Compaq Compaq SW3322 User manual

©1999CompaqCorporation.Allrightsreserved.
CompaqRegisteredU.S.PatentandTrademark
Office.Companyandproductnames
mentionedhereinmaybetrademarksand/or
registeredcopyrightandtrademarksoftheir
respectivecompanies.
SW3322/SW3323/SW3324
Dual-SpeedSwitch
UserGuide

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
;VMXIV*VER7TVEKIRW4VSNIGX'SQTEU7;7;(YEP7TIIH7[MXGL9WIV+YMHI'SQQIRXW
*MPI2EQICRHSG0EWX7EZIH3R41
238-')
The information in this publication is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR
EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR
USE OF THIS MATERIAL.
This publication contains information protected by copyright. No part of this publication may be
photocopied or reproduced in any form without prior written consent from Compaq Computer
Corporation.
The software described in this guide is furnished under a license agreement or non disclosure agreement.
The software may be used or copied only in accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective
companies.
1999 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
Compaq
Registered United States Patent and Trademark Office.
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Forth Edition (March 1999)
Part Number 355307-003

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MMM
'SQTEU7;7;7;(YEP7TIIH7[MXGL9WIV+YMHI
;VMXIV*VER7TVEKIRW4VSNIGX8EFPISJ'SRXIRXW'SQQIRXW
*MPI2EQICXSGHSG0EWX7EZIH3R41
'SRXIRXW
'LETXIV
3ZIVZMI[
Description ..................................................................................................................1-1
Features ....................................................................................................................... 1-2
Front Panel ..................................................................................................................1-4
Rear Panel....................................................................................................................1-8
Feature Summaries......................................................................................................1-9
IEEE 802.1D Bridge.............................................................................................1-9
Spanning Tree Protocol........................................................................................1-9
Frame Buffering and Frame Latency..................................................................1-10
Software Download............................................................................................1-10
Non-volatile Parameter Storage .........................................................................1-10
Configuration and Management Interfaces ........................................................1-11
RMON................................................................................................................1-12
Port Mirroring ....................................................................................................1-12
Auto-negotiation.................................................................................................1-13
Broadcast Throttling...........................................................................................1-13
BootP/DHCP......................................................................................................1-13
LEDs ..................................................................................................................1-13
Full Duplex Mode ..............................................................................................1-14
Flow Control ......................................................................................................1-14
Virtual LANs (VLANs)......................................................................................1-14
Class of Service..................................................................................................1-15
Application Examples ...............................................................................................1-15
Client/Server Network Application....................................................................1-15
Local Backbone Application..............................................................................1-16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MZ
;VMXIV*VER7TVEKIRW4VSNIGX8EFPISJ'SRXIRXW'SQQIRXW
*MPI2EQICXSGHSG0EWX7EZIH3R41
'LETXIV
-RWXEPPEXMSR
Inspecting Your Shipment...........................................................................................2-1
Site Requirements........................................................................................................2-1
Mounting the Switch on a Table or Shelf....................................................................2-3
Mounting the Switch in a Rack ...................................................................................2-3
Connecting a Terminal to the Console Port.................................................................2-5
Replacing an Installed Gigabit Ethernet Module into the Switch................................2-6
Powering the Switch....................................................................................................2-7
Power-Up .............................................................................................................2-8
RJ-45 Connector...................................................................................................2-9
Network Cable Requirements.............................................................................2-10
1000Base-SX/LX Ports......................................................................................2-11
'LETXIV
7;7;7;9WIV-RXIVJEGI
Overview.....................................................................................................................3-1
User Access.................................................................................................................3-2
Factory Defaults ..........................................................................................................3-2
Menu Hierarchy...........................................................................................................3-4
Main Menu ..................................................................................................................3-5
System Configuration Menu........................................................................................3-6
SNMP Configuration Menu.........................................................................................3-7
Switch Configuration Menu ........................................................................................3-8
Forwarding Table Configuration Menu.....................................................................3-10
Spanning Tree Configuration Menu..........................................................................3-11
Spanning Tree Port Configuration Menu...................................................................3-12
Spanning Tree Port #n Configuration Menu..............................................................3-14
VLAN Configuration Menu ......................................................................................3-15
VLAN Menu..............................................................................................................3-16
VLAN #n Configuration Menu .................................................................................3-17
VLAN Port Menu......................................................................................................3-18
Class of Service Configuration Menu........................................................................3-19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z
'SQTEU7;7;7;(YEP7TIIH7[MXGL9WIV+YMHI
;VMXIV*VER7TVEKIRW4VSNIGX8EFPISJ'SRXIRXW'SQQIRXW
*MPI2EQICXSGHSG0EWX7EZIH3R41
Port Priority Menu.....................................................................................................3-20
Port Menu..................................................................................................................3-21
Port Configuration Menu...........................................................................................3-23
Switch Statistics Screen.............................................................................................3-24
Switch Summary Screen............................................................................................3-26
