Well its a new year and that means New Year resolutions and that its time I get off my butt and finish my CCNA. I will be writing my ICND 2 exam at the end of January so expect quite a few
posts on the topics covered in the ICND 2.
The first of these topics is a review of how a switch forwards a frame through the network. This is one of the fundamental topics covered in the ICND 1 exam, however if you do not have a clear understanding of the logic then you will find the topics covered in the ICND 2 exam, and in everyday trouble shooting, very difficult to grasp. Continue reading CCNA ICND 2: How a switch forwards frames
I love using GNS3 when I am studying as I can integrate a Virtual Machine, running a TACACS+ server for example, however this does come at a cost of CPU and RAM utilization.
I don’t always need a full Linux VM running when all I want to do is ping or traceroute between two hosts on the network, this is where Virtual PC Simulator (VPCS) comes into play. VPCS is a lightweight PC simulator that has a basic set of network commands such as ping, traceroute and telnet. It does not consume the CPU and memory resources that adding another router or VM would use. VPCS can simulate up to 9 separate PC at a time. Continue reading Adding VPCS to GNS3 v1.1
A reader recently requested that I do a post on installing VirtualBox and integrating it into GNS3 on a Linux install, so here it is.
In this post I provide step-by-step installation details for VirtualBox 4.3.18 (the latest version available) as well as the installation of the vboxwrapper for integration into GNS3. Continue reading Install VirtualBox for use in GNS3
If you are studying for your CCNA SP exam, or work with IOS XR and would like to learn more about the way IOS XR works you can now install IOS XRv in VirtualBox and integrate it with GNS3 version 1.1. In the following post I will describe the steps of setting up VirtualBox and GNS3 version 1.1 to use IOS XRv on Ubuntu 14.0.4. Continue reading Cisco IOS XRv in GNS3 using VirtualBox
In this post I will be configuring a Juniper Junos device to authenticate off of a local TACACS+ server.
I will be using GNS3 version 1.1, an Ubuntu 14.0.4 server running Shrubbery Networks TACACS+ daemon and a Junos olive image running JUNOS 12.1R1.9. Continue reading Configure TACACS+ on Junos devices
In this post I will be running through the installation of the public release of GNS3 version 1.1 on a clean install of Ubuntu 14.04 LTS.
I am using the Ubuntu Gnome 14.04 LTS distribution, however I have also tested it on a clean install of the standard Ubuntu 14.04 LTS with unity Continue reading GNS3 v1.1 install on Ubuntu 14.04 LTS
I recently got a new laptop at work. It has one major downside, it only has 4GB of RAM which is soldered straight into the motherboard and therefore can not be upgraded. Also 500MB of the RAM is reserved for the GPU, so I only have about 3.5GB of useabe RAM. This is fine for running my day to day applications for work, but does not leave much wiggle room for running GNS3.
Luckily I work for a hosting company and we have quite a few servers lying around doing nothing. I managed to get hold of a decommisioned server with 2 quad core processors and 48GB of RAM, perfect to run a remote GNS3 server on. We mainly use Centos and since it is not an OS I am familiar with (I mainly use Ubuntu) I decided to give it a go and try something new. In this post I will run through the steps I went through to get GNS3 sevrer running on Centos as well as setting up the GNS3 GUI to connect to the remote server. Continue reading GNS3 and IOU remote server install on Centos 6.5
It is always useful to be able to connect your GNS3 labs to a real world network such as a physical Lab network of real Cisco devices, connected to you PC, or even to the Internet.
In this post I will provide step by step instructions to connect your GNS3 install to a physical network and to connect to the internet. Continue reading Connect GNS3 to the Internet
In this post I will be running through the installation of GNS3 beta on a clean install of Ubuntu 14.04 LTS.
I am using the Ubuntu Gnome 14.04 LTS distribution, however I have also tested it on a clean install of the standard Ubuntu 14.04 LTS with unity Continue reading GNS3 beta install on Ubuntu 14.04 LTS