Hi, If you have a Cisco 2501 or similar instead Cisco 2600 you can use Ipsec with this HW requirements.The Cisco 2600 has a high requirements of HW always more than the 2500.I have running IPSec with 4 Mb of SDRAM and 8M of Flash memory on the 2500.I...
You can run IPSec on the 2501 plataform,but it depends on what type of encription you need to use and what type and quantity of traffic you need to encript.I have running IPSec on the 2500 plataform.