Port Statistics Screen.................................................................................................3-27
General Information Screen.......................................................................................3-29
Download Software Menu.........................................................................................3-30
Save Current Configuration.......................................................................................3-31
Return to Default Configuration................................................................................3-31
Logout .......................................................................................................................3-31
Reset.......................................................................................................................... 3-32
'LETXIV
'SRJMKYVMRKERH1SRMXSVMRKXLI7[MXGL
Common Tasks............................................................................................................4-1
Setting Password Protection........................................................................................4-2
Assigning an IP Address..............................................................................................4-3
Checking Network Configuration Status.....................................................................4-3
Connecting via Telnet..................................................................................................4-3
Setting SNMP Management Access............................................................................4-4
Viewing Switch Statistics............................................................................................4-5
Configuring Port Mirroring.........................................................................................4-5
Downloading a Software Upgrade...............................................................................4-6
Downloading Via the Serial Port.................................................................................4-6
Downloading Via TFTP ..............................................................................................4-7
Configuring Spanning Tree Parameters.......................................................................4-8
Configuring VLANs....................................................................................................4-9
Configuring Class of Service.......................................................................................4-9
Configuring Port Operation.......................................................................................4-10
Configuring the Forwarding Table............................................................................4-11
Configuring Broadcast Cutoff Rate...........................................................................4-13
Setting a Default Gateway.........................................................................................4-13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZM
;VMXIV*VER7TVEKIRW4VSNIGX8EFPISJ'SRXIRXW'SQQIRXW
*MPI2EQICXSGHSG0EWX7EZIH3R41
Configuring BootP/DHCP.........................................................................................4-14
'LETXIV
72141EREKIQIRX
The SNMP Protocol ....................................................................................................5-1
MIB Objects ................................................................................................................5-2
RFC 1213 (MIB-II)..............................................................................................5-3
RFC 1398 (Ethernet MIB)....................................................................................5-4
RFC 1493 (Bridge MIB) ......................................................................................5-4
RFC 1757 (RMON MIB).....................................................................................5-5
Proprietary MIB Extensions.................................................................................5-5
Compiling MIB Extensions.........................................................................................5-7
%TTIRHM\%
8IGLRMGEP7TIGMJMGEXMSRW
General .......................................................................................................................A-1
Standards Compliance......................................................................................... A-1
Certification.........................................................................................................A-1
Data Rate............................................................................................................. A-2
Environmental Specifications..............................................................................A-2
Electrical Specifications...................................................................................... A-2
Physical ............................................................................................................... A-2
Microprocessor....................................................................................................A-2
Memory...............................................................................................................A-3
Port Specifications...................................................................................................... A-3
Console Port........................................................................................................A-3
10Base-T and 100Base-TX Ports........................................................................ A-4
MDI/MDI-X Crossover Cable Wiring ................................................................A-4
%TTIRHM\&
7TERRMRK8VII'SRGITXW
General ....................................................................................................................... B-1
Spanning Tree Features.............................................................................................. B-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZMM
'SQTEU7;7;7;(YEP7TIIH7[MXGL9WIV+YMHI
;VMXIV*VER7TVEKIRW4VSNIGX8EFPISJ'SRXIRXW'SQQIRXW
*MPI2EQICXSGHSG0EWX7EZIH3R41
Spanning Tree Protocol in a Network ........................................................................ B-2
Spanning Tree Protocol Parameters............................................................................ B-3
Spanning Tree Protocol Operation ............................................................................. B-5
Communicating Between Bridges....................................................................... B-5
Selecting a Root Bridge and Designated Bridges................................................ B-5
Selecting Designated Ports.................................................................................. B-5
Handling Duplicate Paths.................................................................................... B-5
Remapping Network Topology........................................................................... B-6
%TTIRHM\'
:MVXYEP0%2W:0%2W
VLANs and Frame Tagging ....................................................................................... C-1
VLAN Access Ports ................................................................................................... C-2
VLAN Hybrid Ports ................................................................................................... C-3
VLAN Application Example...................................................................................... C-4
%TTIRHM\(
Class of Service ......................................................................................................... D-1
%TTIRHM\)
Acronyms and Abbreviations......................................................................................E-1
%TTIRHM\*
Regulatory Compliance...............................................................................................F-1
-RHI\

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZMMM 4VIJEGI
'SQTEU7;7;7;(YEP7TIIH7[MXGL9WIV+YMHI
;VMXIV*VER7TVEKIRW4VSNIGX4VIJEGI'SQQIRXW
*MPI2EQICTVHSG0EWX7EZIH3R%1
4VIJEGI
This manual includes information about how to install, configure, and operate
the Compaq SW3322/SW3323/SW3324 Dual-Speed Switch. We recommend
that you read all chapters in this manual to become familiar with the switch’s
features and to ensure a successful installation.
