Need to have a IDS/IPS system for LAN Users

[littlespace]

Hi,

I need to have a IDS/IPS for my local users in my network. we have 3xcisco 6509 in access layer switch with 4 VLANS and I am looking for a system to detect activities like Port scan, IP scan and ,... in local network from the workstations.

Please advise me.

Thanks,

Mike