for network 
connection.

Off

Port or port functions are disabled.

Yellow

On

Heavy traffic activity on the port.

Blinking

Normal traffic activity on the port.

6616M-BTP-A

4X

1X

3

4

2X

3X

5

6

7

8

1

2

9

10

11

12

5X

6X

7X

8X

9X

10X

11X

12X

10BASE-T Port Status/Activity LEDs

15

16

17

18

19

20

13

14

21

22

23

24

Ethernet Backplane Port

Status/Activity LEDs

16X

13X

14X

15X

16-Port Ethernet

Backplane SwitchModule

Model Number 3C96616M-BTP-A

RJ-45
connectors

 


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13.0

10BASE-FB/FL SwitchModule Front 
Panel Features

This section describes the front panel features that are 
unique to the 10BASE-FB/FL SwitchModule. See Section 
10.0, "Common Front Panel Features" for a description of 
the PacketChannel LED, Module Status LED, and Reset 
button.

13.1 LEDs

The following table explains the 10BASE-FB/FL port status 
or activity LED blink sequences: 

13.2 Ports

10BASE-FB/FL SwitchModules use ST connectors (see the 
figures at right). 

Port Status or Activity 

LED State

Indicates

Green

On

Port is enabled and link is OK.

1 Blink

No light on receive fiber.

2 Blinks

Port received jabber.

3 Blinks

Port is partitioned.

4 Blinks

Remote fault.

Off

Port or port functions are disabled.

Yellow

On

Heavy traffic activity on the port.

Blinking

Normal traffic activity on the port.

6620M-F-A

Port
Status/Activity LEDs

20-Port 10BASE-FB/FL

SwitchModule

Model Number

3C96620M-F-A

6610M-F-A

10-Port 10BASE-FB/FL

SwitchModule

Model Number

3C96610M-F-A

ST
connectors

1

2

3

4

5

6

7

8

9

10

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

2

1

6

8

5

7

10

9

4

3

1

2

3

4

5

6

7

8

9

10

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

2

1

6

8

5

7

10

9

4

3

12

11

16

18

15

17

20

19

14

13

11

12

13

14

15

16

17

18

19

20

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

RX

TX

 


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14.0

Mixed Technology SwitchModule 
Front Panel Features

This section describes the Fiber Distributed Date Interface 
(FDDI) ports and LEDs on the front panel of the following 
SwitchModules:

10BASE-T and FDDI Mixed Technology SwitchModule

10BASE-FB/FL and FDDI Mixed Technology 
SwitchModule

Section 11.0, "10BASE-T SwitchModule Front Panel 
Features", and Section 13.0, "10BASE-FB/FL 
SwitchModule Front Panel Features" describe the 
10BASE-T and 10BASE-FB/FL ports, respectively. Section 
10.0, "Common Front Panel Features" describes the 
PacketChannel and Module Status LEDs, and Reset button.

14.1 LEDs

FDDI LEDs are green only (not yellow). The following table 
explains the FDDI port status LED blink sequences and the 
10BASE-T and 10BASE-FB/FL port status or activity LED 
blink sequences: 

LED State

Indicates

FDDI Port 

Green On Port is enabled and ring is 

operational.

Green 
Blinking

Port is connecting.

Off

Port or port functions are 
disabled.

10BASE-T Port 

Green On Port is enabled and link is OK.

Green 
Blinking

Link failure or waiting for 
network connection.

Off

Port or port functions are 
disabled.

Yellow 
On

Heavy port traffic activity.

Yellow 
Blinking

Normal port traffic activity.

10BASE-FB/FL Port  Green On Port is enabled and link is OK.

Green 
1 Blink

No light on receive fiber.

Green 
2 Blinks

Port received jabber.

Green 
3 Blinks

Port is partitioned.

Green 
4 Blinks

Remote fault.

Off

Port or port functions are 
disabled.

Yellow 
On

Heavy port traffic activity.

Yellow 
Blinking

Normal port traffic activity.

14.2 Ports

FDDI ports on mixed technology SwitchModules are Dual 
Attach Station (DAS) (A/B) ports that use MIC connectors. 

14.3 Optical Bypass Connector

FDDI SwitchModules support one optical bypass connector 
per DAS port. Use the optical bypass connector to preserve 
a dual FDDI ring in the event of a station failure. The 
optical bypass connector accepts an optical bypass switch 
of type AMP FOTP-34 Method B using a mini-DIN 
connector.

6614M-FTP-A

10BASE-T and FDDI

SwitchModule

Model Number

3C96614M-FTP-A

6612M-FF-A

10BASE-FB/FL and FDDI

SwitchModule

Model Number

3C96612M-FF-A

OPTICAL

BYPASS

A

B

OPTICAL

BYPASS

A

B

B

A

B

A

MIC
connectors

FDDI Port Status
LEDs

 


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15.0

FDDI SwitchModules Front Panel 
Features

This section describes the FDDI ports and LEDs on the 
following SwitchModules:

2-Port FDDI SwitchModule

12-Port FDDI Concentrator SwitchModule

See Section 10.0 for a description of the PacketChannel 
LED, Module Status LED, and Reset button.

