3com 3C16120 - SuperStack 3 Server Load Balancer User manual

Category
Servers
Type
User manual
http://www.3com.com/
Part No. 990-0049-00
Published June 2001
SuperStack
®
3
Server Load Balancer
Server Load Balancer Plus
User Guide
3C16120
3C16121
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3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
Copyright © 2001, 3Com Technologies. 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 Technologies.
3Com Technologies reserves the right to revise this documentation and to make changes in content from time
to time without obligation on the part of 3Com Technologies to provide notification of such revision or
change.
3Com Technologies provides this documentation without warranty, term, or condition of any kind, either
implied or expressed, including, but not limited to, the implied warranties, terms or conditions of
merchantability, satisfactory quality, 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.
If there is any software on removable media described in this documentation, it is furnished under a license
agreement included in the hard copy documentation.
UNITED STATES GOVERNMENT LEGEND
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 3Coms 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.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may
not be registered in other countries.
3Com, and SuperStack are registered trademarks of 3Com Corporation. The 3Com logo is a trademark of
3Com Corporation.
Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Novell
and NetWare are registered trademarks of Novell, Inc. Netscape Navigator is a registered trademark of
Netscape Communications. Javascript is a trademark of Sun Microsystems.
All other company and product names may be trademarks of the respective companies with which they are
associated.
ENVIRONMENTAL STATEMENT
It is the policy of 3Com Corporation to be environmentally-friendly in all operations. To uphold our policy, we
are committed to:
Establishing environmental performance standards that comply with national legislation and regulations.
Conserving energy, materials and natural resources in all operations.
Reducing the waste generated by all operations. Ensuring that all waste conforms to recognized environmental
standards. Maximizing the recyclable and reusable content of all products.
Ensuring that all products can be recycled, reused and disposed of safely.
Ensuring that all products are labelled according to recognized environmental standards.
Improving our environmental record on a continual basis.
End of Life Statement
3Com processes allow for the recovery, reclamation and safe disposal of all end-of-life electronic components.
Regulated Materials Statement
3Com products do not contain any hazardous or ozone-depleting material.
Environmental Statement about the Documentation
The documentation for this product is printed on paper that comes from sustainable, managed forests; it is
fully biodegradable and recyclable, and is completely chlorine-free. The varnish is environmentally-friendly, and
the inks are vegetable-based with a low heavy-metal content.
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CONTENTS
ABOUT THIS GUIDE
Conventions 8
Related Documentation 9
Product Registration 9
Documentation Comments 9
1 INTRODUCING THE SERVER LOAD BALANCER
About the Server Load Balancer 12
Summary of Hardware Features 12
Summary of Software Features 12
Server Load Balancer Front View Detail 13
Ports 13
Console Port 13
LEDs 14
Server Load Balancer Rear View Detail 15
Unit Information Label 15
Power Socket 15
Advanced Redundant Power System Socket 15
Downloading 3Com Network Supervisor 16
2 INSTALLING THE SERVER LOAD BALANCER
Package Contents 18
Choosing a Suitable Site 18
Rack-mounting 19
Choosing the Correct Cables 20
Placing Units On Top of Each Other 20
The Power-up Sequence 21
Powering-up 21
Solving Problems Indicated by LEDs 22
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3 SETTING UP FOR MANAGEMENT
Methods of Managing the Server Load Balancer 24
Assigning an IP Address 24
4 WORKING WITH THE WEB INTERFACE
Choosing a Browser 28
Installing the JRE for Microsoft Internet Explorer 28
Installing the JRE for Netscape Navigator 29
Accessing the Web Interface 30
Exiting the Web interface 30
Using the Web Interface 31
Summary View 32
Device View 33
Logical View 35
Help View 37
Setting up SNMP Management 38
Specifying Community Strings 38
Modifying a Trap Address 38
Upgrading Operating Software 39
5 CONFIGURING NON-REDUNDANT SERVER LOAD BALANCING
Server Load Balancing Configuration Example 42
Configuring for Non-redundant Server Load Balancing 43
