- Veeam Support Knowledge Base
- "Value cannot be null. Parameter name: dnsName” Error when performing Infrastructure scans in Veeam Backup for AWS
"Value cannot be null. Parameter name: dnsName” Error when performing Infrastructure scans in Veeam Backup for AWS
| KB ID: | 3147 |
| Product: | Veeam Plug-In for AWS |
| Version: | Any |
| Published: | 2020-04-16 |
| Last Modified: | 2024-07-23 |
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For more information about Veeam Plug-In for AWS considerations and limitations, please review:
Veeam Backup for AWS User Guide > Planning and Preparation > Considerations and Limitations
Challenge
When performing an infrastructure scan in Veeam Backup for AWS, you receive the following error:
“Failed to synchronize region 'regionname': Value cannot be null. Parameter name: dnsName”
"Value cannot be null. Parameter name: dnsName”
“Failed to synchronize region 'regionname': Value cannot be null. Parameter name: dnsName”
"Value cannot be null. Parameter name: dnsName”
Cause
Your AWS account supports only EC2-Classic instances. In Veeam Backup for AWS, you can protect only EC2 instances that run in a VPC.
Solution
Please migrate from EC2-Classic to a VPC.
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