%YHMIRGI
This guide is intended for Ethernet local area network (LAN) administrators
and Management Information Systems (MIS) personnel with the following
background:
■Working knowledge of Ethernet LANs
■Familiarity with Transmission Control Protocol/Internet Protocol
(TCP/IP) and Simple Network Management Protocol (SNMP)
*SVQEXXMRK'SRZIRXMSRW
The following are formatting conventions found in this guide.
■Keys you are instructed to press appear in boldface type. For example,
press the Enter key.
■Italics Table names, menus, menu selections, special names, and
words used for emphasis appear in italics.
Special types of messages throughout this guide are explained below.
;%62-2+8I\XWIXSJJMRXLMWQERRIVMRHMGEXIWXLEXJEMPYVIXSJSPPS[
HMVIGXMSRWMRXLI[EVRMRKGERVIWYPXMRFSHMP]LEVQSVPSWWSJPMJI
'%98-32 8I\XWIXSJJMRXLMWQERRIVMRHMGEXIWXLEXJEMPYVIXSJSPPS[
HMVIGXMSRWGERVIWYPXMRHEQEKIXSIUYMTQIRXSVPSWWSJMRJSVQEXMSR

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M\
'SQTEU7;7;7;(YEP7TIIH7[MXGL9WIV+YMHI
;VMXIV*VER7TVEKIRW4VSNIGX4VIJEGI'SQQIRXW
*MPI2EQICTVHSG0EWX7EZIH3R%1
-14368%28 8I\XWIXSJJMRXLMWQERRIVTVIWIRXWGPEVMJ]MRKMRJSVQEXMSRSV
WTIGMJMGMRWXVYGXMSRW
238) 8I\XWIXSJJMRXLMWQERRIVTVIWIRXWMRJSVQEXMSRSJMRXIVIWX
/I]FSEVH)RXVMIW
This guide uses the following conventions for keyboard entries:
■When you read “enter,” type the text and press the <Enter> key.
Example: Enter the Gateway IP address and press the <Enter> key.
■When you read “select,” type the letter associated with the parameter.
Example: Select afrom the System Configuration Menu to view the SNMP
Configuration Menu.
3XLIV'SRZIRXMSRW
This guide uses the following typographical conventions:
■Initial Caps Menu titles and console menu selections
■<Enter> Used to designate the Enter or Return key.
■ALL CAPS Used to designate fields within the console menus.
(Example: CONNECTION)
■courier font Screen messages and user prompts.
■Selection Describes a user-configurable user interface item.
■Field Describes a read-only information item.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
\ 4VIJEGI
;VMXIV*VER7TVEKIRW4VSNIGX4VIJEGI'SQQIRXW
*MPI2EQICTVHSG0EWX7EZIH3R%1
3VKERM^EXMSR
Chapter 1, Overview: Describes the features of the switch, front and rear panel
components and application examples.
Chapter 2, Installation: Describes the content of your switch shipment, lists
site requirements, and provides mounting instructions. Instructions for making
connections and powering up the switch are provided as well.
Chapter 3, User Interface: Describes the user interface console menus and
lists the factory defaults for system settings. Each menu is presented along with
a description of the selections/fields available within the menu.
Chapter 4, Configuring and Monitoring the Switch: Describes common
tasks and associated steps required to configure the switch, and covers common
switch and network considerations required to ensure system integrity.
Chapter 5, SNMP Management: Describes how the Simple Network
Management Protocol (SNMP) communication protocol is used to manage the
switch, and provides a description of industry standard and proprietary
Managed Information Bases (MIBs) supported by the switch.
Appendix A, Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational specifications.
Appendix B, Spanning Tree Concepts: Describes Spanning Tree Protocol and
how it is used to resolve the problems of physical loops in a network.