6 CONFIGURING REDUNDANT SERVER LOAD BALANCING
Redundant Server Load Balancing Configuration Example 46
Configuring for Active-Passive Redundancy 47
Configuring for Active-Active Redundancy 49
Active-Active Device Allocation 51
Setting Redundancy Settings 51
7 CONFIGURING CACHE REDIRECTION
Cache Redirection Configuration Example 54
Defining a Cache Subnet 55
Non-redundant Configuration 55
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Redundant Configuration 56
Adding a Cache 57
Assigning Caches to Services 57
Showing Status and Deleting the Cache 58
Creating a Cache Profile (Optional) 58
8 CONFIGURING FOR LOAD BALANCING
Defining a Server Subnet 62
Changing Lan Port Roles 63
Adding a Server 64
Adding a Service 65
Assigning Servers to Service 66
Showing Status and Deleting the Server 66
Assigning Server to Services (Advanced) 67
Adding a User Group 68
Adding IP Address Ranges to User Groups 68
Accessing Permissions 69
Creating a Balance Profile (Optional) 69
Modifying Security Filters (Attack Mitigation) 72
Modifying Security Filters 72
Modifying User Access 73
A SAFETY INFORMATION
Important Safety Information 76
Linformation de Sécurité Importante 78
Wichtige Sicherheitsinformationen 80
B TECHNICAL SPECIFICATIONS AND PIN-OUTS
Server Load Balancer Specifications 83
Console Port Cable 84
PC-AT Serial 84
C TECHNICAL SUPPORT
Online Technical Services 85
World Wide Web Site 85
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3Com Knowledgebase Web Services 85
3Com FTP Site 86
Support from Your Network Supplier 86
Support from 3Com 87
Returning Products for Repair 89
INDEX
3COM CORPORATION LIFETIME LIMITED WARRANTY
REGULATORY NOTICES
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ABOUT THIS GUIDE
This guide provides all the information you need to install and use a
SuperStack
®
3 Server Load Balancer (3C16120) or the SuperStack 3
Server Load Balancer Plus (3C16121) to perform server load balancing,
both non-redundant and redundant, and cache redirection.
The guide is intended for use by network administrators who are
responsible for installing and setting up network equipment.
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/
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8 ABOUT THIS GUIDE
Conventions Table 1 and Table 2 list conventions that are used throughout this guide.
Ta b l e 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.
Ta b l e 2 Text Conventions
Convention Description
boldface
This typeface represents user input. Example:
At the login: prompt, enter
admin.
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>.
The words enter
and type
When you see the word enter in this guide, you must 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.
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Related Documentation 9
Related
Documentation
In addition to this guide, the documentation set includes the following:
Release Notes (PDF format)
These notes provide information about the current software release,
including new features, modifications, and known problems. These
release notes are available in PDF format and are accessible from the
3Com web site.
There are other publications you may find useful, such as:
Documentation accompanying the Advanced Redundant Power
System.
Documentation accompanying the 3Com® Network Supervisor.
Product
Registration
You can register your SuperStack 3 Server Load Balancer on the 3Com
Web site to receive up-to-date information on your product:
http://support.3com.com/registration/frontpg.pl
Documentation
Comments
Your suggestions are very important to us. They will help make our
documentation more useful to you. Please e-mail comments about this
document to 3Com at:
pddtechpubs_comments@3com.com
Please include the following information when commenting:
Document title
Document part number (on the title page)
Page number (if appropriate)
Example:
SuperStack 3 Server Load Balancer and Server Load Balancer Plus User
Guide
Part Number 990-XXXX-XX
Page 21
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10 ABOUT THIS GUIDE
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1
INTRODUCING THE SERVER LOAD
BALANCER
This chapter contains introductory information about the SuperStack® 3
Server Load Balancer and the SuperStack 3 Server Load Balancer Plus. It
covers summaries of the following topics:
About the Server Load Balancer
Server Load Balancer Front View Detail
Server Load Balancer Rear View Detail
Downloading 3Com Network Supervisor
Unless otherwise noted, the information in this chapter applies to both
the Server Load Balancer and the Server Load Balancer Plus.