15.1 LEDs

FDDI LEDs are green only (not yellow). The following table 
explains the FDDI port status LED blink sequences:

15.2 Ports

FDDI SwitchModules support the following port 
configurations:

2-Port FDDI SwitchModule — Supports 2 DAS (A/B) 
ports with MIC connectors.

12-Port FDDI Concentrator SwitchModule — Supports 
2 DAS (A/B) ports and 8 Master (M) ports with 
MIC connectors. Each side of the FDDI Concentrator 
SwitchModule is a Dual Attachment Concentrator 
(DAC), which is composed of 4 M ports and an A and B 
port pair that is connected to a single MAC. 

15.3 Optical Bypass Connector

FDDI SwitchModules support one optical bypass connector 
per port. Use the optical bypass connector to preserve a 
dual FDDI ring in the event of a station failure. The optical 
bypass connector accepts an optical bypass switch of type 
AMP FOTP-34 Method B using a mini-DIN connector.

Port Status LED State

Indicates

Green On

Port is enabled and ring is operational.

Green Blinking

Port is connecting.

Off

Port or port functions are disabled.

FDDI Port Status LEDs

12-Port FDDI

Concentrator

SwitchModule

Model Number

3C96612M-FC-A

2-Port FDDI

SwitchModule

Model Number

3C96604M-F-A

MIC
connectors

6604M-F-A

1B

2B

1A

2A

1A

1B

OPTICAL

BYPASS 2

OPTICAL

BYPASS 1

2A

2B

6612M-FC-A

1M

3M

2M

4M

1B

2B

2M

4M

2A

1M

3M

OPTICAL

BYPASS

OPTICAL

BYPASS

1A

1A

1B

2A

2B

2-

1M

2-

2M

1-

1M

1-

2M

2-

3M

2-

4M

1-

3M

1-

4M

 


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15

16.0

Fast Ethernet SwitchModule Front 
Panel Features

This section describes the front panel features that are 
unique to the Fast Ethernet SwitchModules. See 
Section 10.0 for a description of the PacketChannel LED, 
Module Status LED, and the Reset button.

16.1 LEDs

The following table explains the Fast Ethernet port status 
or activity LED blink sequences:

16.2 Ports

The 100BASE-TX SwitchModule uses crossover ports with 
RJ-45 connectors. The X that follows the port number on 
the SwitchModule indicates a crossover port.

CoreBuilder 5000 100BASE-T modules use crossover 
ports. This means that if you connect a 100BASE-T 
SwitchModule port to another CoreBuilder 5000 
100BASE-T module port, you must use a crossover 
cable.

LED State

Indicates

Port Status or 
Activity

(One per Port)

Green On

Port is enabled and link is OK.

Green 
1 Blink

Link failure.

Green 
4 Blinks

Remote link failure.

Off

Port or port functions are 
disabled.

Yellow On

Heavy traffic activity on the port.

Yellow 
Blinking

Normal traffic activity on the 
port.

Full-Duplex

(Not found on 
the 6618M-TX) 

Green On

Port is in full duplex mode.

Green 
Blinking

Autonegotiation is determining 
the correct duplex setting.

Off

Port is in half-duplex mode.

Copyright © 3Com Corporation, 2000. All rights reserved.
3Com, the 3Com logo, CoreBuilder, PACE, and Transcend are registered trademarks of 3Com Corporation.
ONline and TriChannel are trademarks of 3Com Corporation.
Windows is a registered trademark of Microsoft Corporation.
UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company, Ltd.
All other company and product names may be trademarks of the companies with which they are associated.

The 100BASE-FX SwitchModule uses SC connectors. See 
the following figures.

6604M-TX-A

4X

3X

2X

1X

STATUS

1

2

3

4

FULL DPLX

RJ-45

connectors

Port Status/Activity and

Full-Duplex Status LEDs

1

2

3

4

RX

TX

RX

TX

RX

TX

RX

TX

6604M-FX-A

STATUS

FULL DPLX

1

2

3

4

SC

connectors

100BASE-TX

SwitchModule

Model Number

3C96604M-TX-A

100BASE-FX

SwitchModule

Model Number

3C96604M-FX-A

100BASE-TX

SwitchModule

Model Number
3C96618M-TX

PACKETCHANNEL
MOD ST

AT

RESET

2.2

2.4
3.2
3.4

1.2
1.4
1.6

4.2
4.4

2.1

2.3
3.1
3.3

1.1
1.3
1.5

4.1
4.3

1.1X

1.2X

1.3X

1.4X

1.5X

1.6X

2.1X

2.2X

2.3X

2.4X

3.1X

3.2X

3.3X

3.4X

4.1X

4.2X

4.3X

4.4X

6618M-TX-A

 


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3Com Corporation L

IMITED

 W

ARRANTY

CoreBuilder

®

 5000 SwitchModule

H

ARDWARE

3Com warrants to the end user (“Customer”) that this hardware product will 
be free from defects in workmanship and materials, under normal use and 
service, for one (1) year from the date of purchase from 3Com or its authorized 
reseller.

