3Com 3848, 3812, 3824 User Manual

SuperStack® 3 Switch 3812, Switch 3824, and

Switch 3848

Getting Started Guide

3C17401

3C17400 3CR17402-91

http://www.3com.com/

Part No. DUA1740-0AAA03 Rev. 01

Published September 2004

3Com Corporation

350 Campus Drive

Marlborough

MA USA 01752-3064

Copyright © 2004, 3Com Corporation. 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 written 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.

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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 or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

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If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private expense. Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in, or delivered to you in conjunction with, this User Guide.

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3Com, the 3Com logo and SuperStack are registered trademarks of 3Com Corporation.

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CONTENTS

ABOUT THIS GUIDE

Conventions 8

Related Documentation 9

Accessing Online Documentation 9

Documentation Comments 10

1INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848

	About the Switch	12
	Summary of Hardware Features				12
	Switch — Front View Detail			13
	10BASE-T/
	100BASE-TX/
	1000BASE-T Ports		14
	Dual Personality SFP Ports			14
	Console Port	14
	LEDs 15
	Switch — Rear View Detail			16
	Power Socket	17
	Redundant Power System Socket (Switch 3848 only) 17
	Default Settings	17
2 INSTALLING THE SWITCH
	Package Contents	20
	Choosing a Suitable Site		20
	Rack-mounting	21
	Placing Units On Top of Each Other				22
	The Power-up Sequence		23
	Powering-up the Switch			23

Checking for Correct Operation of LEDs 23

Connecting a Redundant Power Supply (Switch 3848 only) 23

	Choosing the Correct Cables				24
	SFP Operation 25
	Approved SFP Transceivers			25
	Inserting an SFP Transceiver				25
	Removing an SFP Transceiver				27
3 SETTING UP FOR MANAGEMENT
	Setting Up Overview		30
	IP Configuration	31
	Preparing for Management				32
	Manually Configuring IP Information					32
	Connecting to the Console Port					32
	Viewing Automatically Configured IP Information							36
	Using 3Com Network Supervisor					36
	Connecting to the Console Port					36
	Methods of Managing a Switch				39
	Command Line Interface Management						39
	Web Interface Management				40
	SNMP Management		40
	Setting Up Command Line Interface Management							40
	CLI Management via the Console Port						41
	CLI Management over the Network 41
	Setting Up Web Interface Management						42
	Pre-requisites	42
	Web Management Over the Network						43
	Setting Up SNMP Management				43
	Pre-requisites	43
	Default Users and Passwords			44
	Changing Default Passwords				44
4 PROBLEM SOLVING
	Solving Problems Indicated by LEDs					46
	Solving Hardware Problems			47
	Solving Communication Problems				49
	Solving Software Upgrade Problems					50

A	SAFETY INFORMATION
	Important Safety Information				52
	L’information de Sécurité Importante					54
	Wichtige Sicherheitsinformationen					56
	Power Cord Set — Japan			57
B
	PIN-OUTS
	Null Modem Cable		59
	PC-AT Serial Cable		60
	Modem Cable	61
	RJ-45 Pin Assignments			61
C
	TECHNICAL SPECIFICATIONS
	Switch 3812, Switch 3824, and Switch 3848						63
D
	OBTAINING SUPPORT FOR YOUR PRODUCT
	Register Your Product to Gain Service Benefits						65
	Purchase Value-Added Services				65
	Troubleshoot Online		65
	Access Software Downloads				66
	Contact Us	66
	Telephone Technical Support and Repair 66

INDEX

REGULATORY NOTICES

ABOUT THIS GUIDE

This guide provides all the information you need to install and use 3Com® SuperStack® 3 Switch 3812 (3C17401), Switch 3824 (3C17400), or Switch 3848 (3CR17402-91) in its default state.

The guide is intended for use by network administrators who are responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks).

Please refer to the CD-ROM that accompanies your Switch for the following:

■Management Interface Reference Guide — an online guide which gives you detailed information on how to use the web interface and command line interface to manage the Switch.

■Other documentation relating to the 3Com SuperStack 3 Switch 3812, Switch 3824, or Switch 3848.

