Haitham,
By tunnel capacity I mean the number of simultaneous
tunnels that can be supported on a given platform. And
connection rate refers to the ability for the platform
to connect/disconnect Phase 1 connections per second.
So the metrics would be Total Tunnels for tunnel
capacity, and connections per second for connection
rate. 

Connection rate is a metric for IKE, while tunnel
capacity is not necessarily so. This is because we can
create tunnels without using IKE (manual). I am using
Smartbits with TeraVPN for measuring tunnel capacity.

I have figured out how to measure connection rate with
help from VPN vendors. They say that the quoted
connection rate is a metric of DH and RSA computation
performance. Specifically, 2*DH (generation,
agreement) and 2*RSA (sign, verify) operations. I
found a utility called crypto++ to measure the time it
took for each of the operations to get a connection
rate. I get pretty low number compared to what can be
done with hardware accelerators.

Regards

--- Haitham Genedy <[EMAIL PROTECTED]> wrote:
> Hello Kun
>     Can i ask you some questions please
> What are the physical meaninigs of both tunnel
> capacity and connection rate
> and what are their units?
> Are these metrics are dedicated to IKE?
> How could you measure the tunnel capacity?
> 
> Thank you
> 
> BR
> Haitham Genedy
> ----- Original Message ----- 
> From: "Kun Lee" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, July 24, 2003 7:00 PM
> Subject: [Users] Measuring VPN Performance
> 
> 
> > I have the task of measuring VPN performance for a
> set
> > of VPN gateways. The main metrics I'm interested
> in
> > are throughput, tunnel capacity, and connection
> rate.
> > Throughput and capacity are easy to measure with
> the
> > tools I'm using already (Smartbits). Any idea on
> how
> > to measure connection rate? For various VPN
> hardware,
> > I'm seeing reported numbers of eg. 1000 IKE Phase
> 1
> > Connections per second. How are they getting these
> > numbers? Does anyone know of any tools that can
> help
> > me with this?
> > 
> > Thanks in advance
> > 
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> 


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