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Summary
Summary
Cisco IOS software is the internetworking brain for Cisco switches and routers. Releases are consistantly evolving, being modified and enhanced, and this creates multiple versions that are viable. Different releases contain different features to accomodate the level of complexity of the various networks. A Engineers chooses the correct version by number and types of routers or switches in his network, the nature of business that is performed over the network, and the applications the network is supporting. They have difficulty in choosing the correct IOS version because there are so many and the naming conventions are complex. This book is the ultimate guide to determine how to optimize migration to new IOS releases. This book provides background on the evolution of IOS and explains the logical structure of its naming conventions. Detailed table indicate the features, uses migration paths, strengths, for each release so that you can choose the perfect release for your network.
Table of Contents
| I What Every Network Administer Should Know |
| 1 Evolution of the Cisco IOS System Architecture |
| Cisco IOS Definition |
| Move Toward Modularity |
| Division of Kernel and Network Services |
| Development History |
| The Early System Architecture |
| Evolution to Modular Architecture |
| Solid State Architecture--IOS Feature Sets as Network Solutions |
| Summary of Cisco IOS Engineering Efforts |
| Cisco IOS Release Models |
| Benefits of Cisco IOS Software |
| Summary |
| 2 An Overview of the Evolution of Cisco IOS Release Models |
| The Cisco IOS Software Release Models |
| The Early Days of Cisco IOS Software: The Classic Release Model |
| Next Generation of Release Process (NGRP) |
| Overview of the Current Cisco IOS Release Model: The Technology Release Process |
| The Highlights of the Technology Release Process |
| Early Deployment Releases During the Technology Release Process |
| Importance of Unifying the Releases |
| 3 Characteristics of Cisco IOS: Definitions, Naming Convention, Versioning, Numbering, and Feature Packaging |
| The Influence of Cisco's Business Unit Structure |
| Categories of Cisco IOS Releases |
| Cisco IOS Main Releases |
| Early Deployment Releases |
| Cisco IOS Release Naming Conventions |
| Letter Definitions for Major ED Releases |
| Multiple Letter Definitions for STED and XED Releases |
| Cisco IOS Maintenance and Interim Version Numbering Conventions |
| Cisco IOS Software Binary Image Naming Convention |
| The Platform Identifiers |
| System Board Identifiers |
| IOS Feature Set Content |
| Cisco IOS Software Run-Time Memory Space |
| Cisco IOS Software Image File Type Extensions |
| How to Identify an IOS Release from a Running Router |
| Release Type Definitions and Examples |
| Example of Show Version Banner Output |
| Cisco IOS Software Product Numbering System |
| Cisco IOS Software Life Cycle Milestones |
| Cisco IOS Software and the Millennium Considerations |
| Source of Cisco Router's Calendar |
| Cisco Routers with Battery Backed-up Clock |
| Cisco Routers Without Battery Backed-up Clock |
| Cisco IOS and Application Software |
| Cisco Router Chip Sets |
| Some Important Dates for Verifying Y2K Compliance |
| Cisco Y2K Summary--The Bottom Line |
| II specification of cisco ios releases |
| 4 Early Cisco IOS Software Releases: The Classic Phase of the Cisco IOS Release Process |
| The Singular Major Release Model |
| How Features and Hardware Platform Drivers Were Integrated into IOS during the Classic Phase |
| Cisco IOS Version 9 |
| x |
| Cisco IOS Version 10 |
| x |
| Cisco IOS Version 11 |
| 0 |
| Cisco IOS Early Deployment Releases Based on 11 |
| 0 |
| Cisco IOS Version 11 |
| 0NA |
| Cisco IOS Version 11 |
| 0BT |
| Cisco IOS Version 11 |
| 1 |
| Early Deployment Releases Based on IOS 11 |
| 1 |
| Cisco IOS Version 11 |
| 1AA |
| Cisco IOS Version 11 |
| 1CA |
| Cisco IOS Version 11 |
| 1CC |
| Cisco IOS Version 11 |
| 1CT |
| Cisco IOS Version 11 |
| 1IA |
| 5 Cisco IOS Releases During the NGRP Phase |
| Necessity of a Another Cisco IOS Release Process |
| Description of the NGRP Release Process |
| Cisco IOS 11 |
| 2 Main Release |
| Cisco IOS 11 |
| 2P (Platform Specific Major Release) |
| Cisco IOS 11 |
| 2F Release (Feature Specific Major Release) |
| Cisco IOS Early Deployment Software Based on 11 |
| 2 Releases |
| Cisco IOS 11 |
| 2BC |
| Cisco IOS 11 |
| 2GS |
| Cisco IOS 11 |
| 2SA |
| Cisco IOS 11 |
| 2WA3 |
| Cisco IOS 11 |
| 2(4)XA |
| Cisco IOS 11 |
| 2(9)XA |
| 6 Cisco IOS Releases 11 |
| 3/11 |
| 3T and Related STED: The Beginning of the Technology Release Model |
| The Plan for Deploying 11 |
| 3 and 11 |
| 3T |
| The Transitional Nature of 11 |
| 3/11 |
| 3T |
| Cisco IOS 11 |
| 3 Main Release |
| Cisco IOS 11 |
| 3T Consolidated Technology Release |
| Specific Technology Early Deployment Release Based on 11 |
| 3 Major Releases |
| Cisco IOS 11 |
| 3AA |
| Cisco IOS 11 |
| 3DA |
| Cisco IOS 11 |
| 3DB |
| Cisco IOS 11 |
| 3HA |
| Cisco IOS 11 |
| 3MA |
| Cisco IOS 11 |
| 3NA |
| Cisco IOS 11 |
| 3(x)WA4(x) |
| Cisco IOS Release 11 |
| 3(2)XA |
| 7 Current Cisco IOS Releases: Extension of the Technology Model |
| Unification of the Releases, IOS Version 12 |
| 0/12 |
| 0T |
| Importance of IOS 12 |
