(2 votes, average: 4.5 out of 5)
Loading ...Thu 24 Jul 2008
In this tutorial, you will learn how to build a Cisco switching lab … even though GNS3 cannot emulate a Cisco switch. I will show you how to use an NM-16ESW network module in a 3640 router to emulate a switching environment.
(10 votes, average: 3.7 out of 5) Loading ...Mon 7 Jul 2008
If you have used GNS3 for any amount of time at all, you have encountered this situation. It’s late and you have been working on your lastest lab for hours. You decide to save your work. Logically, you go to File > Save. Unfortunately, the topology is saved but the router configs are gone.
(16 votes, average: 4.25 out of 5) Loading ...Wed 14 May 2008
One of the major hurdles many people face with GNS3/Dynagen/Dynamips is that the emulators do not come with the Cisco Images to actually build a lab. It seems like once a week, I get an email with a request for an IOS Image, Pix Image, Pix Serial Numbers or Pix Activation codes. Just so I make myself clear, I will not give this information to you. Period. However…
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(18 votes, average: 4.5 out of 5) Loading ...Sun 6 Apr 2008
In this tutorial, you will learn how to build a small frame-relay lab. I will walk you through adding the routers, the frame switch, configuring the PVCs on the switch, and configuring the routers for basic point-to-point connectivity.
(8 votes, average: 5 out of 5) Loading ...Sat 8 Mar 2008
In Part 2 of the GRE/IPSec tutorial series, you will learn how to encrypt the GRE tunnels you built in Part 1. Although I only show you how to create a hub and spoke topology, it is also possible to create a fully meshed topology or even a partial mesh. I highly recommend creating GRE tunnels from the branch to every datacenter in your organization.
(9 votes, average: 4.67 out of 5) Loading ...Wed 5 Mar 2008
I first discovered GRE with IPSec about 4 years ago when a customer needed to transmit IPX and multicast traffic over his VPN. Since then, I have primarly used GRE/IPSEC tunnels for transmitting internal routing protocols over the internet. RIP, EIGRP or OSPF can be used over a GRE tunnel just as though it were a point to point circuit. It is also very useful for multicast music on hold.
(21 votes, average: 4.05 out of 5) Loading ...Mon 28 Jan 2008
This tutorial will demonstrate how to install GNS3 Router Emulation Software on a Linux platform. I used Ubuntu 7.10 because I use it as my home OS and the most user friendly.
(32 votes, average: 4.19 out of 5) Loading ...Wed 16 Jan 2008
This tutorial will help you build a basic Internet lab using GNS3 as a WAN simulator. It will be referenced by future tutorials such as how to configure GRE/IPSec VPNs, how to configure a DMVPN (Dynamic Multipoint VPN) and QOS.
(17 votes, average: 4.47 out of 5) Loading ...Fri 11 Jan 2008
In a previous tutorial, I showed you how to use a windows loopback interface to connect to your dynagen/dynamips lab.
This tutorial is the same (in theory). Only this time we are using gns3 instead of dynagen. Before running the gns3 loopback tutorial, you may want to go through the microsoft loopback tutorial first.
(26 votes, average: 4.23 out of 5) Loading ...Fri 28 Dec 2007
When using GNS3, the application used for console access is normally basic telnet. Personally, I do not like the windows telnet application at all. It does not allow logging or the ability to maximize the window.
This tutorial will show you how to use Putty for console access instead of the default
