If you need to configure the Security level and firewall of your Red Hat system and you only has a SSH access to the system, use bellow command as a privileged user.
system-config-securitylevel-tui
level
Host CPU incompatible issue when migrating virtual machines between ESX hosts
I was trying to migrate a virtual machine from one ESX host to another and received following validation error, “Host CPU is incompatible with the virtual machine’s requirements at CPUID level 0x1 register ‘ecx’.”.
Host CPU Incompatibility
The solution to this issue is to enable Enhanced vMotion Capability (EVC) in your virtual cluster. Please follow following article on how to enable EVC.