Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

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

VPCS and VPCS multi-host

the most significant difference between Single instance VPCS and VPCS multi-host is possibly one you may never use, but incredibly powerful just the same. Continue reading

Posted in GNS3, GNS3 WorkBench, vpcs | Tagged , , , | 3 Comments

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

Best after sales support I’ve ever had. Thumbs up for Everki

So here is my backpack. I’ve cut the straps and destroyed it. It was the best backpack I’ve had in 20 years of lugging around a computer   So why did I cut the straps? To answer that, have a … Continue reading

Posted in GNS3 WorkBench

Pi day

Just a heads up for tomorrow. I’m sure you all realise that tomorrow is Pi day – because if you write the date tomorrow in the American format (3/14) you get the first three digits of Pi. But do you … Continue reading

Posted in GNS3 WorkBench

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

Posted in GNS3 WorkBench | Tagged | 2 Comments

GNS3 and IOU remote server install on Centos 6.5

GNS3 and IOU remote server install on Centos 6.5.

Posted in GNS3 WorkBench

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

Posted in GNS3 WorkBench | 2 Comments