Author Archives: RedNectar Chris Welsh

About RedNectar Chris Welsh

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

Cisco UCS has had a baby (Mother and Daughterboard doing well)

Originally posted on UCSguru.com:
As many of you know I am now in full CCIE Datacenter study mode, and as such have not had as much time to blog and answer posted questions as I would like. However I…

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Posted in GNS3 WorkBench | Leave a comment

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

Posted in CCIE, Cisco, NTP | Tagged , , , | Leave a comment

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

GNS3 WorkBench v8.6 is finally out

Executive Overview The next version of GNS3 WorkBench is out.  You can download it several forms: An entire Virtual Machine as a single blob (although split into two files 2.5G-3G in size) The same Virtual Machine as individual files (in case … Continue reading

Posted in CCNA, Certifications, Cisco, dynamips, GNS3, GNS3 WorkBench, ICND1, ICND2, Labs, Mac OS X, Microsoft, Routing, Wireshark | Tagged , | 7 Comments

Using an iPad to improve Webex presentations – especially the Whiteboard

I had to do some Webex presentations recently – and I found the Webex interface clunky and dated – especially the annotation functions and the Whiteboard function.  Here is how I managed to at least spruce up the Whiteboard function … Continue reading

Posted in Webex | Tagged , , , , , , , , , , , | 4 Comments

What is 100Base-Tx and 1000Base-TX

I came across a question in the Cisco Learning Network which highlighted a source of confusion that many people have. Call me pedantic, but I thought I’d set the record straight – and let you know that when people refer … Continue reading

Posted in 1000BASE-T, 1000BASE-TX, 100BASE-T, 100BASE-TX, 802.3, Ethernet, IEEE | 3 Comments

Big Data Defined

OK – I stole it. But it was too good not to share: Big data defined: Big data is like teenage sex: Everybody talks about it Nobody really knows how to do it Everyone thinks everybody else is doing it.. … Continue reading

Posted in big data, blog

FCoE versus FC Farce

Originally posted on The Data Center Overlords:
Updates 2/6/2014: @JohnKohler noticed that the UCS Manager screenshot used (see below) is from a UCS Emulator, not any system they used for testing. Evaluator Group promises answers to questions that both I…

Posted in Cisco, Data Center, Data Centre, UCS

How to add Instructions to GNS3

Have you clicked the new menu item - Help | Instructions on GNS3?  This article explains how to make use of this feature, as well as point out some pitfalls along the way.  Getting Started If you want a page of … Continue reading

Posted in GNS3, GNS3 WorkBench, wordpress | Tagged , , , , , | 1 Comment

GNS3 Network Simulation Guide

Finally – it’s published! I can now say I’m a “published author”.  Check out my new book, GNS3 Network Simulation Guide, at PACKT or Amazon. As the blurb says, it will help you… Acquire a comprehensive knowledge of the GNS3 graphical network … Continue reading

Posted in blog, CCNA, Certifications, Cisco, dynamips, GNS3, GNS3 WorkBench, ICND1, ICND2, idle-max, Idle-PC, idle-sleep, idlemax, idlepc, idlesleep, Labs, vpcs, wordpress | Tagged , , , , | 10 Comments