I have a 20Mbit/sec leased line with no limit on burst download. When I test download speeds, I can see that it is limited to 25Mbit/sec. I moved them onto our old PIX to test it, and the bandwidth seems to reach 50Mbit/sec with it. This is a huge difference.
All other equipment is equal when I run the tests. Same server, same switch port. The only change is the gateway is switched from the ASA to the pix. What would cause this? The interface port on both is set to 100Mb/full, as is the next device that they connect to in the data centre.
CPU on the ASA stays around 8-9% during my tests.
I do have IPS enabled on the ASA, could this be the cause?