Appendix C, Virtual LANs (VLANs): Describes how the switch uses VLANs
to create isolated network domains, and provides illustrations of VLAN switch
configurations.
Appendix D, Class of Service: Describes how the traffic Class of Service
features can be used to assign mission-critical data a higher priority through the
switch by delaying less critical traffic during periods of congestion.
Appendix E, Acronyms and Abbreviations: Defines common acronyms and
abbreviations used within the user guide and the networking industry.
Appendix F, Regulatory Compliance: Provides information about compliance
with requirements of various regulatory agencies.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Chapter 1
Overview
Description
This user guide describes the Compaq SW3322, SW3323, and SW3324 Dual-
Speed Switch. These IEEE 802.1D-compliant Ethernet switches support 24
IEEE 802.3u 100Base-TX Fast Ethernet ports. Each port can alternatively
operate as an IEEE 802.3i 10Base-T port. Additionally, the SW3324 switch
features two Gigabit Ethernet ports which operate at 1 Gb/s. These ports
support the various physical media transceiver flavors of IEEE 802.3z Gigabit
Ethernet through the use of modular Gigabit Interface Converters (GBICs).
Supported media includes multimode fiber, single mode fiber. You can
configure the SW3323 switch, pre-installed with a modular card, so that Ports 1
and 2 support Fast Ethernet over fiber (IEEE 802.3u).
The switch automatically learns addresses and stores them in a Media Access
Control (MAC) address forwarding table. Each port on the switch operates at
full Fast Ethernet wire speed with full address and frame filtering. The switch
has complete non-blocking performance, capable of forwarding minimum size
packets at full wire speed on all ports simultaneously in full duplex mode.
The switch contains advanced features such as Remote Monitoring (RMON),
IEEE 802.1Q virtual LANs (VLANs), IEEE 802.1p Class of Service, flow
control, and broadcast throttling. For network management, the switch includes
a standards-compliant Simple Network Management Protocol (SNMP) agent.
This agent allows network management station applications (such as Compaq
Networking Management Software, included with the switch) to collect and
present status and performance information about a switch. In addition, it
provides the ability to configure and control functions on the device. Network
management can also be performed in-band using the popular TCP/IP
application, Telnet. In addition, a serial console port allows out-of-band
management using a PC or ASCII terminal.
The switch is desktop or rack-mountable. LEDs on the front panel provide
information about the operating status of the switch. The back panel of the
switch contains the power connector and a power switch. Two fans maintain
ventilation and cooling for internal switch components.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2Overview
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Features
nPorts:
qSW3322 -24 dual-speed 10Base-T/100Base-TX RJ-45 ports
qSW3323 - 22 dual-speed 10Base-T/100Base-TX RJ-45 ports plus
two 100Base-FX ports (for SW3323with fiber card pre-installed)
qSW3324 - 24 dual-speed 10Base-T/100Base-TX RJ-45 ports plus
two 1000Base-X ports (Optional GBIC module for 1000Base-LX)
nArchitecture:
q8-port 10/100 switch ASIC in a distributed switching architecture
q4.2 Gb/s internal switching fabric
q12 MB packet buffering (512 KB/port) for SW3322 and SW3323
q28 MB packet buffering for SW3324
qMAC address supported per switch ASIC 4096
SW 3322/23 12,288
SW3324 20,480
qIEEE 802.3u auto-negotiation for full/half duplex and 10/100 Mb/s
speed operation on all RJ-45 ports
qHigh performance store-and-forward switching
nPerformance:
qWire speed with minimum size packets on all ports simultaneously
in full duplex mode
qForwarding: 3.6 million packets-per-second (64 byte packets)
qFiltering: 3.6 million packets-per-second (64 byte packets)
nTraffic Management:
qTagging and port-based VLANs per the IEEE 802.1Q draft standard
- up to 4094 VLANs per switch
qTraffic Class of Service support using the IEEE 802.1p draft standard
qFlow control per port: receives IEEE 802.3x frames

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
qBroadcast throttling for broadcast storm control
nNetwork Management:
qSNMP compliant agent: MIB II (RFC 1213), Bridge MIB (RFC
1493), Ethernet MIB (RFC 1398), RMON - Statistics, History,
Alarm and Event groups per port (RFC 1757), private MIB
extensions
qAs a standard feature, Compaq Network Management Software is
included at no additional charge with the switch. You can
immediately configure the switch, get detailed port-level
information, graph performance statistics, and more.