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12 CHAPTER 1: INTRODUCING THE SERVER LOAD BALANCER
About the Server
Load Balancer
The SuperStack
®
3 Server Load Balancer and Server Load Balancer Plus
provide support for connecting multiple high-performance servers to a
Gigabit backbone and providing server load balancing, cache redirection
and security functionality.
Summary of
Hardware Features
Table 3 summarizes the hardware features that are supported in both
models of the Server Load Balancer.
Summary of Software
Features
Table 4 summarizes the software features that are supported in both
models of the Server Load Balancer.
Ta b l e 3 Hardware Features
Feature
Server Load Balancer
Server Load Balancer Plus
Memory 64 MB for Server Load Balancer Plus
32 MB for Server Load Balancer
12 10/100 LAN Ports Supported
2 Gigabit Ethernet Ports Supported
SuperStack 3 Architecture Connects to a SuperStack 3 Advanced
Redundant Power System (ARPS)
Installs in a 19-inch rack or stand-alone
mounting
Ta b l e 4 Software Features
Feature
Server Load Balancer
Server Load Balancer Plus
Algorithms Round Robin
Weighted Round Robin
Least Connections
Quickest Last Response
Quickest Average Response
Weighted Percentage
Port Trunking (Etherchannel) Supported
Up to 256 servers Supported
TCP/IP Sessions 16,000 for the Server Load Balancer
128,000 for the Server Load Balancer Plus
Persistence Modes Source IP
Secure Socket Layer (SSL) Session ID
Cookie
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Server Load Balancer — Front View Detail 13
Server Load
Balancer Front
View Detail
Figure 1 Server Load Balancer front view
Ports The Server Load Balancer and Server Load Balancer Plus have twelve
dedicated 10BASE-T/100BASE-TX ports and two 1000BASE-SX ports.
Console Port The console port allows you to use a terminal or serial PC connector to
access the command line interface (CLI). The CLI allows you to assign the
IP address to the Service Load Balancer and provides basic configuration
capabilities. For console port pin-out information, see Appendix B.
Cache Redirection Transparent mode
Proxy mode
DoS Protection Supported
Redundant Failover Modes Primary/Secondary
Active/Active
Management Web interface, command line interface, and
SNMP supported
Ta b l e 4 Software Features
Feature
Server Load Balancer
Server Load Balancer Plus
1 2 3 4 5 6 7 8 9 121110
1 2 3 4 5 6 7 8 9 121110
1413
1413
1000BASE-SX Ports
Console Port
10BASE-T/100BASE-TX
Port Status LEDs
1000BASE-SX
Port Status LEDs
Power Self-Test LED
Power LED
10BASE-T/100BASE-TX Ports
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14 CHAPTER 1: INTRODUCING THE SERVER LOAD BALANCER
LEDs Table 5 lists LEDs visible on the front of the Server Load Balancer, and how
to read their status according to color.
Ta b l e 5 LED Behavior
LED Color Indicates
Power/Self Test LED
Yellow The Server Load Balancer has failed its Power On Self
Test (POST) or a failure is detected in the runtime.
Yellow flashing The Server Load Balancer is running POST.
Off No fault has been detected.
Power LED
Green The Server Load Balancer is receiving power.
Green flashing The Server Load Balancer is receiving power and
downloading new operating software.
Off The Server Load Balancer is not receiving power.
10/100BASE-T Port Status LEDs
Packet Yellow Packets are being transmitted/received on the port.
Off No packets are being transmitted/received on the port.
Status Green A link is present and the port is enabled.
Green flashing The port is disabled.
Off No link is present.
1000BASE-SX Port Status LEDs
Packet Yellow Packets are being transmitted/received on the port.
Off No packets are being transmitted/received on the port.
