Function for Interacting with VyOS using Posh-SSH

Invoke-VyOSCommand.ps1

<#
.Synopsis
   Execute commands against VyOS.
.DESCRIPTION
   Execute commands against VyOS using a SSHShellStream.
#>
function Invoke-VyOSCommand
{
    [CmdletBinding()]
    [Alias()]
    [OutputType([int])]
    Param (
        # SSH stream to use for command execution.
        [Parameter(Mandatory=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=0)]
        [Renci.SshNet.ShellStream]
        $Stream,

        # Command to execute on VyOS router.
        [Parameter(Mandatory=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=1)]
        [string]
        $Command
    )

    Begin {
        $promptRegEx = [regex]'[\$%#>] $'
    }
    Process {
        # Discard any banner or previous command output
        do { 
            $stream.read() | Out-Null
    
        } while ($stream.DataAvailable)

        $stream.writeline($Command)

        #discard line with command entered
        $Stream.ReadLine() | Out-Null
        Start-Sleep -Milliseconds 500

        $out = ''

        # read all output until there is no more
        do { 
            $out += $stream.read()
    
        } while ($stream.DataAvailable)

        $outputLines = $out.Split("`n")
        foreach ($line in $outputLines) {
            if ($line -notmatch $promptRegEx) {
                $line
            }
        }
    }
    End{}
}