public/Get-NextFreeDestinationIp.ps1
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Function Get-NextFreeDestinationIP { <# .SYNOPSIS Returns next free IP on the F5 for virtual server use .DESCRIPTION Returns next free IP on the F5 for virtual server use .Example Get-NextFreeDestinationIP #> process { $uri = $F5Session.BaseURL.Replace('/ltm/','/ltm/virtual?$select=destination') $obj = Invoke-RestMethodOverride -Method GET -URI $uri -WebSession $F5Session.WebSession #capture only ips $ips = $obj.items #trim ips from port $ips = $ips.destination | foreach {$_.substring(0, $_.indexof(':'))} #trim /Common $ips = $ips.Trim('/Common/') #sort ips $ips = $ips | Sort-Object { [version]$_ } #filter ips to sub 5.5.5.5 range $ips = $ips | Where-Object { ([version]$_).major -lt '5' } $last = $ips[-1] $version = [version]$last $last_octet = $version.revision + 1 if ($last_octet -lt 256) { $last = $version.Major.tostring() + "." + $version.Minor.tostring() + "." + $version.Build.tostring() + "." + $last_octet $last } else{ $last = $version.Major.tostring() + "." + $version.Minor.tostring() + "." + ($version.Build + 1) + "." + "1" $last } } } |