Tag Archives: Cisco

Cisco have a new ACI lab on dcould – here’s how to access it

If you sell/buy/use Cisco products, and you want to practice configuring them, then Cisco’s dcloud is a great resource.  And they have just added another ACI lab: Cisco Application Centric Infrastructure with shared Physical Fabric. If you already know about dcloud, … Continue reading

Posted in Cisco, Cloud, Cloud computing, Data Center, Data Centre | Tagged , , , , , , | 4 Comments

VPCS Tutorial-updated

Many people are not aware of how to make the best use of the features the the Virtual PC Simulators (VPCS) application, so I thought I’d run a tutorial. This is re-work of the original tutorial I wrote, updated for … Continue reading

Posted in Cisco, GNS3, GNS3 WorkBench, tutorial, vpcs | Tagged , , , , | 10 Comments

GNS3 WorkBench v8.7 is ready for download

It has taken a while, but I’ve finally got all the files for GNS3 WorkBench v8.7 uploaded to sourceforge. And the Windows version (and OS X version) is better than ever. You can now enjoy all the exercises and labs … Continue reading

Posted in Cisco, dynamips, GNS3, GNS3 WorkBench, Labs, Router Configuration | Tagged , , , , , , , , | 11 Comments

ICND1 Readiness Test

Recently I had a student (let’s call him David) ask me “Do you think I am ready to sit the ICND1 exam?” Although David had studied the ICND1 text book, his skills were lacking when it came to configuring routers.  … Continue reading

Posted in Cisco, dynamips, GNS3, GNS3 WorkBench | Tagged , , , , , , , , , , , , | 14 Comments

Building a new GNS3 WorkBench lab

Building a new GNS3 WorkBench lab [Note: The procedures described in this post are dependant on the reader having a copy of GNS3 WorkBench Virtual Machine v8.7 or later] GNS3 WorkBench comes with lots of labs, but building a new … Continue reading

Posted in Cisco, dynamips, GNS3, GNS3 WorkBench | Tagged , , , , , , | 3 Comments

Why configuring NTP demands patience

I noticed that my router’s clock was about half an hour off, so I decided to configure NTP. However, it proved much more frustrating that I though, due mainly to my impatience. In this article I hope to explain to … Continue reading

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Q&A on GNS3 WorkBench v8.6

I got some great questions from Rob Methven so I thought I’d answer them here in the form of a “Q&A”. Q. I got the Etherswitches and VPCs pinging each other no problem. However, when I do a show mac-address … Continue reading

Posted in dynamips, GNS3, GNS3 WorkBench | Tagged , , , , , | 11 Comments

Is EIGRP a Hybrid Routing Protocol or Advanced Distance Vector Routing Protocol?

Is EIGRP a Hybrid Routing Protocol or Advanced Distance Vector Routing Protocol? This question was discussed recently on the Cisco CCIE Routing and Switching Study Group website.  It took me years to work out that the problem with this question … Continue reading

Posted in CCNA, Cisco, EIGRP, ICND, ICND1, ICND2, OSPF, RIP, RIP, Routing | Tagged , | Comments Off on Is EIGRP a Hybrid Routing Protocol or Advanced Distance Vector Routing Protocol?

VIRL and GNS3. One day all routers will be virtual

Preamble If you don’t know what VIRL (Virtual Internet Routing Lab) is, read this. If you don’t know what GNS3 is, read this.  The question is, “What impact will the imminent release of VIRL have on GNS3?” Discussion This is … Continue reading

Posted in Cisco, Cloud, Data Center, Data Centre, dynamips, GNS3, GNS3 WorkBench, Virtual Machine | Tagged , , , , , , , , , , , , , | Comments Off on VIRL and GNS3. One day all routers will be virtual

Is GNS3 going commercial? Surely Not!

I was firstly delighted, then dismayed by an email that appeared in my inbox this morning. It read: Hey GNS3, We are completely rebuilding GNS3 and want your help! In 2013, we are going to be building a brand new … Continue reading

Posted in CCNA, Cisco, GNS3, Labs, opinion, rant, Wireshark | Tagged , , , , , , , | 8 Comments