3Com 3C63100-AC-C - PathBuilder S600... User manual

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¨
PathBuilder
®
S600
WAN Access Switch Reference Guide
Release 2.02
Part No.3C63917
010-11582-3005
Published July 1998

3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
© 3Com Corporation, 1998. All rights reserved. No part of this documentation may be reproduced in any
form or by any means or used to make any derivative work (such as translation, transformation, or
adaptation) without permission from 3Com Corporation.
3Com Corporation reserves the right to revise this documentation and to make changes in content from
time to time without obligation on the part of 3Com Corporation to provide notification of such revision or
change.
3Com Corporation provides this documentation without warranty of any kind, either implied or expressed,
including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
3Com may make improvements or changes in the product(s) and/or the program(s) described in this
documentation at any time.
UNITED STATES GOVERNMENT LEGENDS:
If you are a United States government agency, then this documentation and the software described herein
are provided to you subject to the following restricted rights:
For units of the Department of Defense:
Restricted Rights Legend: Use, duplication, or disclosure by the Government is subject to restrictions as set
forth in subparagraph (c) (1) (ii) for Restricted Rights in Technical Data and Computer Software Clause at 48
C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara, California 95052-8145.
For civilian agencies:
Restricted Rights Legend: Use, reproduction, or disclosure is subject to restrictions set forth in subparagraph
(a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and
the limitations set forth in 3Com Corporation’s standard commercial agreement for the software.
Unpublished rights reserved under the copyright laws of the United States.
If there is any software on removable media described in this documentation, it is furnished under a license
agreement included with the product as a separate document, in the hard copy documentation, or on the
removable media in a directory file named LICENSE.TXT. If you are unable to locate a copy, please contact
3Com and a copy will be provided to you.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may
not be registered in other countries.
3Com and PathBuilder are trademarks of 3Com Corporation.
Other brand and product names may be registered trademarks or trademarks of their respective holders.

C
ONTENTS
W
ARNING
I
NFORMATION
Servicing ix
Rack Mounting ix
Power and Power Cords ix
EMI x
Safety Classification of Ports for Connection to Telecommunications Networks x
S
UPPLEMENTARY
R
EGULATORY
I
NFORMATION
Host Chassis/Module Compatibility and Creepage/Clearance Requirements xi
FCC Part 68 Statement xii
CE Notice xiii
A
BOUT THIS
G
UIDE
Introduction 15
How to Use This Guide 15
Conventions 16
Related Documentation 17
1
S
YSTEM
D
ESCRIPTION
ATM Overview 19
Virtual Circuits 19
PathBuilder S600 with STX Overview 20
PathBuilder S600 STX Architecture 20
Key Features of the STX Module 21
Specifications 22
Options and Parts List 26
2
I
NSTALLATION
Receiving and Inspecting the PathBuilder S600 29
Installation Overview 29
Site Requirements 30
Step 1: Install the Shelf in the Rack 30
Step 2: Connect AC or DC Power 31
Step 3: (If needed) Install Additional Modules in the Shelf 32
Step 4: Connect I/O Cabling and Wiring 33
Normal Start up Sequence 34

Connecting a DS3 UNI Module 34
Connecting an E3 UNI Module 36
Connecting an OC3/STM-1 UNI Trunk/Port Module 37
Connecting a DS1/E1 UNI with IMA Module 37
Connecting an Ethernet Module 39
Connecting a CBR DSX or CBR E1 Port Module 41
Connecting a QSIM V.35/RS422/EIA530 Port Module 42
Connecting a HSIM Module 53
Connecting a DS1 Frame Access Module 53
Verifying CPU LEDs and Connecting the Office Alarm Connector 54
Connecting the Office Alarm Connector 55
Verifying STX LEDs and Connecting the Optional BITS Clock 56
Connecting the Optional BITS Clock (STX) 56
Step 5: Connect a Management Terminal 58
3
G
ETTING
S
TARTED
Logging On 59
Using the Menus 61
Navigating through the Menus 61
Understanding the Menu Hierarchy 61
Using the Menus to Change Settings 62
Alarm Indicator 62
Performing Initial Configuration 63
Setting up Communication Parameters 63
Configuring the Local Host IP Address 65
Configuring Trap Clients 68
Configuring the Default Gateway 69
Configuring In-band Management 70
In-band Management via the 10Base-T Port on the Near-end MCPU Card 70
In-band Management via the Near-end Dual Ethernet Module 71
Setting up a Password 72
Setting the Time and Date 73
4
P
ATH
B
UILDER
S600 M
ODULE AND
A
PPLICATION
O
VERVIEW
System Module Overview 75
Management CPU Module 75
SNMP MIB Standards Support 76
STX Module 76
Priority Queuing 77
ATM Module Overview 77
DS3 UNI Module Overview 78
E3 UNI Module Overview 78
OC3/STM-1 Module Overview 78
DS1/E1 Module Overview 78
Application Module Overview 78
Ethernet Module Overview 79