■3Com Network Supervisor — a powerful network management tool for small to medium enterprise networks.

■A number of other useful applications.

If the information in the release notes that are shipped with your product differ from the information in this guide, follow the instructions in the release notes.

Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com World Wide Web site:

http://www.3com.com/

8 ABOUT THIS GUIDE

Conventions	Table 1 and Table 2 list conventions that are used throughout this guide.
	Table 1	Notice Icons
	Icon	Notice Type	Description
		Information note	Information that describes important features or
			instructions.
		Caution	Information that alerts you to potential loss of data or
			potential damage to an application, system, or device.
		Warning	Information that alerts you to potential personal
			injury.

Table 2 Text Conventions

Convention	Description
Screen displays	This typeface represents information as it appears on the
	screen.
Syntax	The word “syntax” means that you must evaluate the syntax
	provided and then supply the appropriate values for the
	placeholders that appear in angle brackets. Example:
	To change your password, use the following syntax:
	system password <password>
	In this example, you must supply a password for <password>.
Commands	The word “command” means that you must enter the
	command exactly as shown and then press Return or Enter.
	Commands appear in bold. Example:
	To display port information, enter the following command:
	bridge port detail
The words “enter”	When you see the word “enter” in this guide, you must type
and “type”	something, and then press Return or Enter. Do not press
	Return or Enter when an instruction simply says “type.”
Keyboard key names	If you must press two or more keys simultaneously, the key
	names are linked with a plus sign (+). Example:
	Press Ctrl+Alt+Del
Words in italics	Italics are used to:
	■ Emphasize a point.
	■ Denote a new term at the place where it is defined in the
	text.
	■ Identify menu names, menu commands, and software
	button names. Examples:
	From the Help menu, select Contents.
	Click OK.

Related Documentation

9

Related	In addition to this guide, each Switch documentation set includes the
Documentation	following:
	■ Management Quick Reference Guide
		This guide contains:
		■ a list of software features supported by each Switch.
		■ a summary of the web interface and command line interface
		commands for the Switch.
	■	Release Notes
		These notes provide information about the current software release,
		including new features, modifications, and known problems.
	■	Switch Implementation Guide
		This guide contains information on the features supported by your

Switch and how they can be used to optimize your network. It is supplied in PDF format on the CD-ROM that accompanies the Switch.

■ Management Interface Reference Guide

This guide provides detailed information about the web interface and command line interface that enable you to manage the Switch. It is supplied in HTML format on the CD-ROM that accompanies the Switch.

There are other publications you may find useful:

■ Documentation accompanying the SFP Transceivers.

■ Documentation accompanying 3Com Network Supervisor. This is supplied on the CD-ROM that accompanies the Switch.

Accessing Online The CD-ROM supplied with your Switch contains the following online Documentation documentation:

■Switch Implementation Guide (PDF format).

■Switch Management Interface Reference Guide (HTML format).

■Other documentation relating to the Switch 3812, Switch 3824, or Switch 3848 (PDF format).

10 ABOUT THIS GUIDE

To access the online documentation from the CD-ROM:

1Insert the CD-ROM into the relevant CD-ROM drive. If your PC has auto-run enabled, a splash screen will be displayed automatically.

2Select the Documentation section from the contents page.

If the online documentation is to be accessed from a local drive or server, you will need to access the CD-ROM contents via the root directory and copy the files from the CD-ROM to a suitable directory.

■The HTML Reference Guide is stored in the Docs/referenceguide on the CD-ROM. The documentation is accessed using the index.htm file.

■The PDF Implementation Guide is stored in the Docs/implementation directory of the CD-ROM.

