Hello @Singh Vikram ,
Welcome to the MS Q&A platform.
As per your error message, the subnet that you are trying to use for your cluster does not have enough capacity for the number of IP addresses that you are trying to assign. Meaning your subnet is too small
To resolve this issue, you can try the following steps:
Check the available IP addresses in the subnet you are trying to use. If the subnet does not have enough IP addresses, then you can try increasing the size of the subnet by adding more IP addresses.
(or)
You can use a different subnet that has more available IP addresses. or you can create a new Vnet and then use that for your cluster.
Please refer to this document regarding deploying Azure databricks in Vnet : https://learn.microsoft.com/en-us/azure/databricks/administration-guide/cloud-configurations/azure/vnet-inject
I hope this helps. Please let me know if you have any further questions.