nanog mailing list archives
Re: Common operational misconceptions
From: Paul Graydon <paul () paulgraydon co uk>
Date: Thu, 16 Feb 2012 20:50:11 -1000
On 2/16/2012 8:30 PM, Carsten Bormann 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.On Feb 16, 2012, at 18:08, Jack Bates wrote:It at first started with trying to explain that vlan based switching is not Layer-3. :(Ah, one of the greatest misconceptions still around in 2012: -- OSI Layer numbers mean something. or -- Somewhere in the sky, there is an exact definition of what is layer 2, layer 3, layer 4, layer 5 (!), layer 7 or -- my definition is righter than yours
Paul
Current thread:
- Re: Common operational misconceptions, (continued)
- Re: Common operational misconceptions Mark Andrews (Feb 16)
- Re: Common operational misconceptions Owen DeLong (Feb 15)
- Re: Common operational misconceptions Paul Thornton (Feb 16)
- Re: Common operational misconceptions Jared Mauch (Feb 16)
- Re: Common operational misconceptions Owen DeLong (Feb 16)
- Re: Common operational misconceptions Ray Soucy (Feb 16)
- Re: Common operational misconceptions Jeff Kell (Feb 16)
- Re: Common operational misconceptions Chuck Anderson (Feb 16)
- Re: Common operational misconceptions Jack Bates (Feb 16)
- Re: Common operational misconceptions Carsten Bormann (Feb 16)
- Re: Common operational misconceptions Paul Graydon (Feb 16)
- Re: Common operational misconceptions Carsten Bormann (Feb 16)
- Re: Common operational misconceptions -Hammer- (Feb 17)
- Re: Common operational misconceptions Jared Mauch (Feb 17)
- Re: Common operational misconceptions -Hammer- (Feb 17)
- Re: Common operational misconceptions Charles Mills (Feb 17)
- Re: Common operational misconceptions John Kristoff (Feb 17)
- Re: Common operational misconceptions Jack Bates (Feb 17)
- Re: Common operational misconceptions Jack Bates (Feb 17)
- Re: Common operational misconceptions Leo Bicknell (Feb 17)
- RE: Common operational misconceptions Brandt, Ralph (Feb 17)