Traffic filtering using PowerCLI

I have been searching for a powercli script to add/update/drop traffic filtering in a Distributed Port Group. After looking through the forums I found something that might work but I am facing some issues.

$dvSwName = 'vDSwitch VDS'
$dvPgNames = 'vCenter Server' 

$dvSw = Get-VDSwitch -Name $dvSwName 

# Enable LBT
foreach($pg in (Get-View -Id  $dvSw.ExtensionData.Portgroup | Where {$dvPgNames -contains $_.Name})){    $spec = New-Object VMware.Vim.DVPortgroupConfigSpec    $spec.ConfigVersion = $pg.Config.ConfigVersion    $spec.DefaultPortConfig = New-Object VMware.Vim.VMwareDVSPortSetting    $spec.DefaultPortConfig.FilterPolicy = New-Object VMware.Vim.DvsFilterPolicy    $filter = New-Object VMware.Vim.DvsTrafficFilterConfig    $filter.AgentName = 'dvfilter-generic-vmware'     $ruleSet = New-Object VMware.Vim.DvsTrafficRuleset    $ruleSet.Enabled = $true    $rule =New-Object VMware.Vim.DvsTrafficRule    $rule.Description = 'Traffic Drop Rule'    $rule.Direction = 'both' #'outgoingPackets'     $action = New-Object VMware.Vim.DvsDropNetworkRuleAction        $qualifier = New-Object VMware.Vim.DvsIpNetworkRuleQualifier    $qualifier.Protocol = ${6}    $qualifier.DestinationAddress = ${ip:192.168.9.97}    $qualifier.SourceAddress = ${ip:192.168.9.97}    #$action.QosTag = 4    $rule.Action += $action    $rule.Qualifier += $qualifier    $ruleSet.Rules += $rule          $filter.TrafficRuleSet = $ruleSet    $spec.DefaultPortConfig.FilterPolicy.FilterConfig += $filter    $pg.ReconfigureDVPortgroup($spec)
}

1. This seems to create a Drop rule but the qualifier section does not seem to work. Protocol, DestinationAddress and SourceAddress are not used instead everything is taken as any instead.

How would I resolve this issue ?

2. The allow rule should follow a similar syntax I am assuming?

3. Also how do I remove an existing rule from the traffic filtering ruleset?