GNS3NetworkSimulationGuide

From installation through to creating large scale simulations, this is the complete guide to GNS3 that will give you the know-how needed for Cisco certification. For networking professionals, it’s a career-advancing tutorial.OverviewDevelop your knowledge for Cisco certification (CCNA, CCNP, CCIGnS 3 Network Simulation GuideCopyright o 2013 Packt PublishingAll rights reserved. No part of this book may be reproduced, stored in a retrievalsystem, or transmitted in any form or by any means, without the prior writtenpermission of the publisher, except in the case of brief quotations embedded incritical articles or reviewsrt has been made in the preparation of this book to ensure the accuracyof the information presented However the information contained in this bookis sold without warranty either express or implied. Neither the author nor packtPublishing and its dealers and distributors will be held liable for any damagescaused or alleged to be caused directly or indirectly by this bookPackt Publishing has endeavored to provide trademark information about all of thecompanies and products mentioned in this book by the appropriate use of capitalsHowever, Packt Publishing cannot guarantee the accuracy of this informationFirst published: October 2013Production reference: 1211013Published by Packt Publishing ltdLivery place35 Livery streetBirmingham b3 2PB UKISBN978-1-78216-080-9www.packtpub.comCover Image by Chris Welsh(rednectar. chrisogmail. com)CreditsAuthorProject CoordinatorsRedNectar" Chris WelshRomal KaraniEsha thakkerReviewersAnthony BurkeProofreaderJohn herbertLucy rowlandAcquisition EditorIndexerWilson d'souzaTejal R. SoniCommissioning EditorProduction coordinatorsMelwyn D'saAlwin RoyTechnical editorsMonica johCover WorkNikhil potdukheMelwyn D'saFaisal SiddiquiAbout the author"RedNectar"Chris Welsh likes to share knowledge, so it's no surprise that hespends most of his time teaching, some of his time consulting and too much of histime on forums and blogs. The teaching is mainly Cisco related (he became a CCsI in1998), the consulting is through his own company(Nectar Network Knowledge)andhisblog(http://rednectar.net),alongwithhiscontributionstotheGns3Forum(http://forum.gns3.net),becametheinspirationtowritethisbookTokeephissanity, he likes to go for long walks in bushland, particularly around the NationaParks near his hometown of Sydney, australiaAbout the reviewersAnthony burke is an Enterprise Network architect in the australian emergencyservices sector. He has experience across many technology and business verticalsanthony is very passionate and driven in seeking out technology trends andabstracting the business application. I Ie has more than 5 years of experience in theindustry, is currently Cisco and Juniper certified and is undertaking the path toCCiE and eventually CCDEAnthony contributes back to the community by blogging at blog. ciscoinfernonet and various other platforms. Anthony can be found on twitter as apandomI would like to thank my loving wife Katrina. You rock! I thank youfor indulging me and listening to me when I start rambling about thebenefits of OSPF versus eigrP or why the industry hasnt shifted toIPv6 vet!John Herbert, CCIE@#6727(Routing and Switching)has been moving packetsaround networks for over 15 years, and has been doing so as a consultant since1999.Inhissparetimeheblogsathttp://lamejournal.comandcanbefoundonTwitter as @mrtugs John lives in Atlanta, Georgia with his wife and three children,and has a home network that is arguably the very definition of overkillWww.Packtpub.comSupport files, eBooks, discount offersand moreYoumightwanttovisitwww.PacktPub.comforsupportfilesanddownloadsrelatedtoyour bookDid you know that packt offers e Book versions of every book published, with pdF and ePubfilesavailable?YoucanupgradetotheeBookversionatwww.Packtpub.comandasaprintbook customer, you are entitled to a discount on the e book copy. 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Simply use your login credentials forimmediate accessTable of contentsPrefaceChapter 1: Clearing the First Hurdle7Pre-installation tasks and prerequisitesUnderstanding the GnS3 family of applicationsMemory and CPRouter image files8899Downloading GNS3The installation process11Installing on WindowsInstalling on OS X (Macintosh)12Installing on Linux Mint13Post-installation tasksThe setup wizard15Summary19Chapter 2: Creating your First GNS3 Simulation21Jumping in the deep end -a basic two-router configuration22Conceptualizing a project28The topology. net file28The configs directory29The working directory29Opening a project29Getting to know the GUI30Tips for managing your workspace31Tips for managing your routers32Using vPcs (virtual PC Simulator)32Capturing packets with Wireshark37Avoiding the 100 percent CPu utilization problem39Coming to grips with Idle-PC values40Table of contentsIntroducing GNS3 generic switches42Ethernet switch42Frame-relay and atm switches45Summary46Chapter 3: Enhancing GNS347Connecting to physical interfaces48Mini-project -connecting your GnS3 router to your LAN48Why cant my host computer ping my router?51The Microsoft Loopback adapter52The Linux Nio TAP adapter52The Os X TUN/TAP adapter55Adding VLAN support59Generic Ethernet switch59EtherSwitch router60Terminal tips61Using a different terminal application62Using the aux port63Troubleshooting a device console63Fine-tuning the topology -adding graphics and text64Accessing GNS3 running on a remote machine64Accessing a device console remotel65Linking GNS3 topologies on different hosts66Summary66Chapter 4: Unleashing Other Emulators67The qemu emulator68Adding Qemu support68InuXQemu preferencesMicrocore Linux using Qemu70Adding asa firewallsAdding Juniper routers(Junos78The virtualBox emulator84Adding virtual Box support84A Windows Pc on oracle virtualBox85A Linux PC on virtualBox89Adding a Vyatta router using VirtualBox89Summary95Chapter 5: The Cisco Connection97Cisco routers -emulated hardware97Cisco lOS99Platform100Table of ContentsFeature setMemory location and compression format10Train number101Maintenance release101Train identifierRAM requirements and the feature navigator102Summary103Chapter 6: Peeking under the GNS3 Hood105Understanding the topology. net file105Say hello to the hypervisor107The gns 3 orchestra110UDP tunnel concept112Conducting Qemu and virtualBox115Debugging using the GNS3 management console117Summary118Chapter 7: Tips for Teachers, Troubleshooters,and team leaders119Packaging your projects120Adding instructions120Managing snapshots121Using remote hypervisors121Remote hypervisor tutorial12Preparing the remote servers122Preparing the host computerLoad balancing across multiple hypervisors126Using your local GNS3 host as a hypervisorBuilding the topolo126Choosing the right platform127Using VPCS with remote hypervisors127Running GNS3 in a virtual machine128The gns3 Work Bench solution129GNS3 Limitations131Ethernet interfaces are always up131Cisco router support132Host pc communication in a virtual machine environment132Getting more help132Official Websites for all the gns3 suite of programs132Other helpful online resources133Summary34Index135