Some basic info:
https://en.wikipedia.org/wiki/Intrusion_detection_system
I presume any additional prevention system may have some impact on networking to some degree as traffic has to be inspected, looked at, check and see if it's a thread or not based on a data base and other factors. All of this has to happen very fast.
D-Link will have more information regarding this. I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this.
Link> Tech Support Contact InformationWe find that phone contact has better immediate results over using email.
Let us know how it goes please.