Status Green A high speed (1000 Mbps) link is present, and the port
is enabled.
Green flashing A high speed (1000 Mbps) port is disabled.
Off No link is present.
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Server Load Balancer Rear View Detail 15
Server Load
Balancer Rear
View Detail
Figure 2 Server Load Balancer rear view
Unit Information
Label
The labels on the rear of the unit show the following:
The 3Com product name of the Server Load Balancer
The 3Com 3C number of the Server Load Balancer
The unique MAC address (Ethernet address) of the Server Load
Balancer
The serial number of the Server Load Balancer
You may need this information for fault reporting purposes.
Power Socket The Server Load Balancer automatically adjusts its power setting to any
supply voltage in the range 90-240 VAC.
Advanced Redundant
Power System Socket
To protect against internal power supply failure, you can use this socket
to connect a Advanced Redundant Power System (ARPS) (part number
3C16075) to the Server Load Balancer. For more information on the
Advanced Redundant Power System, see the documentation shipped
with the power system.
For normal redundancy, the unit requires one Type 3 Power Module (part
number 3C16075).
For full redundancy, the unit requires two Type 3 Power Modules
combined using a Type 3 Y-Cable (part number 3C16077).
Laser warning and
Supply warning Label
Redundant Power System Socket
Power Socket
Unit Information Label
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16 CHAPTER 1: INTRODUCING THE SERVER LOAD BALANCER
CAUTION: The Server Load Balancer can only use a SuperStack
Advanced Redundant Power System output.
WARNING: If you are connecting the Server Load Balancer to a ARPS
Type 3 Power Module, read the Safety Information section in the
documentation shipped with the power system.
CAUTION: The Server Load Balancer has no ON/OFF switch; the only
method of connecting or disconnecting main power is by connecting or
disconnecting the power cord.
Downloading 3Com
Network Supervisor
You can download 3Com Network Supervisor Version 3.0 from the
following Web address:
http://www.3com.com/tns
Network Supervisor is a powerful, intuitive network management
application for small to medium enterprise networks.
Network Supervisor automatically discovers up to 1500 network devices
and shows devices and connections on a graphical display. Network
managers can view network activity, monitor stress and set thresholds
and alerts. This information helps to provide the most efficient,
cost-effective use of network resources.
Version 3.0 adds significant extra functionality designed to detect
network inefficiency and optimize network performance. Features
include support for related and recurring events, user definable reports,
auto-alerting using pager or SMS messages and simple updates from the
3Com Web site.
3Com Network Supervisor offers Telnet and Web device management.
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2
INSTALLING THE SERVER LOAD
BALANCER
This chapter contains the information you need to install and set up the
Server Load Balancer. It covers the following topics:
Package Contents
Choosing a Suitable Site
Rack-mounting
Placing Units On Top of Each Other
The Power-up Sequence
Solving Problems Indicated by LEDs
WARNING: Safety Information. Before installing or removing any
components from the Server Load Balancer or carrying out any
maintenance procedures, you must read the safety information provided
in Appendix A of this guide.
AVERTISSEMENT: Consignes decuri. Avant d'installer ou d'enlever
tout composant du Server Load Balancer ou d'entamer une procédure de
maintenance, lisez les informations relatives à la sécurité qui se trouvent
dans l'Appendice A de ce guide.
WARNHINWEIS: Sicherheitsinformationen. Bevor Sie Komponenten
aus dem Server Load Balancer entfernen oder dem Server Load Balancer
hinzufuegen oder Instandhaltungsarbeiten verrichten, lesen Sie die
Sicherheitsanweisungen, die in Appendix A (Anhang A) in diesem
Handbuch aufgefuehrt sind.
