Get List of Available IP for Subnet

Azure CLI recently added this command:

az network vnet list-available-ips -g [resource group] -n [vnet name]

This works great but only seems to return some ip addresses in the VNet.

Can we leverage the jmeshquery --query to specify some ip range or a subnet to narrow this down?

Is your feature request related to a problem? Please describe. Yes, the list-available-ips command doesnt return all available ip’s

For example you may have 192.168.0.0/16 and you may have a bunch of subnets, can we filter to a given subnet, or get all available ip’s from the vnet.

Describe the solution you’d like Option 1 - Possibly use --query to specify the ip range of the subnet or subnet name

Option 2 - Add the same list-available-ips command for az network vnet subnet

If there is a way to do this, maybe we can document it and update the CLI Docs with an example.

Describe alternatives you’ve considered Manually typing random ip’s in a range to see if they are consumed.

Additional context We did this for VNet level but that only returns some of the available ip’s.

[thiDucTran]

we are using this as a workaround

#!/usr/bin/bash

vnet_rg=""
vnet_name=""
subnet_name=""
netmask="24"

max_ip=$((2 ** (32-$netmask)-5))

used_ip=`az network vnet subnet show -g $vnet_rg -n $subnet_name --vnet-name $vnet_name -o json | jq  ".ipConfigurations[].id" | wc -l`

available_ip=$(($max_ip - $used_ip))

echo "There are $available_ip IPs available"

[necusjz]

Testing blocked by feature Microsoft.Network/AllowMultipleAddressPrefixesOnSubnet registration.