Ethernet Module Standards Support 79
Ethernet Module Operation 79
CBR DSX/E1 Module Overview 80
CBR DSX Module 80
CBR E1 Module 81
QSIM/HSIM/FAM Module Overview 82
Application Overview 83
Bridging 83
Filtering 84
Addressing 84
Virtual Circuits 84
Learning Bridge 85
Segmentation 86
Reassembly 87
Spanning Tree 87
Spanning Tree Operation 87
Spanning Tree Instances 88
CBR Application 88
Structured DS1 89
Dynamic Bandwidth Allocation (DS0 Signaling) 90
Unstructured DS1 91
Structured versus Unstructured Summary 93
Ethernet and Voice Application 93
Frame Application 96
DXI Mode 1A 97
Frame Relay Interworking Functions 100
HDLC/SDLC 101
5
C
ONFIGURING
P
ATH
B
UILDER
S600 M
ODULES
, P
ORTS
,
AND
A
PPLICATIONS
Viewing and Configuring System Information 103
Specifying General System Information 104
Managing the System Clock 105
Alarm Conditions that Cause Clock Source Failure 108
Viewing and Configuring RS-232 Parameters 108
Viewing the Firmware Version 110
Downloading New Firmware 110
Resetting the Interface Card 111
Viewing an Equipment List 111
Backing up and Restoring the Database and Code Image 112
Backing up the Database 112
Restoring the Database 112
Backing up the Code Image 113
Restoring the Code Image 113
PathBuilder S600 Configuration Overview 114
Configuring the PathBuilder S600 Shelf and the Application Modules 115
Setting Application Module Status 116

Configuring the Shelf 116
Configuring the Management CPU 117
Viewing MCPU Configuration Information 118
Configuring Virtual Interfaces 118
Adding Virtual Interfaces 118
Viewing and/or Modifying Existing Virtual Interfaces 119
Deleting Virtual Interfaces 120
Configuring Input Shapers 121
Configuring the STX Module 122
Configuring the OC3/STM-1 UNI Module 123
Configuring the DS3 UNI Module 125
Configuring the E3 UNI Module 127
Configuring the DS1 (or E1) UNI with IMA Modules 128
Configuring the DS1/E1 UNI Ports 128
Activation/Deactivation Bit Error Rates 131
Configuring UNI and IMA Groups 132
Adding UNI Groups 132
Adding IMA Groups 134
Viewing and Modifying IMA and UNI Groups 135
Configuring Virtual Interfaces for IMA Groups 137
Deleting IMA and UNI Groups 137
Viewing IMA Link Status 137
Viewing IMA Group Status 140
Configuring the DS1 (or E1) UNI Card 142
Configuring the Ethernet Module 143
Configuring Ethernet Ports, Cards, Shapers and Virtual Interfaces 143
Configuring the Bridge 145
Configuring Source Protocol Filtering 147
Configuring Source Address Filtering 149
Configuring Destination Address Filtering 151
Viewing the List Forwarding Table 152
Constructing the Bridge Static Table 153
Enabling and Disabling the Spanning Tree 154
Configuring IP Over ATM 154
Configuring the CBR DSX (or E1) Modules 158
Configuring the QSIM/HSIM/FAM Modules 163
Configuring the QSIM/HSIM/FAM Ports 163
QSIM/HSIM/FAM Performance at Small Frame Sizes 165
Configuring the QSIM/HSIM/FAM Local Management Interface 167
Configuring the QSIM/HSIM/FAM Card 169
Configuring Virtual Circuits 170
Summary of Supported VPI/VCI Ranges and Number of Connections 171
Adding Virtual Circuits 172
Virtual Circuit Parameters 176
ATM Module Virtual Circuit Parameters 176
Ethernet Card Virtual Circuit Configuration Parameters 177
CBR Card Virtual Circuit Configuration Parameters 177
QSIM/HSIM/FAM Card Virtual Circuit Configuration Parameters 178

