GNS3-Topology: EvilRouters-Weighting To Influence BGP Routing

This is an older lab that is part of the BGP series labs that Jeremy over at EvilRouters.net is building. The labs are great and they will surely serve someone some great lab experience by the time hes done with them all.

This lab picks up from:

• EvilRouters.net – Configuring Basic BGP
• GNS3-Topology: EvilRouters- BGP Over Multilink PPP Lab

Don’t get too confused – yes the topology has dramatically changed

In Jeremy’s next lab he will use the local preference attribute to influence INBOUND BGP Routing

Read More »

Beginning-Saving and Exporting GNS3 Labs Including Router Configs & Screenshots

REPOST

We have all experienced a time when working in GNS3 and we _think_ we saved the the topology and router configurations. So you open GNS3 and load that config, start them routers, watch them boot all the way to the painful prompt

Would you like to enter the initial configuration dialog? [yes/no]:

And your hard work is GONE!

Read More »

GNS3-Topology: EvilRouters- BGP Over Multilink PPP Lab

BGP for me is one hell of an interesting routing protocol. Until I got into working with enterprise networks, I never realized how much it was used. After working with it now for about 2 years, it’s really grown on me and is a part of the CCNP study which I cant wait to make it to. Even more so I cant wait to implement as many as I can Anyway onto the lab…

As a continuation from Jeremy‘s Configuring Multilink PPP lab over at EvilRouters, and my GNS3 verison of it: EvilRouters-Multilnk PPP Lab – Here is part 2 of his series – This one is BGP Over Multilink PPP Lab

Read More »

GNS3-Labs on FaceBook – Join The Group

Hey everyone! Join the GNS3-Labs group on FaceBook

Also join the NetworkedBlogs App on FaceBook

Read More »

GNS3-Topology: EvilRouters – Multilink-PPP Lab

My buddy Jeremy over at EvilRouters does a great job at taking you through his labs. He includes great details and steps to getting the configurations and challenge completed. He also speaks in very simple terms which shows he cares about people understanding more than he likes hearing himself talk technical.

The lab below is a lab taken from a series of labs (which I will be posting) This is the initial lab “EvilRouters-Multilnk PPP Lab”

Read More »

GNS3 Announcement: GNS3 v0.6 Officially Released!

The long anticipated GNS3 v0.6 has been officially released. This version is not so different then the unofficial 0.6 I released some time ago. Minor differences are the bug corrected from them to today. Unfortunately they did not make it to the virtual pc simulation – but Jeremy speculates something about being able to do it in Dynamips.

I would guess that unless you are compiling sources in Linux, you will have to wait for mirrors to be updated.

1 nice improvement which should eliminate a lot of problems is the “New Project” prompt that pops-up in front of you the moment you open the program. It gives you the option to create a new project with some important options or open a project. This is an important feature and should be used anytime you begin working on a lab so that you don’t lose any configurations.

Below is a changelog – sort of ..

Read More »

Deadwait Delivers DynatazGNS3 – A new GNS3 on a Live CD

Deadwait or at In da Wok has come through again with new versions of his most famous GNS3 Live CDs. This time it comes in an even smaller package – just 35MB!

As Deadwait explains

New Gns3 live cd , based of on slitaz, size 35mb, user gns and no password , or user root with passwd root

Read More »

WordPressMobile Plugin – Visit GNS3-Labs From Your Mobile Device

While there may not be much benefit from actually making use of the site from your mobile device, its still nice to be able to look at it in an acceptable format to see new posts, comments, etc.

I was looking around for some sort of plugin because I’m always trying to respond to comments and questions while on the road. But the FULL blown website in a Windows Mobile PDA – just isn’t sexy

Commenting seems to be the only annoyance due to the fact that I don’t see a way to remain logged in and comment. You have to fill in your name, email and website if you would like to comment in several posts – not a deal breaker though.

You can take a look at it just by visiting the site within your Mobile PDA (blackberry, iphone, etc) and the plugin should detect a mobile device and reformat the view passed to your phone. It would be great if some of you confirm working and not working devices

Hope someone finds it useful!

