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articles/virtual-network-manager/concept-ip-address-management.md

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# What is IP address management (IPAM) in Azure Virtual Network Manager?
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In this article, you learn about the IP address management (IPAM) feature in Azure Virtual Network Manager and how it can help you manage IP addresses in your virtual networks. With Azure Virtual Network Manager's IP Address Management (IPAM), you can create pools for IP address planning, automatically assign non-overlapping classless inter-domain routing (CIDR) addresses to Azure resources, and prevent address space conflicts across on-premises and multi-cloud environments.
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In this article, you learn about the IP address management (IPAM) feature in Azure Virtual Network Manager and how it can help you manage IP addresses in your virtual networks. With Azure Virtual Network Manager's IP Address Management (IPAM), you can create pools for IP address planning, automatically assign nonoverlapping classless inter-domain routing (CIDR) addresses to Azure resources, and prevent address space conflicts across on-premises and multicloud environments.
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[!INCLUDE [virtual-network-manager-ipam](../../includes/virtual-network-manager-ipam.md)]
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## What is IP address management (IPAM)?
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In Azure Virtual Network Manager, IP address management (IPAM) helps you centrally manage IP addresses in your virtual networks through the use of IP address pools. The following are some key features of IPAM in Azure Virtual Network Manager:
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In Azure Virtual Network Manager, IP address management (IPAM) helps you centrally manage IP addresses in your virtual networks by using IP address pools. The following are some key features of IPAM in Azure Virtual Network Manager:
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- Create pools for IP address planning
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- Automatically assign non-overlapped CIDRs to Azure resources
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- Automatically assign nonoverlapped CIDRs to Azure resources
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- Reserve IPs for specific demands
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- Prevent Azure address space from overlapping on-premises/multi-cloud environments.
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- Prevent Azure address space from overlapping on-premises and multicloud environments.
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- Monitor IP/CIDR usages and allocations in a pool
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### Allocating IP addresses to Azure resources
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When it comes to allocation, you can assign Azure resources with CIDRs, such as virtual networks, to a specific pool. This helps in identifying which CIDRs are currently in use1. There is also the option to allocate static CIDRs to a pool, useful for occupying CIDRs that are either not currently in use within Azure or are part of Azure resources not yet supported by the IPAM service1. Allocated CIDRs are released back to the pool if the associated resource is removed or deleted, ensuring efficient utilization and management of the IP space1.
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When it comes to allocation, you can assign Azure resources with CIDRs, such as virtual networks, to a specific pool. This helps in identifying which CIDRs are currently in use1. There's also the option to allocate static CIDRs to a pool, useful for occupying CIDRs that are either not currently in use within Azure or are part of Azure resources not yet supported by the IPAM service1. Allocated CIDRs are released back to the pool if the associated resource is removed or deleted, ensuring efficient utilization and management of the IP space1.
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### Delegating permissions for IP address management
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With IPAM, you can delegate permission to other users to utilize the IPAM pools, ensuring controlled access and management while democratizing pool allocation. These permissions will allow users to see the pools they have access to, aiding in choosing the right pool for their needs.
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With IPAM, you can delegate permission to other users to utilize the IPAM pools, ensuring controlled access and management while democratizing pool allocation. These permissions allow users to see the pools they have access to, aiding in choosing the right pool for their needs.
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Delegating permissions also extends to allowing others to view usage statistics and lists of resources associated with the pool. Within your network manager, complete usage statistics are available, showing the total number of IPs, the number of used IPs, the percentage of used IPs, and the percentage of allocated pool space. Additionally, it shows details for pools and resources associated with pools, giving a complete overview of the IP usages and aiding in better resource management and planning.
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Delegating permissions also allows others to view usage statistics and lists of resources associated with the pool. Within your network manager, complete usage statistics are available including:
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- the total number of IPs in pool
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- the number of used IPs
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- the percentage of used IPs
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- the percentage of allocated pool space.
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Additionally, it shows details for pools and resources associated with pools, giving a complete overview of the IP usages and aiding in better resource management and planning.
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### Simplifying resource creation
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When creating CIDR-supporting resources like virtual networks, CIDRs are automatically allocated from the selected pool, simplifying the resource creation process1. The system ensures that the automatically allocated CIDRs do not overlap within the pool, maintaining network integrity and preventing conflicts1.
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When creating CIDR-supporting resources like virtual networks, CIDRs are automatically allocated from the selected pool, simplifying the resource creation process1. The system ensures that the automatically allocated CIDRs don't overlap within the pool, maintaining network integrity and preventing conflicts1.
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## Permission requirements for IPAM in Azure Virtual Network Manager
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You need to have the Network Contributor role for the scope of the network manager instance you want to create and manage.
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## Next steps
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> [!div class="nextstepaction"]
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> [!div class="nextstepaction"]
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> [Learn how to managed IP addresses in Azure Virtual Network Manager](./how-to-manage-ip-addresses.md)

articles/virtual-network-manager/how-to-ip-address-management.md

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