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f 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
Monthly Archives: October 2014
Configure TACACS+ on Junos devices
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
TACACS+ on Ubuntu 14.04 LTS
In this post I will be describing the steps required to install TACACS+ on Ubuntu 14.04 LTS. I will be compiling the TACACS+ daemon with ACL support for additional security.
I will also run through the basic configuration of Cisco devices to use TACACS+ for Authentication, Authorisation and Accounting. Continue reading TACACS+ on Ubuntu 14.04 LTS
GNS3 v1.1 install on Ubuntu 14.04 LTS
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
Ubuntu DHCP Server
In this post I will be describing setting up Ubuntu 14.04 LTS as a DHCP server.
The steps in this guide have been tested on a clean install of Ubuntu 14.04 LTS server, but should be applicable to most Debian based distributions (Linux Mint etc). Continue reading Ubuntu DHCP Server
Fundamentals: DHCP
Every device that wants to communicate on a network requires an IP address, subnet mask, default gateway and DNS server details. There are two methods to configure an IP address information on a Host:
- Statically (manually), this is typically reserved for mission critical servers and network devices (routers and switches).
- Dynamically, this is typically used for hosts that do not care if their IP changes periodically.
GNS3 and IOU remote server install on Centos 6.5
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
Connect GNS3 to the Internet
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