Run diagnose npu np6lite status and watch hardware process 98% of your traffic. No CPU spikes. Ever.
Skip 6.0.16 (had a critical memory leak in the ipsengine daemon). Skip 6.0.18 if you don't need specific bug fixes—it was a limited-scope release for critical vulnerabilities only and introduced minor VPN instability for some users. for the 200D. fortigate 200d latest firmware extra quality