qPort mirroring for network monitoring and analysis
qTelnet
qConsole port, RS-232, DB-9 connector, null modem
qBootP/DHCP for IP address configuration
nLED Indicators:
q10Base-T/100Base-TX Ethernet ports: Link, Activity, Full Duplex,
100Mb/s Speed
q100Base-FX: Link, Activity
q1000Base-X GBIC ports: Link, Activity on base unit
qSystem: Power, Test
nSoftware:
qExtensive software diagnostics for product testing and
troubleshooting
qSoftware upgrades using the front panel console port or in-band
with TFTP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4Overview
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Front Panel
Figure 1-1 shows the front panel of the SW3322, SW3323, and SW3324
switch.
Figure 1-1SW3322, SW3323, and SW3324 Front Panel
Figure 1-2 shows the Link (L) and Activity (A) port LEDs for 24 10Base-
T/100Base-TX ports (default configuration). Pressing the front panel LED
mode button changes the operation of these LEDs to Full Duplex (L) and 100M
Speed (A), as shown in Figure 1-3.
NOTE: The numbers above and below the L/A port LEDs report performance for a
specific RJ-45 port.
Gigabit Ethernet ports
10Base-T/100Base-TX
RJ-45 ports
Console port
Gigabit Ethernet
LEDs
Ports 1-8 LEDs
Ports 9-16 LEDs
Ports 17-24 LEDs
LED mode
button
Power
LED
Test
LED

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Figure 1-2Port LEDs (L/A) Default Configuration
Figure 1-3Port LEDs (L/A) LED Mode Button Pressed
Link Ports 1-4
Activity Ports 1-4
Link Ports 5-8
Activity Ports 5-8
Link Ports 9-12
Activity Ports 9-12
Link Ports 13-16
Activity Ports 13-16
Link Ports 17-20
Activity Ports 17-20
Link Ports 21-24
Activity Ports 21-24
Full/Half Duplex Ports 1-4
10/100 Speed Ports 1-4
Full/Half Duplex Ports 5-8
10/100 Speed Ports 5-8
Full/Half Duplex Ports 9-12
10/100 Speed Ports 9-12
Full/Half Duplex Ports 13-16
10/100 Speed Ports 13-16
Full/Half Duplex Ports 17-20
10/100 Speed Ports 17-20
Full/Half Duplex Ports 21-24
10/100 Speed Ports 21-24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6Overview
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Table 1-1 defines the front panel components.
Table 1-1
Front Panel Components
Name Function
100Base-FXFiber Ports (Ports 1
and 2)(SW3323 with fiber card
pre-installed)
Multi-mode fiber ports used with SC fiber connectors. Indicates Link and
Activityinformation.
Gigabit Ethernet ports 25 and 26
LEDs (SW3324) Indicates Link and Activity information
1000Base-X Gigabit Ethernet ports
SW3324) Gigabit Ethernet ports using GBIC modules
Fiber Ports 1 and 2 LEDs
(SW3323 with fiber card
pre-installed)
Indicates Link and Activity information (see Table 1-2 for details).
Ports 1-24 RJ-45 LEDs (SW3322) Indicates Link, Activity, Speed and Duplex information (see Table 1-2
for details).
LED mode button Button used to switch RJ-45 port LEDs between Link/Activity mode and
100M/Full Duplex mode. This button has no affect when using Multi-mode
fiber Ports 1 and 2 (SW3323).
PowerLED Lights steady green to indicate power is supplied to the switch. Off
indicates no power is supplied to the switch.
Test LED Lights steady green after a reset and remains on until successful
completion of power-on self tests. Off indicates a successful completion of
the power-on self tests.
Consoleport DB-9 connector configured as a null modem connection for serial out-of-
band management using the console menus.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-7
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
The port LEDs are grouped to the left of their corresponding RJ-45 ports. Table
1-2 defines the performance of the port LEDs for the 10Base-T/100Base-TX
ports in the default configuration.
Table 1-2
Port LEDs Defined
Name Function
Gigabit Ethernet Ports L LED On: Indicates a valid connection (link) on the associated port.
L LED Off: Indicates no link on the associated port.
A LED flashing: Indicates the presence of transmit and/or receive activity.
A LED Off: Indicates the absence of transmit or receive activity.
RJ-45 Ports
DefaultConfiguration L LED On: Indicates a valid connection (link) on the associated port.
L LED Off: Indicates no link on the associated port.
A LED flashing: Indicates the presence of transmit and/or receive activity.
