You can create multiple subnets from an existing network that resides on subnet boundaries and currently has no subnets configured.
To allocate subranges:
- On the Networks tab of the IPAM page, select the network you want to allocate from in the list.
- Use either the Action or the ellipses in the row to select Allocate subranges.
- In the dialog, configure the new subranges.
- Size: Select a subnet mask for how large the subranges should be.
- Count: Select the number of subranges you want to allocate.
- Starting at: If you select fewer subranges than fit within the network, you can set the offset from where to start the allocation.
- When you’re finished configuring, select Next.
- Define the title and custom properties for the new subranges. Then, select Next.
- In the Summary step, verify the new subranges and select Finish.