	3Com recommends that you copy the Docs/referenceguide
	directory as a whole to maintain the structure of the files.
Documentation	Your suggestions are very important to us. They will help make our
Comments	documentation more useful to you. Please e-mail comments about this
	document to 3Com at:
	[e-mail]
	Please include the following information when commenting: Document
	title, Document part number (on the title page) and Page number (if
	appropriate).
	Example:
	Part Number DUA1740-0AAA03
	SuperStack 3 Switch 3812, Switch 3824, and Switch 3848 Getting
	Started Guide
	Page 10

1	INTRODUCING THE SUPERSTACK 3
	SWITCH 3812, SWITCH 3824, AND

SWITCH 3848

This chapter contains introductory information about the Switch 3812, Switch 3824, and Switch 3848 and how they can be used in your network. It covers summary information about the hardware and the following topics:

■About the Switch

■Switch — Front View Detail

■Switch — Rear View Detail

■Default Settings

12 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848

About the Switch The Switch 3812, Switch 3824 and Switch 3848 units are 10/100/1000 Mbps Ethernet Switches which consist of either:

■12 10BASE-T/100BASE-TX/1000BASE-T RJ-45 ports (Switch 3812) or

■24 10BASE-T/100BASE-TX/1000BASE-T RJ-45 ports (Switch 3824) or

■48 10BASE-T/100BASE-TX/1000BASE-T RJ-45 ports (Switch 3848) and:

■Four SFP ports

The highest four numbered RJ-45 ports are combination ports. When an SFP module is inserted it has priority over the 10/100/1000 port of the same number (9–12 on the Switch 3812, 21–24 on the Switch 3824, and 45-48 on the Switch 3848).

For information about using the software features of the Switch, refer to the “Switch Management Interface Reference Guide” on the CD-ROM that accompanies the Switch.

Summary of Table 3 summarizes the hardware features that are supported by the Hardware Features Switch 3812, Switch 3824, and Switch 3848.

Table 3 Hardware features

Feature	Switch 3812, Switch 3824, and Switch 3848
MAC Addresses	Up to 16,000 supported
Forwarding Modes	Store and Forward
Auto-negotiation	Supported on all ports
Auto MDI/MDIX	Supported on all 10/100/1000 ports
Duplex Modes	Half and full duplex on all 10/100/1000 ports when
	running at 10 Mbps or 100 Mbps.
SFP Gigabit Ethernet	Supports fiber Gigabit Ethernet short-wave (SX),
Ports	long-wave (LX) and long-haul (LH70) transceivers in any
	combination
Flow Control	Supported on all ports
Traffic Prioritization	Supported (IEEE Std 802.1D, 1998 Edition)
	Eight traffic queues per port
Fast Ethernet and	Auto-negotiating 10BASE-T/100BASE-TX/1000BASE-T
Gigabit Ethernet Ports	and SFP ports

Switch — Front View Detail 13

Feature	Switch 3812, Switch 3824, and Switch 3848
RPS Support	Connects to SuperStack 3 Advanced Redundant Power
	System (ARPS). (Switch 3848 only)
Mounting	19-inch rack or stand-alone mounting

Switch — Front

View Detail

Figure 1 Switch 3812 — front view

Figure 2 Switch 3824 — front view

14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848

Figure 3 Switch 3848 — front view

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network. Only connect RJ-45 data connectors, network telephony systems, or network telephones to these sockets.

Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets.

10BASE-T/ The 10BASE-T/100BASE-TX/1000BASE-T ports have RJ-45 connectors and 100BASE-TX/ are configured as Auto MDIX (cross-over).

1000BASE-T Ports

The default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes of a link are automatically detected to provide the highest available bandwidth with the link partner.

Alternatively, auto-negotiation can be disabled. These ports can be manually configured to 10 Mbps half duplex, 100 Mbps half duplex, 10 Mbps full duplex or 100 Mbps full duplex. It is not possible to

manually configure a 1000 Mbps link as auto-negotiation is mandatory in the 1000 Mbps standard. If auto-negotiation is disabled, Auto MDIX cannot function and the ports are fixed as MDIX (cross-over) mode.

If auto-negotiation is disabled on a 1000 Mbps port, the speed will drop to the highest available speed. By default this is 100 Mbps.

Dual Personality SFP The four Dual Personality SFP (Small Form Factor Pluggable) ports support Ports fiber Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul

(LH70) transceivers in any combination. This offers you the flexibility of

Switch — Front View Detail 15

using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high capacity aggregated link backbone connection.

The SFP ports are capable of auto-negotiating flow control. As the speed and duplex modes are fixed by the media type, only the flow control is negotiated with the link partner. Alternatively, auto-negotiation can be disabled and the flow control setting can be manually configured.

