vc6.7直接7.0--直接使用7.0安装包升级便可
7.0之后修补升级，需要下载patch包
https://my.vmware.com/zh/group/vmware/patch#search
https://my.vmware.com/web/vmware/downloads
通过存储库或者cd/rom升级
https://docs.vmware.com/cn/VMware-vSphere/7.0/com.vmware.vcenter.upgrade.doc/GUID-043EF6BD-78F7-412F-837F-CBDF844F850C.html