Public/Get-MerakiDeviceApplianceDHCPSubnets.ps1

function Get-MerakiDeviceApplianceDHCPSubnets {
    <#
    .SYNOPSIS
        Gets the DHCP subnets configured on a specific Cisco Meraki appliance by serial number.
    .DESCRIPTION
        This function makes a REST API call to the Meraki dashboard API to retrieve information about the DHCP subnets configured on a specific Cisco Meraki appliance, based on its serial number. The function returns detailed information about each subnet, including its VLAN ID, subnet mask, gateway, and DNS servers.
    .PARAMETER AuthToken
        The authentication token to use for the API call. This should be a valid API key for the Meraki dashboard.
    .PARAMETER deviceSerial
        The serial number of the Cisco Meraki appliance to retrieve DHCP subnet information for.
    .EXAMPLE
        PS C:\> Get-MerakiDeviceApplianceDHCPSubnets -AuthToken "myapikey" -deviceSerial "Q2XX-XXXX-XXXX"
        Returns information about the DHCP subnets configured on the Cisco Meraki appliance with the specified serial number.
    #>

    [CmdletBinding()]
    param (
        [parameter(Mandatory=$true)]
        [string]$AuthToken,
        [parameter(Mandatory=$true)]
        [string]$DeviceSerial
    )
    try {
        $header = @{
            "X-Cisco-Meraki-API-Key" = $AuthToken
        }
        $response = Invoke-RestMethod -Method Get -Uri "https://api.meraki.com/api/v1/devices/$DeviceSerial/appliance/dhcp/subnets" -Header $header -UserAgent "MerakiPowerShellModule/1.0.2 DocNougat"
        return $response
    }
    catch {
        Write-Error "Failed to retrieve Meraki appliance DHCP subnet information: $_"
    }
}