Console Port The console port allows you to connect a terminal and perform remote or local out-of-band management. The Switch 3812 and Switch 3824 have a DB-9 serial connector and need a serial cable to connect to your PC.

The Switch 3848 has an RJ-45 serial port and is supplied with an RJ-45 to DB-9 cable.

The standard null modem cable is set to autobaud (up to a maximum of 19,200 baud), 8 data bits, no parity and 1 stop bit.

LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their status according to color. For information on using the LEDs for problem solving, see “Checking for Correct Operation of LEDs” on page 23.

Table 4	LED behavior
LED	Color	Indicates
Port Status/Packet LEDs
	Green	A high speed (1000 Mbps) link is present, and the port
		is enabled.
	Green flashing	A high speed (1000 Mbps) link is present and active.
	Yellow	A low speed (10/100 Mbps) link is present, and the
		port is enabled.
	Yellow flashing	A low speed (10/100 Mbps) link is present and active.
	Green for one	POST in operation, all LEDs perform a one second lamp
	second, Amber	test.
	for one second,
	then OFF until
	operational.
	Alternate yellow	A port has failed a loop back test during POST.
	then green
	flashing (fast)
	Alternate yellow	A link is present but the port has been disabled.
	then green
	flashing

16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848

LED	Color	Indicates
	Off	No link is present.
Power LED (Switch 3812 and Switch 3824)
	Green	The Switch is powered-up and operating normally.
	Red	The Switch has a fault with the Power Supply Unit.
	Off	The Switch is not receiving power or there is a fault
		with the Power Supply Unit.
Self Test LED (Switch 3812 and Switch 3824)
	Green flashing	There is a test in progress.
	Green	All tests have been passed and the Switch is ready for
		use.
	Red	A fault has occurred.
	Red flashing	An internal fan has failed.
	Off	The unit is booting-up.
Power/Self Test LED (Switch 3848 only)
	Green	The Switch is powered-up and operating normally.
	Green flashing	The Switch is either downloading software or is
		initializing (which includes running a Power On Self
		Test).
	Yellow	The Switch is faulty.
	Off	The Switch is not receiving power or there is a fault
		with the Power Supply unit.
Fault LED (Switch 3848 only)
	Red	The Switch and/or the PSU are above critical
		temperature but below critical shut down temperature.
		Fans are operating normally.
	Off	The Switch and PSU are below critical temperature.
		One or more fans have failed.

Switch — Rear View

Detail

Figure 4 Switch 3812 and Switch 3824 — rear view

Default Settings 17

Figure 5 Switch 3848 — rear view

Power Socket

Redundant Power System Socket

Power Socket Each Power Supply automatically adjusts its power setting to any power voltage in the range 100-240 VAC.

Redundant Power To protect against internal power supply failure, you can use this socket System Socket to connect the Switch to a SuperStack 3 Advanced Redundant Power (Switch 3848 only) System. See “Connecting a Redundant Power Supply (Switch 3848 only)”

on page 23.

Default Settings Table 5 shows the default settings for the Switch 3812, Switch 3824 and Switch 3848. If you initialize one of the Switch units, it is returned to these defaults.

Table 5 Default Settings

Feature	Switch 3812, Switch 3824, or Switch 3848
Port Status	Enabled
Port Speed	Auto-negotiated
Duplex Mode	Auto-negotiated
Flow Control	Disabled
Broadcast Storm Control	Enabled
	Threshold: 3000 broadcast frames per second
Virtual LANs (VLANs)	All ports belong to the untagged Default VLAN
	(VLAN 1)
Multicast Filtering	IGMP filtering enabled
Rapid Spanning Tree Protocol	Enabled
Link Aggregation Control	Disabled per port
Protocol (LACP)
Spanning Tree Protocol	Enabled
Smart Auto-sensing	Enabled

18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848

If you initialize a Switch unit by selecting System > Control > Initialize in the Web interface or by entering system control initialize in the Command Line Interface, the following settings are retained to allow you to connect to and manage the Switch:

■IP Address

■Subnet Mask

■Default Gateway

2	INSTALLING THE SWITCH

This chapter contains the information you need to install and set up the Switch 3812, Switch 3824, or Switch 3848. It covers the following topics:

■Package Contents

■Choosing a Suitable Site

■Rack-mounting

■Placing Units On Top of Each Other

■The Power-up Sequence

■SFP Operation

WARNING: Safety Information. Before installing or removing any components from the Switch or carrying out any maintenance procedures, you must read the safety information provided in Appendix A of this guide.

AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever tout composant de Switch ou d'entamer une procédure de maintenance, lisez les informations relatives à la sécurité qui se trouvent dans l'Appendice A de ce guide.

VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus dem Schalter entfernen oder den Schalter hinzufügen oder Instandhaltungsarbeiten verrichten, lesen Sie die Sicherheitsanweisungen, die in Anhang A in diesem Handbuch aufgeführt sind.

20 CHAPTER 2: INSTALLING THE SWITCH

Package Contents	■	Switch unit
	■	CD-ROM
	■	This Guide
	■ Management Quick Reference Guide
	■	Release Notes
	■	Warranty Flyer
	■	Power Cord
	■ 2 x securing brackets
	■ 4 x screws (Switch 3812 and Switch 3824)
	■ 8 x screws (Switch 3848)
	■ 4 x rubber feet
	■ RJ45 to DB9 converter cable (Switch 3848 only)
Choosing a Suitable	The Switch is suited for use in an internal wiring closet, a network room,
Site	or telecommunications room, where it can be mounted in a standard
	19-inch equipment rack, or free-standing.

CAUTION: Ensure that the ventilation holes are not obstructed.

The Switch 3848 is fitted with high speed fans that have a high audible output while running at full speed. The Switch is designed to reduce the fan speed shortly after power on (if thermal conditions allow) which will also reduce the fan noise generated.

When deciding where to position the Switch, ensure that: ■ Cabling is located away from:

■ sources of electrical noise such as radios, transmitters and broadband amplifiers.

■ power lines and fluorescent lighting fixtures.

■ The Switch is accessible and cables can be connected easily.

■ Water or moisture cannot enter the case of the Switch.

■ Air flow is not restricted around the Switch or through the vents in the side of the Switch. 3Com recommends that you provide a minimum of 25 mm (1 in.) clearance.

■ Air temperature around the Switch does not exceed 40 °C (104 °F).

Rack-mounting 21

If the Switch is installed in a 19-inch rack or closed assembly its local air temperature may be greater than room ambient temperature.

■ The air is as free from dust as possible.

■ The Switch is situated away from sources of conductive (electrical) dust, for example laser printers.

	■ The unit is installed in a clean, air conditioned environment.
	■ The AC supply used by the Switch is separate to that used by units
	that generate high levels of AC noise, for example air conditioning
	units.
	■ No more than four Switch units are placed on top of one another, if
	the units are free-standing.
Rack-mounting	The Switch is 1U high and will fit in most standard 19-inch racks.
	CAUTION: Disconnect all cables from the Switch before continuing.
	Remove all self adhesive pads from the underside of the Switch if they
	have been fitted.
	CAUTION: If you use a shelf or support ensure that it will not obstruct
	the air flow through the side panels of the Switch.
	To rack-mount your Switch:
	1 Place the Switch the right way up on a hard flat surface, with the front
	facing towards you.
	2 Locate a securing bracket over the mounting holes on one side of the
	Switch, as shown in Figure 6.
	3 Insert the screws and tighten with a suitable screwdriver.

22 CHAPTER 2: INSTALLING THE SWITCH

Figure 6 Fitting a bracket for rack-mounting

You must use the screws supplied with the securing brackets. Damage caused to the unit by using incorrect screws invalidates your warranty.

4Repeat steps 2 and 3 for the other side of the Switch.

5Insert the Switch into the 19-inch rack and secure with suitable screws (not provided). Ensure that ventilation holes are not obstructed.

6Connect network cabling.

Placing Units On If the Switch units are free-standing, up to four units can be placed one Top of Each Other on top of the other. If you are mixing a variety of Switch and Hub units,

the smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the self-adhesive rubber pads supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other.