Viewing Existing Virtual Circuits 182
Modifying a Virtual Circuit 185
Deleting a Virtual Circuit 186
Viewing Virtual Circuit Statistics 186
6
P
ATH
B
UILDER
S600 D
IAGNOSTICS AND
P
ERFORMANCE
M
ONITORING
Managing System Alarms 187
Viewing and Clearing Current Alarms 188
PathBuilder S600 Alarm Messages (STX) 189
Working with History Alarms 194
Viewing and Printing History Alarms 194
Clearing History Alarms 195
Using Loopbacks 195
DS3 Loopbacks 196
E3 Loopbacks 197
OC3/STM-1 Loopbacks 198
CBR DSX Module Loopbacks 198
FAM Loopbacks 199
DS1/E1 UNI with IMA loopback 200
Viewing Statistics 200
Card Statistics Overview 200
Performance Statistics Overview 200
ATM Statistics Overview 201
Virtual Circuit Statistics Overview 201
Viewing Card Statistics 202
Viewing DS3 Statistics 203
Viewing E3 Statistics 204
Viewing OC3/STM-1 Statistics 205
Viewing DS1 UNI and E1 UNI Statistics 207
Viewing Ethernet Statistics 209
Viewing CBR Statistics 212
Viewing QSIM/HSIM/FAM Statistics 213
Viewing Virtual Circuit Statistics 215
Viewing Virtual Circuit Statistics by Circuit 215
Conforming/Non-Conforming Cell Counters 217
Viewing Virtual Circuit Statistics by Port/Group 218
A
T
ECHNICAL
S
UPPORT
Online Technical Services 221
World Wide Web Site 221
3Com FTP Site 221
3Com Bulletin Board Service 222
Access by Analog Modem 222
Access by Digital Modem 222
3ComFacts Automated Fax Service 222
Support from Your Network Supplier 222
Support from 3Com 223
Returning Products for Repair 224

I
NDEX
3C
OM
C
ORPORATION
L
IMITED
W
ARRANTY

W ARNING I NFORMATION
This section contains warning information for AC powered systems.
Servicing Service of this unit is to be performed by qualified service personnel only.
Service of certain components and subassemblies in this equipment is
accomplished by the replacement of Field Replaceable Units (FRUs). However,
safety agency approval requires that the servicing of other subassemblies within
this product be referred to 3Com’s service personnel.
The trim enclosure and other mechanically secured plates serve as protection
barriers from potential hazardous internal areas. No attempt should be made to
troubleshoot internal components with these protective barriers removed
without first disconnecting the equipment from main power.
Rack Mounting This equipment is for use only in complete equipment where the acceptability of
the combination is determined by the applicable safety agency in the country in
which it is installed. This includes UL in the U.S.A., CSA in Canada, and TUV in
Europe.
Conditions of Acceptability: When installed in the end-use equipment, the
following are among the considerations to be made.
1 The units shall be installed in compliance with enclosure, mounting, spacing,
casualty, and segregation requirements of the ultimate application.
2 These units have been judged on the basis of the required spacings of UL 1950
D3 deviations edition, CSA 22.2 No. 950-M89, and EN 60950 1988 through
TUV Rheinland, which would cover these components if submitted for
unrestricted listing or certification.
3 Complete testing should be performed in the end-use product.
4 Rack configurations with certain combinations of 3Com equipment installed in
racks with a height greater than 50” (127 cm) may require a counter-balance
weight, a stabilizer bar, or anti-tip legs to ensure rack stability in accordance
with safety agency regulations. See specific rack installation guidelines for 3Com
recommendations.
Power and Power
Cords
This equipment is not intended for use with IT power distribution systems
whose line to line voltage exceeds 250 VAC RMS defined by EN 60950 as
having no direct connection to earth. The PathBuilder S600 WAN Access Switch
will autoconfigure for 115 VAC or 220-240 VAC.

