AWS Migration Hub is no longer open to new customers as of November 7, 2025. For capabilities similar to AWS Migration Hub, explore [AWS Transform](https://aws.amazon.com/transform).

# Troubleshooting the AWS Migration Hub network diagram
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Use the information here to help you troubleshoot and fix issues that you might encounter when working with the network diagram in AWS Migration Hub.

**Topics**
+ [Message that you need to install Discovery Agent](#troubleshooting-problem-need-agent)
+ [Problems when adding servers or expanding diagram](#troubleshooting-problem-expand-diagram)

## Message that you need to install Discovery Agent
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The following topics describe scenarios when you get a message that you need to install Discovery Agent.

### After choosing one or more servers on the server list page, and then choosing **Visualize network**, you get a message that you need to install a discovery agent on the server.
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Add AWS Application Discovery Service Discovery Agent to the servers that you that want mapped in the network diagram. For more information, see [Setting up Agent Based Discovery](https://docs.aws.amazon.com/application-discovery/latest/userguide/setting-up-agents.html) the *Application Discovery Service User Guide*. 

### When trying add a server that doesn't have discovery agent installed to a group, you get a message that you need to install discovery agent on the server.
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Add the Discovery Agent to the servers that you that want to be able to add to a group.

## Problems when adding servers or expanding diagram
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The following topics describe scenarios when you get a message when adding new servers or expanding existing servers.

### When adding new servers or expanding existing servers on the network diagram, you get a message that your choices will cause the diagram to exceed its visual limit of 1,500 server nodes.
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Retry adding fewer servers.

### When adding new servers or expanding existing servers on the network diagram, you experience high latency that leads to a time out.
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Retry adding fewer servers.