Know your gear
The Cisco 2800 Series Module (AIM-VPN/SSL-2) can provide hardware-based IPSec encryption services of 30 and 160Mbps in the Cisco 2801, 35 and 130Mbps in the Cisco 2811, 90 and 140Mbps in the Cisco 2821, and 100 and 160Mbps in the Cisco 2851 (IPSec IMIX and 1400-byte packets).