What is them max VPN sessions simultaneously?

I use a Cisco CBS 350 and having issues with Poe, some ports get bounced from time to time. Do 

I am trying to use the Integrity Verification Applicationin APIC-EM (1.6.4.30024) to verify ISR 4331's platform integrity but facing the unknown boot0 measurement issue. I initially tried with bootloader version  16.7(5r) and software version 16.06.0...

Any issues on reservations?

Controller is not reachable, is it normal or takes some time than usual to come up?