You can check whether the client monitoring data is normal, or view various monitoring data of the domain name, such as access bandwidth, back-to-origin bandwidth, status codes, etc., through the "Statistical Analysis" directory on the left side of the CDN console. If there is a significant increase in non-2XX status codes for access and back-to-origin, it indicates that the service may be abnormal. To ensure that the live environment is not affected, it is recommended to switch the domain name resolution back to the origin server, find the cause and fix it before switching the CNAME to Tencent Cloud.
