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What Dan and Gregory said.
But assuming an unloaded gateway, with "normal" hardware (Any Intel, AMD or PowerPC processor from the last 10 years or a recent ARM), then even if you use relatively secure parameters (2048-bit DH group, 2048-bit RSA keys) the round trip time is going to dominate. The calculations themselves take less than 20 milliseconds.
So phase 1 should take about 3 round trips.
On Nov 18, 2009, at 8:31 AM, <firstname.lastname@example.org> <email@example.com> wrote:
> Greetings. Is there any data out there that quantifies how long a typical IKEv1 session (main mode and/or aggressive mode) take to complete?