In vSphere 5.1 and later, you can prevent and recover from network misconfiguration by using rollback, backup configuration files or previous configurations.

vSphere 5.1 and later can rollback to previous valid networking configuration if a misconfiguration of the management network occurs. To recover from misconfiguration, you can connect directly to a host to fix any networking issues through the DCUI. Rollback is available for use on both standard and distributed switches.