x C
HAPTER
: W
ARNING
I
NFORMATION
NORTH AMERICAN APPLICATIONS: Use a UL Listed and CSA Certified Cord Set
rated 6 amps, consisting of a minimum 18 AWG, Type SVT or SJT three
conductor cord maximum of 15 feet in length, with a NEMA 5-15P plug.
INTERNATIONAL APPLICATIONS: The power supply cords used with this
equipment should be harmonized with all local standards applicable in the
country in which it is installed.
Safety agency compliance requires this unit to be connected to branch circuits
with overcurrent protection
£ 20A for North American applications and £ 10A
for international applications.
The power supply cord must be disconnected when servicing all components or
subsystems.
EMI FCC - This equipment generates, uses, and can radiate radio frequency energy,
and if not installed and used in accordance with the instruction manual, may
cause interference to radio communications. It has been tested and found to
comply with the limits for a Class A computing device pursuant with Part 15 of
the FCC Rules, which are designed to provide reasonable protection against
such interference when operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
required to correct the interference. These tests were conducted with shielded
communications cables with metal connector hoods; the use of unshielded
cables may void this compliance.
Canada - This digital apparatus does not exceed the Class A limits for radio
noise emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.
Europe - This is a Class A product. In a domestic environment this product may
cause radio interference, in which case, the user may be required to take
adequate measures.
Safety Classification
of Ports for
Connection to
Telecommunications
Networks
The following port types in the product range are classified according to the
Harmonized Europeans Standard EN41003, subclause 4.1.3, as follows:
E1/E3 - TNV normally operating within SELV limits (TNV-1)
1
Telecommunications Network Voltage (EN60950, subclause 1.2.8.8)
2
Safety Extra-Low Voltage (EN60950, subclause 1.2.8.5)

S UPPLEMENTARY R EGULATORY
I
NFORMATION
This section provides information about host chassis/module compatibility and
creepage/clearance requirements. It also describes the compliance of the
PathBuilder
®
S600 with FCC and CE regulations.
Host Chassis/Module
Compatibility and
Creepage/Clearance
Requirements
The installer of the E1 CBR and E3 UNI Module must ensure that the host
chassis and module are compatible and that the host chassis is capable of
providing adequate power to the module and any other auxiliary host apparatus.
The E1 CBR Module has the following input power requirements:
+5 vdc @ 3.6 Amps
The E3 UNI Module has the following input power requirements:
+5 vdc @ 3.0 Amps
Please contact 3Com for an up-to-date list of compatible host chassis.
In order to maintain the independent approval of this card, it must be installed
in such a way that with the exception of the connections to the host, when
other option cards are introduced which use or generate a hazardous voltage,
the minimum creepages and clearances specified in the table below are
maintained. A hazardous voltage is one which exceeds 42.2V peak AC or 60V
DC.
If you have any doubt, seek advice from a component engineer before installing
other adapters into the best equipment.
The larger distance shown in brackets applies where the local environment
within the host is subject to conductive pollution or dry non-conductive
pollution which could become conductive due to condensation. Failure to
maintain these minimum distances would invalidate the approval.
Clearance (mm) Creepage (mm)
Voltage Used or Generated by Host
or Other Cards
2.0 2.4 (3.8) Up to 59 Vrms or Vdc
2.6 3.0 (4.8) Up to 125 Vrms or Vdc
4.0 5.0 (8.0) Up to 250 Vrms or Vdc
4.0 6.4 (10.0) Up to 300 Vrms or Vdc
For a host or other expansion card fitted in the
host, using or generating voltages greater than
300V (rms or dc), advice from a competent
telecommunications safety engineer must be
obtained before installation of this card.
Above 300 Vrms or Vdc

xii CHAPTER : SUPPLEMENTARY REGULATORY INFORMATION
Clearance (distance X in the figure below) is defined as the shortest distance
between two conductive parts, or between the conductive part and the bonding
surface of the equipment, measured through air.
Creepage (distance Y in the figure below) is defined as the shortest path
between two conductive parts, or between the conductive part and the bonding
surface of the equipment, measured along the surface of the insulation.
FCC Part 68 Statement This equipment complies with Part 68 of the Federal Communications
Commission (FCC) rules. On the product is a label that contains the FCC
registration number for this device. If requested, you must provide this
information to the telephone company.
This equipment is designed to be connected to the telephone network or
premises wiring using a compatible modular jack which is Part 68 compliant.
See installation instructions for details.
If this device causes harm to the telephone network, the telephone company
will notify you in advance that temporary discontinuance of service may be
required. The telephone company may request that you disconnect the
equipment until the problem is resolved.
The telephone company may make changes in its facilities, equipment,
operations, or procedures that could affect the operation of this equipment. If
this happens, the telephone company will provide advance notice in order for
you to make necessary modifications to maintain uninterrupted service.
If you experience trouble with this equipment or for repair or warranty
information, please follow the applicable procedures explained in the Technical
Support section of this manual (Appendix A).
Interface Module Adjacent Card
Host Chassis
Components
Y
X