Read More »

GNS3-Topology: CCNA & CCNP Full Mesh Topology Template

Chris sent me a lab which he says has helped him to work on about 95% of his CCNA and CCNP lab requirements. I think this is a clear sign that using Dynamips or GNS3 can be effective in a big way with exam preperation. That 5% left over can be achieved in a few ways – rack space, friends with labs or purchasing switches on ebay and link them into the virtual topology using real interfaces. Nevertheless Its great to see how much we can do without cash, space or budget (electricity bill) to prepare ourselves for these exams.

This lab is just a template lab and has no configs, routing protocols or scenarios to it. I’ll let Chris explain

Read More »

GNS3 Topology: BSCI – EIGRP & ISIS Redistribution Lab

On November 15th I posted a lab contributed:BSCI OSPF Excercise Sim Question From Jim Shank. The lab was a great excercise where Jim pitched a scenario and requirement and the solution. Great lab! Jim sent me a new lab to share which is even better and has often proven to be a challenge for many. The labs is based on EIGRP & ISIS Redistribution of routes. Great practice for the CCNP seeker!

Read More »

VLAN Database Lost When Restarting? – Saving VLAN.dat To NVRam

Came across a post online that I thought would help those who have been through the problem and upset of losing VLAN configurations once a router in GNS3 or Dynamips is reloaded. This post explains how to prevent this from happening.

ok, when you restart your Router or you turn off the GNS3, the VLAN configuration is missing, why? Because all the VLAN information is save to file vlan.dat. Yes, you know that already.

So, this is the step to save the configuration :

Read More »

GNS3 Topology: EvilRouters.Net – Basic IPSec VPN Over Frame-Relay Lab

Jeremy (AKA Jlgaddis) over at EvilRouters.net created 2 cool labs. 1 was a basic frame-relay lab and the other was adding IPSec VPN to the lab. He gave some great details and outlined the configuration – step by step. I compiled the lab for GNS3 specifically.

Jeremy has an awesome blog .. check him out @ EvilRouters

Routers Used: 3640

IOS: c3640-jk9s-mz.124-16a

Feature of Topology: Frame-Relay, IPSec, ISAKMP, VPN, EIGRP

Read More »

GNS3 Announcement: Want To Run An ASA? At Least Run The Code On PEMU

From the GNS3.net official site..

A new tool called “Cisco image unpacker” has been added on the download page. This tool which is simple to use, can unpack Cisco ASA and IOS images to be used with GNS3, Pemu or Qemu. Please note that at the moment only ASA v7 and early images are supported in GNS3 and Pemu. Read the provided README file to know how to use it.

Cisco binary image unpacker is a software that allows you to unpack IOS and ASA images.

Important notice: ASA v7 images can be used in GNS3 and Pemu. At the moment ASA v8 images run only with Qemu.

Read More

GNS3 Topology: Featuring – Virtual Area Links, Multi and Inter Area OSPF & Some Redistribution

Found a nice OSPF lab over at the GNS3.net forums, but it wasn’t properly exported and packaged. So I did what I always do .. Put it together, cleaned it up and tested and it works flawlessly. Very nice lab with virtual area links, RIP redistribution, inter-area and multi-area OSPF.

Routers Used: 3640

IOS: c3640-ik9o3s-mz.124-17a

Feature of Topology: Inter-Area and Multi-Area OSPF, Virtual Area Links, RIP Redistribution

Read More »

Video Tutorial: How to run Multi-PC topology using distributed hypervisors in GNS3

The guys over at BrainBump put together a great tutorial on using distributed hypervisors to improve the overall performance and increase the ability to run more routers in your labs.

Onto the video intro..

This tutorial will walk you through the process of settting up a distributed GNS3 topology where you can use different external hypervisor engines and run GNS3 topology in much easier and smoother fashion. This helps you utilize resources at hand in an efficient manner by distributing processor load across multiple hardware platforms. Most people use WindowsXP / Windows Vista on their laptop machines. However, for GNS3 and dynagen to perform at their peak, i would recommmend you to use a flavour of Linux which speeds up things to greater extent.

Read More »