Verify network connectivity to DNS servers. 2. Ensure DNS servers are online and responding to name resolution requests. ...

1. Verify network connectivity to DNS servers. 
2. Ensure DNS servers are online and responding to name resolution requests.
3. Verify DNS server settings.
Note: Operations status is updated in accordance with the configured refresh interval. Clicking Refresh to manually update status does not update the status of the DNS resolution and ICMP reachability checks.