Hi ,
Its support both IPS module and cisco IOS IPS , but IOS module has got limited function
Look into below link for more information
http://www.cisco.com/c/en/us/products/collateral/routers/1841-integrated-services-router-isr/prod_qas0900aecd806c4e3c.html
What are the differences between the Cisco IPS modules and Cisco IOS IPS?
A. Following are some of the major differences between the Cisco IPS AIM and IPS NME and Cisco IOS IPS:
• Cisco IPS AIM and IPS NME have dedicated CPU and DRAM to offload IPS processing, whereas Cisco IOS IPS shares router resources with other processes.
• Cisco IPS AIM and IPS NME support both inline and promiscuous mode, whereas Cisco IOS IPS supports only inline mode.
• Cisco IPS AIM and IPS NME can support all Cisco IPS signatures that are not retired by default, whereas Cisco IOS IPS can support only a user configurable subset.
• Cisco IPS AIM and IPS NME run Linux-based Cisco IPS Sensor Software, whereas Cisco IOS IPS runs a Cisco IOS Software-based IPS code.
HTH
Sandy
