Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

Professional IT Instructor. All things TCP/IP, Cisco or VoIP

Open What?

I was ask by some students to describe the difference between the “Open” standards associated with SDn (Software Defined Networking) So I did this little presentation for them OpenWhat

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GNS3 and IOU remote server install on Centos 6.5

GNS3 and IOU remote server install on Centos 6.5.

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Subnetting without tears

Forget the bitwise operations. Here’s how I do subnets.  In my head!  Any subnet, any mask in 30 seconds or less. 1.    First – credit where it is due.  My method has been shamelessly stolen from Wendell Odom’s CCENT/CCNA … Continue reading

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Using GNS3 WorkBench labs on real equipment

This request came up the other day: I just need some guided labs that I can do at home with my equipment. So I thought about how you could use GNS3 WorkBench exercises to do just that. Here is what … Continue reading

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

Quick check to see if VPCS is working

If you are having trouble getting the Virtual PC Simulator (VPCS) to talk to your GNS3 (dyanamips) routers, then you might want to try this quick check to verify that VPCS itself is functioning correctly and that there are no … Continue reading

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HOW TO install GNS3 v1.0 beta on Ubuntu/Linux Mint/Debian

I wrote a script to keep my Linux Mint 17.0 GNS3 v1.0 beta install updated. [Edit: The script has been updated to download the latest release version, rather than the beta version] This script has been tested on 32 bit … Continue reading

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WordPress Changed their editor – and it sucks

Welcome to the keyhole. Trying to edit/create a blog post using WordPress just got harder (as if it wasn’t hard enough already!) When I go to create a page, the first thing you notice is that you have to edit … Continue reading

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