CE Notice Marking by the symbol CE indicates compliance of the equipment with the
EMC, Telecom and Low Voltage dIrectives of the European Community. Such
marking is indicative that this equipment meets or exceeds the following
technical standards.
EN55022—Limits and methods of measurement of radio interference
characteristics of information technology equipment.
EN50082-1—Electromagnetic compatibility - generic immunity standard part 1:
residential, commercial, and light industrial.
CTR 12—Connection of 2 Mbit/s Unstructured Leased Lines.
CTR13—Connection to 2 Mbit/s Structured Leased Lines.
EN 60950—Safety of Information Technology Equipment including Electrical
Business Equipment.
EN 41003—Particular safety requirements for electrical equipment to be
connected to Telecom networks.
WARNING: This customer equipment is to be installed and maintained by
service personnel as defined by AS/NZS 3260 clause 1.2.14.3. (Service
Personnel). Incorrect connection of connected equipment to the General
Purpose Outlet could result in a hazardous situation.
WARNING Safety requirements are not fulfilled unless the equipment is
connected to a wall socket outlet with protective earth contact.

xiv CHAPTER : SUPPLEMENTARY REGULATORY INFORMATION

ABOUT THIS GUIDE
About This Guide provides an overview of this guide, describes guide conventions,
tells you where to look for specific information and lists other publications that
may be useful.
Introduction This guide describes how to install and configure the PathBuilder S600 WAN
Access Switch (PathBuilder S600). It also provides an overview of the unit’s
modules and supported applications.
Audience Description This guide is intended for network administrators, system engineers, field
engineers, and other personnel responsible for installing, configuring, and
managing PathBuilder products.
If the information in the Release Notes shipped with your product differs from the
information in this guide, follow the Release Notes.
How to Use This Guide Table 1 shows where to find specific information in this guide.
Table 1 Where to Find Specific Information
If you are looking for... Turn to...
Descriptions of the features and benefits of the PathBuilder S600 Chapter 1
System specifications Chapter 1
Installation instructions Chapter 2
Information on how to get started using the PathBuilder S600 Chapter 3
Instructions for using the PathBuilder S600 menus Chapter 3
Information about the specific modules and applications you can use with
the PathBuilder S600 Chapter 4
Instructions for configuring PathBuilder S600 modules, ports, and cards Chapter 5
Instructions for configuring virtual interfaces Chapter 5
Instructions for configuring shapers Chapter 5
Instructions for configuring virtual circuits Chapter 5
Instructions for configuring bridging applications Chapter 5
Information about managing system alarms and lists of the alarms
supported by each of the PathBuilder S600 modules Chapter 6
Information about setting up loopbacks and what loopbacks specific
modules support Chapter 6
Information on displaying statistics and lists of the types of statistics
available for specific modules Chapter 6
Technical support information Appendix A

16 ABOUT THIS GUIDE
Conventions Table 2 and Table 3 list conventions that are used throughout this guide.
Table 2 Notice Icons
Icon Notice Type Alerts you to...
Information note Important features or instructions
Caution Risk of personal safety, system damage, or loss of data
Warning Risk of severe personal injury
Table 3 Text Conventions
Convention Description
Syntax The word “syntax” means you must evaluate the syntax provided and
supply the appropriate values. Placeholders for values you must supply
appear in angle brackets. Example:
Enable RIPIP by using the following syntax:
SETDefault !<port> -RIPIP CONTrol = Listen
In this example, you must supply a port number for <port>.
Commands The word “command” means you must enter the command exactly as
shown in text and press the Return or Enter key. Example:
To remove the IP address, enter the following command:
SETDefault !0 -IP NETaddr = 0.0.0.0
This guide always gives the full form of a command in uppercase and
lowercase letters. However, you can abbreviate commands by entering
only the uppercase letters and the appropriate value. Commands are
not case-sensitive.
Screen displays This typeface represents information as it appears on the screen.
The words “enter”
and “type” When you see the word “enter” in this guide, you must type something, and then press the Return or Enter key. Do not press the
Return or Enter key when an instruction simply says “type.”
[Key] names Key names appear in text in one of two ways:
nReferred to by their labels, such as “the Return key” or “the Escape
key”
nWritten with brackets, such as [Return] or [Esc].
If you must press two or more keys simultaneously, the key names are
linked with a plus sign (+). Example:
Press [Ctrl]+[Alt]+[Del].
Menu commands
and buttons Menu commands or button names appear in italics. Example:
From the Help menu, select Contents.
Words in italicized
type Italics emphasize a point or denote new terms at the place where they are defined in the text.
Words in bold-face
type Bold text denotes key features.

