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Kvm Switch Solutions WHITE PAPER KVM SWITCH SOLUTIONS A guide to evaluating KVM Switches from Network Technologies Inc INTRODUCTION Network Technologies Inc (NTI) recognizes that advances in computer technology, and the growing importance of the Internet in commercial transactions, have resulted in computer networks becoming more critical to businesses than ever before. Businesses today have increasing demands for space, equipment, and productive use of network administration personnel. Customers need a method to control multiple computers efficiently. KVM (keyboard-video-mouse) Switches can provide flexible, efficient control of multiple computers while helping to minimize floorspace, equipment, environmental and administration costs. This White Paper explains: The purpose of KVM Switches. The technological development of KVM switches and how they work today. Design issues in choosing a KVM switch. How NTI, through its commitment to research and development of innovative KVM solutions, has addressed these design issues. What the future holds for KVM switch technology. The first section, “Simply Put,” provides an introduction to KVM switches, including the issues to be considered in determining the KVM Switch solution that will best meet your needs. The second section, “Technically Speaking,” is designed to provide a more detailed explanation of the technology utilized by KVM switches and how it impacts performance. TABLE OF CONTENTS Simply Put ______________________________________________________________________________ 1 What is a KVM Switch? _________________________________________________________________________ 1 KVM Switches in a Network Environment __________________________________________________________ 2 Networks Utilizing a Windows Operating System ______________________________________________________________2 Networks Utilizing a UNIX Operating System_________________________________________________________________2 Benefits of Using a KVM Switch___________________________________________________________________ 3 Design Issues: What Makes a Good KVM Switch? ___________________________________________________ 4 Performance Concerns ___________________________________________________________________________________4 Flexibility _____________________________________________________________________________________________4 Security _______________________________________________________________________________________________5 Design Goals ___________________________________________________________________________________ 6 NTI’s KVM Switch Implementation _______________________________________________________________ 6 Reliability _____________________________________________________________________________________________6 Control of Costs ________________________________________________________________________________________6 Efficiency and Flexibility _________________________________________________________________________________8 Analyzing Your Needs __________________________________________________________________________ 11 Deciding Which KVM Switch Fits the Environment ___________________________________________________________11 Future Trends in KVM Switch Technology_________________________________________________________ 12 USB_________________________________________________________________________________________________12 IEEE 1394 (FireWire®) _________________________________________________________________________________12 Off-Site Remote _______________________________________________________________________________________12 Flat Panel Display______________________________________________________________________________________13 Internet Keyboards _____________________________________________________________________________________13 DDC ________________________________________________________________________________________________13 Other NTI Features of Note _____________________________________________________________________ 13 Testing ______________________________________________________________________________________________13 Certification __________________________________________________________________________________________13 International __________________________________________________________________________________________13 Rackmount ___________________________________________________________________________________________13 Message Board ________________________________________________________________________________________14 NTI KVM Configurator _________________________________________________________________________________14 Technically Speaking_____________________________________________________________________ 15 Evolution of KVM Switching ____________________________________________________________________ 15 Mechanical KVM Switches ______________________________________________________________________________15 Electronic KVM Switches _______________________________________________________________________________15 Appendix A _____________________________________________________________________________ 28 Glossary _______________________________________________________________________________ 30 Copyright ______________________________________________________________________________ 34 TABLE OF FIGURES Figure 1 – Basic KVM switch configuration ___________________________ 1 Figure 2 – Diagram of a Server-Based Network Configuration_____________ 2 Figure 3 – Addition of KVM Switches to a Server-Based Network _________ 2 Figure 4 – Reconfigured server setup with three KVM switch controls ______ 3 Figure 5 – Energy Savings_________________________________________ 4 Figure 6 – KVM Switch used in a Cascade Application __________________ 7 Figure 7A – Cat5 KVM Extender Application ________________________ 10 Figure 7B – Cat5 Video Only Application____________________________ 10 Figure 8 – Matrix KVM switches provide multiple user control ___________ 10 Figure 9 – Shared Processors ______________________________________ 16 Figure 10 – Dedicated Processors __________________________________ 17 Figure 11 – Basic layout of a Video Switching PCB____________________ 20 Figure 12 – Front Panel Push Buttons _______________________________ 23 Figure 13 – OSD Opening Screen __________________________________ 24 Figure 14 – LCD Front Panel______________________________________ 24 TABLES Table 1 – Keyboard Equivalency Translation _________________________ 19 Table 2 – Emulation Keystrokes for Sun’s 14 Extra Keys________________ 19 Table 3 – Sun Startup Keys _______________________________________ 19 CHAPTER 1 SIMPLY PUT 1 SIMPLY PUT WHAT IS A KVM SWITCH? KVM stands for: Keyboard – Video – Mouse. The primary purpose of a KVM switch is to control more than one computer with ONE keyboard, ONE mouse and ONE monitor (also known as a control console). This is achieved with no special software or hardware modifications to the attached computers. Control of the computer at all stages of operation is achieved by utilizing the keyboard, video and mouse ports. It may help to begin by defining what a KVM switch is NOT: • A KVM switch is not a software-based application such as PCAnywhere® or NetMeeting®. Software-based applications can be used to control the desktop of remote computers. However, these applications require that software be installed on each computer which will be accessed, which can interfere with other programs, and are not useful for working between different computer types and operating systems. They also do not allow the user to access the computer when the machine is at the BIOS level. • A KVM switch is not a Telnet or Serial terminal connection. These connections can provide control to some lower-level features from a distance, but don’t provide a GUI interface. • A KVM switch is not a network. KVM switches do not replace or eliminate the need for networking, but can work in conjunction with a network. KVM switches are a hardware-based solution to reduce the number of keyboards, monitors, and mice needed to control multiple computers. As illustrated in Figure 1, a KVM switch allows the user to control the selected computer (PC 2) via his or her keyboard and mouse, and view the video display from the selected computer on a monitor, as if directly connected. Select PC 1 at the switch, and you’ll see and control PC1 – Select PC2, and you’ll see and control PC 2. KVM switches are commonly used in environments where one user needs to operate two or more computers, or where one or more administrators manage multiple computers from a central location. These include data centers, network operating centers, server rooms, software development and testing labs, help desks, departmental LANs and any desktop with multiple computers. Some typical applications include: • A salesman wants to control a notebook computer using a desktop monitor, keyboard and mouse. • A graphic artist wants to control two computers of different platforms (i.e., a PC and a Mac®) without cluttering his or her desk with two keyboards, two mice and two monitors. Figure 1 - Basic KVM switch configuration • A network administrator wants the ability to control a large number of servers from both his office and the server room. 1 CHAPTER 1 SIMPLY PUT • A lab manager wants to be able to consolidate control of his lab computers and eliminate many keyboards, monitors and mice where space is at a premium. • A manufacturer wants to allow workers on the shop floor and loading dock to conveniently control computers located
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