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
Troubleshooting

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

## Message that you need to install Discovery Agent


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.


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.


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


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.


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.


Retry adding fewer servers.