3Com’s sole obligation under this express warranty shall be, at 3Com’s option 
and expense, to repair the defective product or part, deliver to Customer an 
equivalent product or part to replace the defective item, or if neither of the 
two foregoing options is reasonably available, 3Com may, in its sole discretion, 
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. 3Com warrants any replaced or 
repaired product or part for ninety (90) days from shipment, or the remainder 
of the initial warranty period, whichever is longer.

S

OFTWARE

3Com warrants to Customer that each software program licensed from it will 
perform in substantial conformance to its program specifications, 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 under 
this express warranty shall be, at 3Com's option and expense, to refund the 
purchase price paid by Customer for any defective software product, or to 
replace any defective media with software which substantially conforms to 
applicable 3Com 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 meet Customer’s requirements or 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 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 non-compatibility is caused by a “bug” or 
defect in the third party's product or from use of the software product not in 
accordance with 3Com’s published specifications or user manual.

THIS 3COM PRODUCT MAY INCLUDE OR BE BUNDLED WITH THIRD-PARTY 
SOFTWARE, THE USE OF WHICH IS GOVERNED BY A SEPARATE END USER 
LICENSE AGREEMENT. THIS 3COM WARRANTY DOES NOT APPLY TO SUCH 
THIRD-PARTY SOFTWARE. FOR THE APPLICABLE WARRANTY, PLEASE REFER 
TO THE END USER LICENSE AGREEMENT GOVERNING THE USE OF SUCH 
SOFTWARE.

Y

EAR

 2000 W

ARRANTY

See the 3Com Year 2000 Web site at 
http://www.3com.com/products/yr2000.html

O

BTAINING

 W

ARRANTY

 S

ERVICE

Customer must contact a 3Com Corporate Service Center or an Authorized 
3Com Service Center within the applicable warranty period to obtain warranty 
service authorization.  Dated proof of purchase from 3Com or its authorized 
reseller may be required.  Products returned to 3Com's Corporate Service 
Center must be pre-authorized by 3Com with a Return Material Authorization 
(RMA) number or User Service Order (USO) number marked on the outside of 
the package, and sent prepaid and packaged appropriately for safe shipment, 
and it is recommended that they be insured or sent by a method that provides 
for tracking of the package.  Responsibility for loss or damage does not 
transfer to 3Com until the returned item is received by 3Com. The repaired or 
replaced item will be shipped to Customer, at 3Com's expense, not later than 
thirty (30) days after 3Com receives the defective product.

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. Dead- 
or Defective-on-Arrival
.  In the event a product completely fails to function or 
exhibits a defect in materials or workmanship within the first forty-eight (48) 
hours of installation but no later than thirty (30) days after the date of 
purchase, and this is verified by 3Com, it will be considered dead- or 
defective-on-arrival (DOA) and a replacement shall be provided by advance 
replacement.

The replacement product will normally be shipped not later than three (3) 
business days after 3Com’s verification of the DOA product, but may be 
delayed due to export or import procedures.  The shipment of advance 
replacement products is subject to local legal requirements and may not be 
available in all locations. When an advance replacement is provided and 
Customer fails to return the original product to 3Com within fifteen (15) days 
after shipment of the replacement, 3Com will charge Customer for the 
replacement product, at list price.

INCLUDED SERVICES: 

Telephone Support, with coverage for basic troubleshooting only, will be 
provided for ninety (90) days from the date of purchase, on a commercially 
reasonable efforts basis. Please refer to the Technical Support appendix in the 
Getting Started Guide for telephone numbers.

3Com’s Web and Bulletin Board Services provide 3Knowledgebase, bug 
tracking, documentation, release notes, and some software maintenance 
releases at no charge.

W

ARRANTIES

 E

XCLUSIVE

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, SATISFACTORY QUALITY, CORRESPONDENCE WITH 
DESCRIPTION, AND NON-INFRINGEMENT, ALL OF WHICH ARE EXPRESSLY 
DISCLAIMED.  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.

3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND 
EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT OR MALFUNCTION 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 OPEN, REPAIR OR MODIFY THE PRODUCT, OR 
ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY 
ACCIDENT, FIRE, LIGHTNING, POWER CUTS OR OUTAGES, OTHER HAZARDS, 
OR ACTS OF GOD.

L

IMITATION

 

OF

 L

IABILITY

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.

D

ISCLAIMER

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, or the limitation of liability for 
personal injury, so the above limitations and exclusions may be limited in their 
application to you.  When the implied warranties are not allowed to be 
excluded in their entirety, they will be limited to the duration of the applicable 
written warranty.  This warranty gives you specific legal rights which may vary 
depending on local law.

G

OVERNING

 L

AW

This Limited Warranty shall be governed by the laws of the State of California, 
U.S.A., excluding its conflicts of laws principles and excluding the United 
Nations Convention on Contracts for the International Sale of Goods.

3Com Corporation
5400 Bayfront Plaza
P.O. Box 58145
Santa Clara, CA  95052-8145
(408) 326-5000