1 Building Scalable Cisco Networks Introduction Overview Building Scalable Cisco Networks (BSCN) is an instructor-led course presented by Cisco Systems, Inc. training partners to their end-user customers. This five- day course focuses on using Cisco routers connected in local area networks (LANs) and wide area networks (WANs) typically found at medium to large network sites. Upon completion of this training course, you will be able to select and implement the appropriate Cisco IOS services required to build a scalable routed network. This chapter highlights the course prerequisites and course highlights as well as some administrative issues. It includes the following topics: ■ Course Objectives ■ Course Topics ■ Prerequisites ■ Participant Role ■ General Administration ■ Sources of Information ■ Course Syllabus ■ Graphic Symbols 1-2 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. Course Objectives This section lists the course objectives. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-2 Course Objectives Course Objectives Upon completion of this course, you will be able to perform the following tasks: • Given a network specification that calls for simplifying IP address management at branch offices by centralizing addresses, select and configure the appropriate services • Given a network specification calling for a scalable routed network that includes link state protocols and redistribution, implement the appropriate technologies Upon completion of this course, you will be able to perform the following high- level tasks: ■ Select and configure a scalable IP address solution (including route summarization) for a branch office environment, given a list of specifications ■ Select and implement the technologies necessary to redistribute between and to support multiple, advanced, IP routing protocols, given a network specification Copyright  1999, Cisco Systems, Inc. Introduction 1-3 © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-3 Course Objectives (cont.) Course Objectives (cont.) • Given a network specification calling for either a single or a multi-homed interconnection into an ISP’s BGP network, configure the edge routers to properly interconnect into the BGP cloud • Given a network specification calling for controlling access to networks or devices, or for minimizing overhead traffic, select and configure the appropriate access list features ■ Configure and test edge router connectivity (either single or multi-homed connection) into a BGP network, given a network specification ■ Configure access lists, given a need to control access to devices and to selectively reduce overhead traffic in the network 1-4 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-4 Course Objectives (cont.) Course Objectives (cont.) • Given various network specifications calling for multiple routed and routing protocols, implement case studies that reflect a scalable internetwork ■ Implement the results of case study discussions in a laboratory environment, given a specification containing multiple routed and routing protocols Copyright  1999, Cisco Systems, Inc. Introduction 1-5 Course Topics This section lists the topics that will be covered in this course. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-5 Legend FastEthernet/ Ethernet Primary Secondary Course Topics Course Topics BGP AS #2 BGP AS #1 The figure shows a high-level overview of a network that you should be able to build at the end of this class. To accomplish this course goal, you will be taught how to configure Cisco routers with Ethernet LAN and serial WAN interfaces. You will configure the following on a Cisco device: ■ Transmission Control Protocol/Internet Protocol (TCP/IP) and Internet Protocol (IP) addresses ■ Hierarchical addressing using variable length subnet masking (VLSM) and route summarization ■ Routing protocols: Enhanced Internet Gateway Routing Protocol (EIGRP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP) ■ Redistribution between different routing protocols ■ Access lists to control IP traffic and routing updates ■ Serial WAN connections over interfaces that use High-Level Data Link Control (HDLC) and Point-to-Point Protocol (PPP) ■ Serial WAN connections over subinterfaces that use Frame Relay encapsulation Configuration, verification, and troubleshooting are done with Cisco IOS software. 1-6 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. Prerequisites This section lists the course’s prerequisites. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-6 • Understanding distance vector routing protocol operation and configuring RIP and IGRP • Determining when to use static and default routes and enabling them on a Cisco router • Working knowledge of the OSI reference model and the hierarchical model • Understanding of internetworking fundamentals Building Scalable Cisco Networks (BSCN) • Operating and configuring a Cisco IOS device • Working knowledge of the TCP/IP stack and how to configure a routed protocol, such as IP Prerequisites Prerequisites To fully benefit from BSCN, you should already possess certain prerequisite skills. The skills are presented in the following figures. These skills can be gained from self-paced/instructor-led training sessions and from work experience. These prerequisites are highlighted in the figures and are outlined on the following pages. The participant should have a working knowledge of: ■ Commonly used networking terms, numbering schemes, and topologies ■ The Open System Interconnection (OSI) reference model ■ Operation and configuration of a Cisco router ■ TCP/IP stack and configuration of IP addresses ■ Distance-vector routing protocol (RIP, IGRP) operation and configuration ■ Static and default route usage, implementation, and configuration Copyright  1999, Cisco Systems, Inc. Introduction 1-7 © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-7 • Verifying router configurations with available tools like show and debug commands • Displaying and interpreting a Cisco routing table • Enabling an IP standard and extended access list Building Scalable Cisco Networks (BSCN) • Enabling a WAN serial connection • Configuring Frame Relay PVCs on interfaces and subinterfaces Prerequisites Prerequisites The participant should also have a working knowledge of: ■ Contents and interpretation of a Cisco routing table ■ Traffic filtering with standard and extended access lists ■ Verifying router configuration using show and debug command output ■ WAN serial interface configuration using HDLC ■ WAN serial interface configuration using Frame Relay PVCs 1-8 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-8 Building Scalable Cisco Networks (BSCN) Prerequisites Prerequisites Successful completion of: • Internetworking Technologies Multimedia (ITM) • Plus One of the