What Restrictions Apply to ECSs?
- You are advised not to upgrade ECS kernel or OS versions. If you want to upgrade the main OS version, for example, from CentOS 7.2 to Cent OS 7.3, use the provided OS changing function.
- You are advised not to uninstall the performance optimization software pre-installed on your ECSs.
- You are advised not to change the MAC addresses of your ECS NICs.