larger cover

Add To My Wish List

Register your product to gain access to bonus material or receive a coupon.

Inside Cisco IOS Software Architecture (CCIE Professional Development)

Book

  • Sorry, this book is no longer in print.
Not for Sale

Foundation learning for CCIE exams

  • About
  • Description
  • Sample Content
  • Updates

Features

  • Copyright 2000
  • Edition: 1st
  • Book
  • ISBN-10: 1-57870-181-3
  • ISBN-13: 978-1-57870-181-0

An essential guide to understanding the Cisco IOS architecture

In-depth coverage of Cisco's IOS Software architecture provides crucial information to:

  • Prevent network problems and optimize performance through more efficient design and configuration
  • Isolate and resolve network problems more quickly and easily
  • Apply the appropriate packet switching method, such as process switching, fast switching, optimum switching, or Cisco Express Forwarding (CEF)
  • Understand the hardware architecture, packet buffering, and packet switching processes for shared memory routers (Cisco 1600, 2500, 3600, 4000, 4500, and 4700 series)
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco 7200 series routers
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco 7500 series routers
  • Understand the hardware architecture, packet buffering, and packet switching processes for the Cisco GSR 12000 series routers
  • Further your knowledge of how IOS Software implements Quality of Service (QoS)

Inside Cisco IOS Software Architecture offers crucial and hard-to-find information on Cisco's Internetwork Operating System (IOS) Software. IOS Software provides the means by which networking professionals configure and manage Cisco networking devices. Beyond understanding the Cisco IOS command set, comprehending what happens inside Cisco routers will help you as a network designer or engineer to perform your job more effectively. By understanding the internal operations of IOS Software, you will be able to take architectural considerations into account when designing networks and isolate problems more easily when troubleshooting networks. Inside Cisco IOS Software Architecture provides essential information on the internal aspects of IOS Software at this level, and it is an invaluable resource for better understanding the intricacies of IOS Software and how it affects your network.

Inide Cisco IOS Software Architecture begins with an overview of operating system concepts and the IOS Software infrastructure, including processes, memory management, CPU scheduling, packet buffers, and device drivers, as well as a discussion of packet switching architecture with detailed coverage of the various platform-independent switching methods, including process switching, fast switching, optimum switching, and Cisco Express Forwarding (CEF). The book then delves into the intricate details of the design and operation of platform-specific features, including the 1600, 2500, 4x00, 3600, 7200, 7500, and GSR Cisco routers. Finally, an overview of IOS Quality of Service (QoS) is provided, including descriptions of several QoS methods, such as priority queuing, custom queuing, weighted fair queuing, and modified deficit round robin.

Online Sample Chapter

Early Cbus Routers

Table of Contents



1. Fundamental IOS Software Architecture 2

Operating Systems Basics. CPU Resource Management and Multitasking. Memory Resource Management. Interrupts. IOS Architecture Overview. Memory Organization. Memory Pools. IOS Processes. Process Life Cycle. IOS Process Priorities. Process Examples. IOS Kernel. The Scheduler. The Memory Manager. Packet Buffer Management. System Buffers. Device Drivers. Summary.



2. Packet Switching Architecture.

Routing 101: Process Switching. Traffic Load Sharing with Process Switching. Disadvantages of Process Switching. Fast Switching: Caching to the Rescue. Fast Cache Organization. Maintaining the Cache. Traffic Load Sharing Considerations with Fast Switching. Optimum Switching. Cisco Express Forwarding. How CEF Works. Traffic Load Sharing with CEF. Summary.



3.Shared Memory Routers.

Hardware Architecture for Shared Memory Routers. CPU. Memory. Interface Controllers. Packet Buffers for Shared Memory Routers. Private Buffer Pools. Receive Rings and Transmit Rings. Packet Switching on a Shared Memory Router. Receiving the Packet. Switching the Packet. Transmitting the Packet. Summary.



4. Early Cbus Routers.

AGS+ Hardware Architecture. Packet Switching with the Cbus. Autonomous Switching. Cbus Fast Packet Memory. The Cisco 7000 Series Router. Summary.



5. Particle-Based Systems.

Buffer Management Using Particles. Particle Pools. Particle Coalescing. The Cisco 7200 Series Routers. Hardware Architecture. Memory. Packet Switching on the Cisco 7200 Series Routers. Packet Receive Stage. Packet Switching Stage. Packet Transmit Stage. Summary.



6. Cisco 7500 Routers.

Hardware Architecture of the Cisco 7500 Router. The Data Bus. Route Switch Processor. Packet Switching on the Cisco 7500 Router. RSP Switching: Receiving the Packet. RSP Switching: Switching the Packet. RSP Switching: Transmitting the Packet. VIP Architecture. VIP Components. VIP Models. VIP Packet Operations: Distributed Switching. VIP Receive Side Buffering. Troubleshooting Tips for the Cisco 7500 Router. High CPU Utilization. Input Drops. Ignores. Output Drops. Summary.



7. The Cisco Gigabit Switch Router: 12000.

Hardware Architecture. Switching Fabric. Maintenance Bus. Gigabit Route Processor. Line Card. Packet Switching. Packet Switching: Engine 0 and Engine 1. Packet Switching: Engine 2 LC. Packet Switching: Switching Cells across Fabric. Packet Switching: Transmitting Packets. Summary.



8. Quality of Service.

QoS Overview. Congestion Management. Congestion Avoidance. Priority Queuing. Configuring and Monitoring Priority Queuing. Custom Queuing. Weighted Fair Queuing. Platform-Independent WFQ. Configuring and Monitoring WFQ. Distributed Weighted Fair Queuing. Modified Deficit Round Robin. Configuration of MDRR. Weighted Random Early Detection. Configuration and Monitoring of WRED. Selective Packet Discard. Other QoS Features. Summary.



9. NetFlow Switching 200.

Flow Cache Maintenance. Flow Export. Router-Based Flow Aggregation Export (RBA).



Index.

Cisco Press Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from Cisco Press and its family of brands. I can unsubscribe at any time.

Overview

Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Cisco Press products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites; develop new products and services; conduct educational research; and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@ciscopress.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security

Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children

This site is not directed to children under the age of 13.

Marketing

Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out

Users can always make an informed choice as to whether they should proceed with certain services offered by Cisco Press. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.ciscopress.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links

This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020