following combinations: • Introduction to Cisco Router Configuration (ICRC) and Cisco LAN Switch Configuration (CLSC) • Cisco Router and LAN Switches (CRLS) • Interconnecting Cisco Network Devices (ICND) The participant should already possess certain knowledge and skills gained in a structured learning environment. These skills can be gained from completing the Internetworking Technology Multimedia (ITM) CD-ROM plus a combination of instructor-led training sessions. These courses are highlighted in the figure and are outlined below: ■ Introduction to Cisco Router Configuration (ICRC) contains router configuration basics and Cisco LAN Switch Configuration (CLSC) contains LAN switch configuration basics ■ Cisco Router and LAN Switches (CRLS) contains router and LAN switch configuration basics ■ Interconnecting Cisco Network Devices (ICND) contains router and LAN switch configuration basics Copyright  1999, Cisco Systems, Inc. Introduction 1-9 Participant Role This section discusses your responsibilities as a student. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-9 Student role • Meet prerequisites • Introduce yourself • Ask/answer questions Participant Role Participant Role To take full advantage of the information presented in this course, you should meet the prerequisites for this class. Introduce yourself to the instructor and other students who will be working with you during the five days of this course. You are encouraged to ask any questions relevant to the course materials. If you have pertinent questions concerning other Cisco features and products not covered in this course, please bring these topics up during breaks or after class and the instructor will try to answer the questions or direct you to an appropriate information source. 1-10 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. © 1999, Cisco Systems, Inc. www.cisco.com BSCN—1-10 Welcome: Please Introduce Yourself Welcome: Please Introduce Yourself • Your name and work location • Your job responsibilities • Your internetworking experience • Your objectives for this week Introduce yourself, stating your name and the job function you perform at your work location. Briefly describe what exposure you have with installing and configuring Cisco routers, attending Cisco classes, and how your work experience helped you meet the prerequisites highlighted earlier. You should also state what you expect to learn from this course. [...]... Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Answers to Exercise © 1999, Cisco Systems, Inc www .cisco. com 1-15 Answers to Exercise Copyright © 1999, Cisco Systems, Inc Overview of Scalable Internetworks 2-15 Written Exercise: Overview of Scalable Internetworks Network Problem Key Requirement Connectivity restrictions Accessible but secure Cisco IOS Feature(s) Efficient s Scalable. .. how Cisco supports security, and how to make Note your network secure using Cisco products, refer to the “Managing Cisco Network Security” course 2-12 Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Summary • Scalable internetworks must be reliable, responsive, efficient, adaptable, and accessible • Routers can be specialized based on their location in the internetwork • Cisco. .. maintains a network topology map Routers also forward network changes quickly to all routers in the network topology Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Making the Network Responsive Use routing protocols that • Use alternate paths • Load balance • Use dial backup over WANs © 1999, Cisco Systems, Inc www .cisco. com BSCN—2-7 Making the Network Responsive s Scalable protocols... requirements of a scalable internetwork • Select a Cisco IOS feature as a solution for a given internetwork requirement © 1999, Cisco Systems, Inc www .cisco. com BSCN—2-2 Objectives This chapter defines scalable internetworks and discusses some of the Cisco IOS features that can be used to meet the needs of these networks Topics include: s s Scaling Large Internetworks s Characterizing Scalable Internetworks... s Written Exercise: Overview of Scalable Internetworks s 2-2 Objectives Answers to Exercise Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Scaling Large Internetworks WAN Backbone Core Campus Backbone Distribution Access Branch Office © 1999, Cisco Systems, Inc www .cisco. com BSCN—2-3 Scaling Large Internetworks Today’s internetworks need to be scalable because they are experiencing... Cisco Documentation CD-ROM or www .cisco. com s ITM CD-ROM or www .cisco. com s Cisco IOS 12.0 Configuration Guide and Command Reference Guide All of these documents can all be found at the following URL: http://www .cisco. com 1-12 Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Course Syllabus This section discusses the week’s schedule Course Syllabus Module 1 Module 2 Building Scalable. .. networks that are using different routing protocols Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Making the Network Accessible but Secure Dialup PSTN Dedicated Packet Switched Frame Relay Network should support the necessary connection types © 1999, Cisco Systems, Inc www .cisco. com BSCN—2-11 Making the Network Accessible but Secure The network should be accessible, particularly at... provide connectivity without compromising network integrity For example, the routers at the access point must be able to detect whether a telecommuter dialing in is legitimate, with minimal authentication steps required by the telecommuter Building Scalable Cisco Networks Copyright © 1999, Cisco Systems, Inc Characterizing Scalable Internetworks Scalable internetworks need to be: • • • • • Reliable... mechanisms Integrate networks using legacy protocols 2-16 Building Scalable Cisco Networks Adaptable Copyright © 1999, Cisco Systems, Inc 3 Routing Principles Overview This chapter covers concepts related to logical Internet Protocol (IP) network addresses and the usage of network masks to make routing decisions The mechanisms by which Cisco routers learn and maintain knowledge of the network topology... connectivity in business and at home What do scalable networks look like? What are the requirements that you, as an administrator, must be aware of when managing the growth of your scalable internetwork? Scalable internetworks are typically described as networks that are experiencing constant growth They must be flexible and expandable The best-managed scalable internetworks are typically designed following . PVCs 1-8 Building Scalable Cisco Networks Copyright  1999, Cisco Systems, Inc. © 1999, Cisco Systems, Inc. www .cisco. com BSCN—1-8 Building Scalable Cisco Networks (BSCN) Prerequisites Prerequisites Successful. 1 Building Scalable Cisco Networks Introduction Overview Building Scalable Cisco Networks (BSCN) is an instructor-led course presented by Cisco Systems,