Integrating TCP/IP iA *nets with IBMA (R) Data Centers is a focused and comprehensive handbook targeting the integration of IBM and compatible mainframes and AS/400s with Internet technology-based networks--iA *nets--including the Internet, intranets, and business-to-business extranets. The book is a valuable resource for those working to ensure that traditional IBM data centers play an integral role in the new Internet-dominated business world. This book offers an overview of the transition from SNA to SNA-capable iA *nets and the role of the latest SNA incarnation--High Performance Routing (HPR). It presents all the major technologies used to integrate SNA systems with TCP/IP: transport technologies, access technologies, user interface rejuvenation, programmatic solutions, and network infrastructure issues and techniques. The author provides detailed descriptions and evaluations of specific products and technologies, with summaries of the pros and cons of each and advice on how they fit into an overall solution.You will find coverage of important topics such as: *tn3270(E), ip3270, and tn5250 *3270-to-HTML conversion *Applet-based 3270/5250 emulation *Data Link Switching (DLSw) *Application servers *User-interface rejuvenation and AutoGUIs *HPR-over-IP and AnyNet *Channel-attached mainframe gateways *Maintaining security *Securing availability and response time *Ensuring network management, scalability, and accountability Real-world case studies of GM, TWA, Del Monte, and Lafayette Life Insurance illustrate how Internet technologies can minimize remote access costs while extending the reach and scope of mission-critical information that resides in mainframe data centers.
Numerous figures, topic summary sidebars, and tables summarizing product features give readers quick and easy access to vital information. Whether you are investigating the topic in general, are in the process of designing a solution, or researching specific technologies, Integrating TCP/IP iA *nets with IBMA (R) Data Centers will help you successfully accomplish your goals. 0201309912B04062001
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Für höhere Schule und Studium
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Höhe: 235 mm
Breite: 187 mm
Dicke: 20 mm
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ISBN-13
978-0-201-30991-1 (9780201309911)
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.
Schweitzer Klassifikation
Anura Guruge is an independent technical analyst and consultant who helps IBM's customers reengineer and overhaul their old, SNA-only networks. During his 25-year career, he has acquired first-hand, in-depth experience with SNA-capable i?nets, SNA/APPN/HPR/AnyNet, frame relay, token-ring switching, ATM, system management, and xDSL technologies. He is the founder and chairman of the SNA-Capable i?net Forum, conducts training seminars worldwide, and publishes the monthly Newsletter on Contemporary IBM Internetworking. His previous books include Reengineering IBM (R) Networks (1996) and SNA: Theory and Practice (1984).
0201309912AB04062001
Foreword.
Preface.
Acknowledgments.
1. Intranets and i?nets: The Next Generation of Enterprise Networks.
Intranet: Your Very Own Internet.
The Tantalizing Lure of Intranets.
Entranets Expedite Application Delivery.
The Lure of Intranets: A Reprise.
The Networking Fabric of Intranets.
The Internet Connection.
Immunizing Your Data Center for Internet-Based Access.
The Internet as a Global Storefront.
Business Process Reengineering Around i?nets.
A New Client/Server Model for Business Process Reengineering.
A Notion of a Web Applications Architecture for the IBM World.
Application-centric, Network-Neutral Computing.
Extending i?nets into the Data Center.
The Last Word.
2. SNA to SNA-Capable i?nets: SNA's Final Metamorphosis.
SNA-Oriented Data Centers and TCP/IP-Based Networks.
Reasons for the Demise of SNA-Oriented Networking.
Other Factors Contributing to SNA's Downfall.
The Role of SNA-LAN Gateways within SNA-Capable i?nets.
PU Controller Gateways.
PU Passthrough Gateways.
PU Concentrator Gateways.
HPR and HPR-Over-IP: SNA's Last Hurrah.
The Highlights of HPR.
Thumbnail Sketch of the HPR Architecture.
HPR-Over-IP.
The Last Word.
3. Differences Between SNA Networks and SNA-Capable i?nets.
The Availability of SNA-Capable i?nets.
Security Concerns Related to SNA-Capable i?nets.
