Scripts/Vlan/update-cohesityvlan.ps1

function Update-CohesityVlan {
    <#
        .SYNOPSIS
        Updates the vlan.
        .DESCRIPTION
        The Update-CohesityVlan function is used to update vlan.
        .NOTES
        Published by Cohesity
        .LINK
        https://cohesity.github.io/cohesity-powershell-module/#/README
        .EXAMPLE
        Update-CohesityVlan -InterfaceGroupName intf_group1 -VlanId 18 -Subnet 1.18.4.0 -NetmaskBitsForSubnet 20 -Gateway 1.18.4.1
        .EXAMPLE
        Get-CohesityVlan -VlanId 11 | Update-CohesityVlan -InterfaceGroupName intf_group1 -Subnet 1.2.1.1
    #>

    [CmdletBinding(DefaultParameterSetName = "InterfaceGroupName", SupportsShouldProcess = $True, ConfirmImpact = "High")]
    Param(
        [Parameter(Mandatory = $true, ParameterSetName = 'InterfaceGroupName')]
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo')]
        [ValidateNotNullOrEmpty()]
        # Specifies the name of the Interface group.
        [string]$InterfaceGroupName,
        [Parameter(Mandatory = $true, ParameterSetName = 'VlanId')]
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo')]
        [ValidateNotNullOrEmpty()]
        # Specifies the Id of the Vlan.
        [int]$VlanId,
        [Parameter(Mandatory = $true, ParameterSetName = 'Subnet')]
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo')]
        [ValidateNotNullOrEmpty()]
        # Specifies the subnet.
        [string]$Subnet,
        [Parameter(Mandatory = $true, ParameterSetName = 'NetmaskBitsForSubnet')]
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo')]
        [ValidateNotNullOrEmpty()]
        # Specifies the netmask for subnet.
        [int]$NetmaskBitsForSubnet,
        [Parameter(Mandatory = $false, ParameterSetName = 'Gateway')]
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo')]
        # Specifies the gateway.
        $Gateway,
        [Parameter(Mandatory = $false, ParameterSetName = 'PipedVlanInfo', ValueFromPipeline = $True, DontShow = $True)]
        # Piped vlan info.
        $VlanInfo = $null
    )

    Begin {
    }

    Process {
        if ($PSCmdlet.ShouldProcess("Update vlan parameters")) {
            $vlanObject = $null
            if ($VlanInfo) {
                # Object sailing through the pipe
                $vlanObject = $VlanInfo
            }
            else {
                $interfaceGroupObject = Get-CohesityInterfaceGroup | Where-Object { $_.name -eq $InterfaceGroupName }
                if ($null -eq $interfaceGroupObject) {
                    Write-Output "Interface group name '$InterfaceGroupName' does not exists"
                    return
                }
                # Look into the documentation for constructing the ifaceGroupName attribute
                $virtualInterfaceGroupName = $interfaceGroupObject.name + "." + $VlanId
                $vlanObject = Get-CohesityVlan | Where-Object { $_.id -eq $VlanId -and $_.ifaceGroupName -eq $virtualInterfaceGroupName }
            }

            if ($null -eq $vlanObject) {
                Write-Output "VLAN id '$VlanId' with interface group name '$InterfaceGroupName' does not exists"
                return
            }
            $cohesityClusterURL = '/irisservices/api/v1/public/vlans/' + $vlanObject.id

            $payload = @{
                id             = $vlanObject.id
                gateway        = $vlanObject.gateway
                subnet         = @{
                    ip          = $vlanObject.subnet.ip
                    netmaskBits = $vlanObject.subnet.netmaskBits
                }
                ifaceGroupName = $vlanObject.ifaceGroupName
                ips            = $vlanObject.ips
                vlanName       = $vlanObject.vlanName
            }
            if ($Gateway) {
                $payload.gateway = $Gateway
            }
            if ($Subnet) {
                $payload.subnet.ip = $Subnet
            }
            if ($NetmaskBitsForSubnet) {
                $payload.subnet.netmaskBits = $NetmaskBitsForSubnet
            }
            # The UI does not set the vlan name while creating, subsequently while updating the vlan, the ifaceGroupName is considered as vlanName
            if ($null -eq $payload.vlanName) {
                $payload.vlanName = $vlanObject.ifaceGroupName
            }
            $payloadJson = $payload | ConvertTo-Json -Depth 100
            $resp = Invoke-RestApi -Method Put -Uri $cohesityClusterURL -Body $payloadJson
            if ($resp) {
                $resp
            }
            else {
                $errorMsg = "VLAN : Failed to update"
                Write-Output $errorMsg
                CSLog -Message $errorMsg
            }
        }
    }

    End {
    }
}