Cannot ssh to the Unibo test VM after reboot

Good afternoon!

I tried to reboot the Unibo Test VM after a kernel upgrade, but now I can't ping it or ssh to it, either from the outside or from the other VM (production). Do you know if there is a way for us to access to a management console/RDP/IPMI-like service to be able to understand why the VM won't reboot?

Thanks.