Emulating SNA Routing Within SNA-Capable i?nets.
Maintaining Predictable Response Times with SNA-Capable i?nets.
Giving Priority to SNA Traffic.
Dealing with Congestion.
Scalability, Manageability, and Accountability.
The Last Word.
4. Integrating SNA/APPN with i?nets.
i?net Integration Technology--Here and Proven.
The Scope of SNA-Capable i?nets.
High-Level Overview of the Pertinent Technologies.
Different Horses for Different Courses.
Dismantling Full SNA Stacks.
DLSw--the Workhorse SNA Transport Scheme.
DLSw--More Than Just a TCP/IP Encapsulation Scheme.
DLSw's Principles of Operation for SNA/APPN Traffic.
Pros and Cons of DLSw Versus HPR-Over-IP.
AnyNet-Based SNA-to-TCP/IP Protocol Conversion.
Brief Overview of the AnyNet Protocol Conversion Process.
The Last Word.
5. Terminal-Based SNA Access Over i?nets.
Case Study: Mixing and Matching SNA Access Solutions.
SNA Access-Related Components and Component Tiering.
Additional Components Required for Security.
ip3270: An Alternative to tn3270(E).
tn3270(E) and tn5250--The "Old Faithful" of Access Schemes.
Overview of the tn3270(E)/tn5250 Functional Model.
RFCs Included in the Standard.
The Telnet Connection.
The Pros and Cons of tn3270(E)/tn5250.
3270-to-HTML Conversion: The Panacea for Internet Access.
The Operational Concepts of 3270-to-HTML Conversion.
Case Studies: 3270-to-HTML Conversion in Practice.
The Pros and Cons of 3270/5250-to-HTML Conversion.
Browser-Based SNA Access Using Applets for 3270/5250 Emulation.
The Operational Model for Applet-Based Emulation (with Case Study).
The Possible Need for an SNA-Web Gateway (with Case Study).
The Pros and Cons of Applet-Based 3270/5250 Emulation.
The Last Word.
6. User Interface Rejuvenation, Application-Specific.
Gateways, and Programmatic Access.
Rejuvenating the Dated 3270/5250 User Interface.
The Rejuvenation Process for 3270/5250-to-HTML Solutions.
The Rejuvenation Process for Applet-Based Solutions.
Two More Case Studies That Highlight User Interface Rejuvenation.
Application-Specific Web-to-SNA Gateways and Clients.
Examples of CICS-Specific Web-to-SNA Solutions.
The Pros and Cons of Application-Specific Solutions.
Programmatic or Application Server-Based Web-to-SNA Access.
Case Study of Programmatic SNA Access in the Insurance Sector.
Host On-Demand JavaBeans.
Bluestone's Sapphire/Web: An Example of a Web-Oriented Application Server.
The Last Word.
7. Network Infrastructure, Management, and New Mainframe Gateways.
Satisfying the Bandwidth Demands of SNA-Capable i?nets.
Options for LAN Bandwidth.
LAN Switching--A Short Tutorial.
The Bottom Line on LAN Bandwidth and SNA-Capable i?nets.
Options for Campus Bandwidth.
Options for WAN Bandwidth.
IP Switching to Increase WAN Performance.
Optimizing Data Center Bandwidth and Capacity.
Data Center Entities That Need Attention.
New Mainframe Gateways.
Managing SNA-Capable i?nets.
Continuing Need for Mainframe-Based Management.
Wrapping Up Management.
The Last Word.
8. Pulling It All Together.
Two More Case Studies Highlighting Trends and Security Options.
Multiple Levels of Security.
Trends Highlighted by the Case Studies.
Going Beyond the Remote Access Scenarios in the Case Studies.
Data Replication (with an Illustrative Case Study).
A Case Study on Maximizing Existing Investment Through Rejuvenation.
TCP/IP on the Mainframe.
Implementing Mission-Critical SNA-Capable i?nets--A Final Checklist.
An Operatic Case Study as the Finale.
The Last Word.
Acronyms and Abbreviations.
Glossary.
Bibliography.
Index. 0201309912T04062001
