nanog mailing list archives
RE: Common operational misconceptions
From: "Kenneth M. Chipps Ph.D." <chipps () chipps com>
Date: Fri, 17 Feb 2012 12:43:24 -0600
Exactly right. They have some much information floating around in their heads many of them cannot fit it together. But once they get on the job, all of those little synapses rapidly connect, and then the light comes on. Higher education is just like drivers education. You did not learn to drive in drivers education. You learned how to drive by driving. Higher education gives you the foundation on which to learn. -----Original Message----- From: Paul Graydon [mailto:paul () paulgraydon co uk] Sent: Friday, February 17, 2012 12:33 PM To: nanog () nanog org Subject: Re: Common operational misconceptions On 02/17/2012 04:29 AM, Leo Bicknell wrote:
In a message written on Thu, Feb 16, 2012 at 08:50:11PM -1000, Paul
Graydon wrote:
At the same time, it's shocking how many network people I come across with no real grasp of even what OSI means by each layer, even if it's only in theory. Just having a grasp of that makes all the world of difference when it comes to troubleshooting. Start at layer 1 and work upwards (unless you're able to make appropriate intuitive leaps.) Is it physically connected? Are the link lights flashing? Can traffic route to it, etc. etc.I wouldn't call it a "misconception", but I want to echo Paul's comment. I would venture over 90% of the engineers I work with have no idea how to troubleshoot properly. Thinking back to my own education, I don't recall anyone in highschool or college attempting to teach troubleshooting skills. Most classes teach you how to build things, not deal with them when they are broken.
The Cisco CCNA syllabus used to emphasise the layer 1->7 approach to troubleshooting. Not sure if they still do, or if trainers even bother to mention it (mine did back when I did it several years ago)
The basic skills are probably obvious to someone who might design course material if they sat down and thought about how to teach troubleshooting. However, there is one area that may not be obvious. There's also a group management problem. Many times troubleshooting is done with multiple folks on the phone (say, customer, ISP and vendor). Not only do you have to know how to troubleshoot, but how to get everyone on the same page so every possible cause isn't tested 3 times.
Never trust what you can't prove yourself, that includes vendors and customers. Every now and then I forget this and find hours later that I've wasted a whole bunch of time because I trusted when someone said something that it actually was the case. It's really often better to test something a third time even if Vendor and Customer tell you something is a particular way.
I think all college level courses should include a "break/fix" exercise/module after learning how to build something, and much of that should be done in a group enviornment.
Definitely. I've learnt more in my time from breaking things than I've ever learnt setting them up; however the education system is focused on breadth of knowledge, not depth. Students are expected to be able to regurgitate ridiculous amounts of facts and figures, so that they pass standardised tests, not understand how to actually use them. Paul
Current thread:
- Re: Common operational misconceptions, (continued)
- Re: Common operational misconceptions Owen DeLong (Feb 17)
- Re: Common operational misconceptions Cutler James R (Feb 17)
- Re: Common operational misconceptions Ray Soucy (Feb 17)
- Re: Common operational misconceptions Todd Snyder (Feb 17)
- Re: Common operational misconceptions -Hammer- (Feb 17)
- Re: Common operational misconceptions Ray Soucy (Feb 17)
- Re: Common operational misconceptions -Hammer- (Feb 17)
- RE: Common operational misconceptions Mario Eirea (Feb 17)
- RE: Common operational misconceptions George Bonser (Feb 17)
- Re: Common operational misconceptions Paul Graydon (Feb 17)
- RE: Common operational misconceptions Kenneth M. Chipps Ph.D. (Feb 17)
- Re: Common operational misconceptions Paul Graydon (Feb 17)
- Re: Common operational misconceptions Michael Painter (Feb 18)
- Re: Common operational misconceptions Paul Graydon (Feb 18)
- RE: Common operational misconceptions George Bonser (Feb 18)
- Re: Common operational misconceptions Michael Painter (Feb 18)
- National Initiative for Cybersecurity Education (NICE) Sean Donelan (Feb 18)
- Re: Common operational misconceptions Lamar Owen (Feb 17)
- Re: Common operational misconceptions Michael Sinatra (Feb 16)
- Re: Common operational misconceptions Justin M. Streiner (Feb 18)
- Re: Common operational misconceptions Jared Mauch (Feb 16)