Yes it is a separate purchase. Chat to your reseller for a RRP price. This software only runs on Unix (Solaris)
Part number is IDS-DIR. For more information see
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/csids/csids7/unix_cfg/index.htm
Alternatively use :
1. the IDS Manager and Event Viewer that come inbuilt in the 3.1 software.
2. CSPM2.3.3i-R (SEC-POL-MGR23R) restricted bundle for managing 3 IDS devices
3. Or use the VMS bundle that supports up to 10 devices (from memory). See http://www.cisco.com/warp/customer/cc/pd/sqsw/sqidsz/http://www.cisco.com/warp/public/cc/pd/wr2k/vpmnso/