I use the free basic version of http://www.gliffy.com for mock-ups. It doesn't go as deep as OmniGraffle or Visio, but it's enough to illustrate concepts to NOC guys or executives.
- Network diagram software Mathias Wolkert
- Re: Network diagram software Colin Alston
- Re: Network diagram software William Warren
- Re: Network diagram software Malte von dem Hagen
- Re: Network diagram software Chris Meidinger
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- Re: Network diagram software Amit Kaushal
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- Re: Network diagram software Craig Holland
- Re: Network diagram software Malte von dem Hagen
- Re: Network diagram software Michael Hallgren
- Re: Network diagram soft... Michael Hallgren
- Re: Network diagram software Bill Woodcock
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- Re: Network diagram software Brian Feeny
- Re: Network diagram software Joe Provo