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18 CHAPTER 2: INSTALLING THE SERVER LOAD BALANCER
Package Contents Your shipping container should contain the following items:
Server Load Balancer (3C11620)
or Server Load Balancer Plus (3C11621)
User Guide (this guide)
Power Cord
2 x mounting brackets
6 x screws
4 x rubber feet
Choosing a Suitable
Site
The Server Load Balancer is suited for use where it can be mounted in a
standard 19-inch equipment rack, or free-standing. A rack-mounting kit,
containing two mounting brackets and six screws is supplied with the
unit.
CAUTION: Ensure that the ventilation holes are not obstructed.
When deciding where to position the Server Load Balancer, ensure that:
Cabling is located away from sources of electrical noise such as radios,
transmitters and broadband amplifiers.
Cabling is located away from power lines and fluorescent lighting
fixtures
The Server Load Balancer is accessible and cables can be connected
easily.
Water or moisture cannot enter the case of the Server Load Balancer.
Air-flow is not restricted around the Server Load Balancer or through
the vents in the side of the Server Load Balancer. 3Com recommends
that you provide a minimum of 25 mm (1 in.) clearance.
The air is as free from dust as possible.
No more than four Server Load Balancer units are placed on top of
one another, if the units are free-standing.
Temperature operating limits are not exceeded. It is recommended
that the unit is installed in a clean, air conditioned environment.
Ensure there is adequate clearance at the front of the unit to ensure
that the fibers are not damaged as they have a restricted bend radius.
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Rack-mounting 19
Rack-mounting The Server Load Balancer is 1.5U and fits in most standard 19-inch racks.
However, if you are connecting the Server Load Balancer to a ARPS Type 3
power module, a runner, shelf or tray is recommended to support the
additional weight. You will need to allow a 2U space within the rack for
each Server Load Balancer.
WARNING: The rack-mount kits alone are not sufficient to support the
weight of the Server Load Balancer when attached to an ARPS power
module. It is recommended that you use a runner, shelf or tray to support
the total weight. The rack mount kits must not be used to suspend the
Server Load Balancer from under a table or desk, or attach it to a wall.
CAUTION: You must use a full depth shelf or support that will not
obstruct the air flow through the side panels of the Server Load Balancer.
CAUTION: Disconnect all cables from the Server Load Balancer before
continuing. Remove all self adhesive pads from the underside of the
Server Load Balancer if they have been fitted.
To rack-mount your Server Load Balancer:
1 Place the unit the right way up on a hard flat surface, with the front
facing towards you.
2 Locate a mounting bracket over the mounting holes on one side of the
unit, as shown in Figure 3.
Figure 3 Fitting a bracket for rack-mounting
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20 CHAPTER 2: INSTALLING THE SERVER LOAD BALANCER
You must use the screws supplied with the mounting brackets. Damage
caused to the unit by using incorrect screws invalidates your warranty.
3 Insert the three screws and tighten with a suitable screwdriver.
4 Repeat steps 2 and 3 for the other side of the unit.
5 Insert the unit into the 19-inch rack and secure with suitable screws (not
provided). Ensure that ventilation holes are not obstructed.
6 Connect network cabling.
Choosing the
Correct Cables
The 1000BASE-FX fiber optic LAN ports (Ports 13 and 14) on the Server
Load Balancer use SC connectors. The 10BASE-T/100BASE-TX copper
LAN ports (Ports 1 through 12) use RJ45 connectors.
Table 6 explains cables to use before connecting a device to the copper
ports.
1
Cables are not supplied by 3Com.
Placing Units On
Top of Each Other
If the units are free-standing, up to four units can be placed one on top
of the other.
If you are placing units one on top of the other, you must use the
self-adhesive rubber feet supplied. Apply the feet to the underside of
each unit, sticking one in the marked area at each corner. Place the units
on top of each other, ensuring that the feet of the upper unit line up with
the recesses of the lower unit.
Ta b l e 6 Cabling for Copper Ports
Device to Connect: Use this Cable:
Another Server Load Balancer, a
network switch or router
Crossover cable
1
End Station (such as a server or
a PC)
Straight-through cable
1
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3com 3C16120 - SuperStack 3 Server Load Balancer User manual

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Servers
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