Re: [vnrg] Some definitions and way forward

Joe Touch <touch@isi.edu> Thu, 04 August 2011 18:00 UTC

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Date: Thu, 04 Aug 2011 11:00:18 -0700
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Subject: Re: [vnrg] Some definitions and way forward
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Hi, all,

AFAICT:

a tunnel is a way to virtualize a network path at one level (the 
substrate - physical or itself virtual) as a single hop at the virtual level

tunnels may be pt-pt or multipoint; L3 tunnels emulate L2 subnets in a sense

However, a VPN is something different; it's a network that is not 
accessible except via an additional tunnel. The core of a VPN need not 
be virtualized; only the link to a single user or to another VPN is virtual.

That's my view of the difference.

Joe (as an individual contributor)