A LED Off: Indicates the absence of transmit or receive activity.
RJ-45 LED mode
buttonpressed L LED On: Port is in the full duplex mode.
L LED Off: Port is in the half duplex mode.
A LED On: Indicates the port is in the 100Base-TX mode.
A LED Off: Indicates the port is in the 10Base-T mode.
Fiber Ports (SW3323) with
fiber card pre-installed Link LED On: Indicates a valid connection (link) on the associated port.
Link LED Off: Indicates no link on the associated port.
Activity LED flashing: Indicates the presence of transmit and/or receive activity.
Activity LED Off: Indicates the absence of transmit or receive activity.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-8Overview
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Rear Panel
Figure 1-4 shows the SW3322/SW3323/SW3324 rear panel and Table 1-3
defines the rear panel components.
Figure 1-4SW3322/SW3323/SW3324 Rear Panel
Table 1-3 defines the performance of the port LEDs for the 10Base-T/100Base-
TX ports with the LED mode button pressed.
Table 1-3
Rear Panel Components
Name Function
PowerConnector Provides AC power to the switch. For information about power requirements and power
cords for use with the switch, see Appendix A, “TechnicalSpecifications.”
PowerSwitch Allows you to turn the switch power on and off.
FanOutlets Air exit vents through which internal fans discharge air for ventilation purposes.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-9
Compaq SW3322/SW3323/SW3324 Dual-Speed Switch User Guide
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Feature Summaries
The following summaries provide a brief description of the switch features in
areas such as standards compliance, functionality, performance, and options.
IEEE 802.1D Bridge
The Compaq switch is fully compliant with IEEE 802.1D transparent bridging
specifications. An aggregate address table containing 4096 entries per 8 switch
ports is provided for learning, filtering, and forwarding. The 24-port switch can
support up to a maximum of 12,288 addresses. Addresses are automatically
learned by the switch, and can be individually assigned specific forwarding
treatment by the network administrator if desired. Forwarding table
configuration can be made out-of-band via the console interface or in-band via
SNMP or Telnet. Static and dynamic addresses are both stored in this table.
One static address is assigned per port by default. The Forwarding Table
Configuration screen in the console menus allows you to assign additional static
addresses if required.
Spanning Tree Protocol
The switch supports the IEEE 802.1D Spanning Tree Protocol. This protocol
allows redundant connections to be created between different LAN segments
for purposes of fault tolerance. Two or more physical paths between different
segments can be created through the switch, with the Spanning Tree Protocol
choosing a single path at any given time and disabling all others. If the chosen
path fails for any reason, a disabled alternative is activated, thereby maintaining
the connection. This prevents network traffic from circulating in an endless
loop formed by multiple connections to the same LAN segment.
The switch is shipped from the factory with Spanning Tree operation disabled.
Spanning Tree parameters are configurable in the Spanning Tree Configuration
Menu using the console menus or via SNMP (see Appendix B, “Spanning Tree
Concepts” for more information).

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-10 Overview
Writer: Fran Spragens Project: Overview Comments:355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Frame Buffering and Frame Latency
The switch is a store-and-forward switching device. Each frame is copied into
switch memory before being forwarded to another port. This method ensures
that all forwarded frames conform to a standard Ethernet frame size and have a
correct cyclic redundancy check (CRC) for data integrity. This switching
method prevents bad frames from traversing the network and using up valuable
network bandwidth, as with cut-through switching technology.
To minimize the possibility of dropping frames on congested ports, the switch
provides 4 MB of dynamically allocated frame buffering per 8 10/100 ports and
8 MB per gigabit port. This buffer space is used to queue packets for
transmission on congested networks. This is an additional advantage over cut-
through switching technology, which drops packets immediately when
experiencing collisions.
Software Download
The switch supports the industry-standard Trivial File Transfer Protocol (TFTP)
for downloading software to the switch. All switch software is stored in a 1 MB
sectored Flash ROM. The download feature allows you to easily install
software upgrades to the unit. Compaq Networking Management Software
includes a TFTP server and a configuration application to allow for the software
downloads. Software can alternatively be downloaded via the serial console
port using the XMODEM protocol.
A TFTP or XMODEM software download is invoked via the Download
Software Menu using the console menus. A TFTP download can also be
invoked via SNMP.
Non-volatile Parameter Storage
Important operating parameters such as IP addresses, Spanning Tree
configuration, and management security parameters, are stored in non-volatile
Flash memory. These values are retained when the switch experiences power
interruptions or is powered down for normal maintenance.