Related Documentation 17
Related
Documentation
In addition to this guide, the following documentation may help you use the
PathBuilder S600.
PathBuilder S600 Release Notes—Provides configuration help and information
about new features and any known limitations and issues found in the release.
PathBuilder Switch Manager User Guide—Describes how to use PathBuilder
Switch Manager to configure and manage PathBuilder WAN access switches.
Using PathBuilder Switch Manager, you can configure shelf, device, and circuit
information; use a loopback panel to diagnose port cards; view line and interface
statistics; and perform administrative functions such as configuring trap
destinations and setting SNMP community strings.

18 ABOUT THIS GUIDE

1SYSTEM DESCRIPTION
This chapter provides a brief overview of ATM (Asynchronous Transfer Mode)
technology, describes the PathBuilder®S600 WAN Access Switch (PathBuilder
S600), and lists PathBuilder S600 system specifications. It includes the following
sections:
nATM Overview
nPathBuilder S600 with STX Overview
nSpecifications
nOptions and Parts List
ATM Overview ATM provides the means of simultaneously transferring a wide variety of services
with different protocols and bandwidth requirements such as voice, packet data,
and video between end users or user networks. It does so by segmenting the input
data streams into 53 byte cells, assigning the cells to virtual circuits set up in the
ATM network, multiplexing the cells for transmission according to the bandwidth
requirements of the individual data streams, and reassembling the cells into the
original data streams at the receiving end.
For more detail about how to apply the PathBuilder S600 to provide ATM WAN
access, see “Application Overview” in Chapter 4.
Virtual Circuits ATM networks are organized into virtual circuits or logical duplex paths between
two ATM unit ports, as shown in Figure 1.
Figure 1 Virtual Circuit Scheme
VPI 1
VCI 1 (Transmit)
VCI 1
(
Receive
)
{
Virtual
Circuit
Transmission
Path
VPI 1
VPI 2
VPI 3
{
{
VCIs
VCIs
VCI 1 (Transmit)
VCI 1 (Receive)
{
Virtual
Circuit
Transmission
Path

20 CHAPTER 1: SYSTEM DESCRIPTION
Each transmission direction in a virtual circuit is referred to as a virtual channel.
Virtual channels are then grouped into virtual paths between two ports. The
channels and paths are assigned numbers: VPIs (Virtual Path Indicators) and VCIs
(Virtual Channel Indicators). Each ATM cell (a fixed-length unit of data over ATM)
is assigned to a virtual circuit by including the circuit's VPI/VCI in the cell's header.
This is then used to steer the cell through an ATM unit and the ATM network.
PathBuilder S600 with
STX Overview
The PathBuilder S600 WAN access switch with Super Transport eXchange (STX)
provides enhanced switching and traffic management capabilities. It is designed to
concentrate, aggregate, and switch local ATM and legacy traffic over ATM
wide-area services for affordable ATM services access.
The PathBuilder S600 with STX requires software Release 2.0 or higher.
PathBuilder S600 STX
Architecture
The modular architecture of the PathBuilder S600 with STX is designed to
accommodate a wide range of interfaces and support a comprehensive set of
applications. The core component of the unit is a 1.6 Gbps cell bus backplane
where all traffic is carried in the form of ATM cells. The PathBuilder S600 with STX
accommodates up to two power supplies (AC110/220 VAC and DC-48 VDC) in a
redundant configuration.
The overall design philosophy of the PathBuilder S600 with STX is to facilitate the
transfer of cells on and off the bus backplane with enhanced traffic management
and switching capabilities. All packet to cell segmentation and reassembly (SAR)
functions are performed on each of the application modules (Ethernet, Frame
Relay, and CBR), thereby ensuring efficient cell transfer through the system, (See
Figure 2.) Additional SAR power is added each time a non-ATM interface module
is added.
Figure 2 PathBuilder S600 with STX Cell Bus Architecture
Because the STX module allows any-to-any port switching, there is no distinction
between port and trunk modules for the PathBuilder S600 with STX. Thus, the slot
assignments are as follows:
10bt(2)
Ethernet
V.35(4), HSSI(1), T1(8)
Frame
Relay
T1/E1(4/8)
CBR
STX MCPU
T1/E1, IMA(8), OC3/STM-1,
ATM
HSSI, DS3/E3
10bt, RS232, SLIP