cpu needed to NAT 45mbs
jeff-kell at utc.edu
Thu Nov 8 20:38:09 UTC 2007
Darden, Patrick S. wrote:
> From my experience, a fast P4 linux box with 2 good NICs can NAT
> 45Mbps easily. I am NAT/PATing >4,000 desktops with extensive access
> control lists and no speed issues. This isn't over a 45Mb T3--this
> is over 100 Mb Ethernet.
NAT processing requirement thresholds are all about *flows* per second, not *bytes* per second. Once you have a cached flow, it's trivial. The overhead of statefully tracking flows, setup, teardown, timeouts, housecleaning, etc., are the limiting factors.
If you want to stress-test it, you should benchmark it with SQL Slammer :-)
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