Ping with custom MTU size?

Thanks. I managed to get the following together which seems to work. I want to use it to monitor some remote devices. Thanks for the assistance!

import com.santaba.agent.groovyapi.expect.Expect;
import com.santaba.agent.groovyapi.snmp.Snmp;
import com.santaba.agent.groovyapi.http.*;
import com.santaba.agent.groovyapi.jmx.*;
import org.xbill.DNS.*;
import com.jcraft.jsch.JSch;
import com.santaba.agent.util.Settings;


hostname = hostProps.get("system.hostname")
//hostname = "www.google.com"
mymtu = hostProps.get("custom.ping.mtu")?.toInteger() ?: 1472
pingargs = '-n 4 -f -l $mymtu'
timeout = 15000 // timeout in milliseconds

try {

    def command_output = "ping ${hostname} ${pingargs}".execute().text
    //command_output = command_output.toString()
    //println command_output
        
    packetsSent = (((command_output.findAll(~/(?<=Sent = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    packetsReceived = (((command_output.findAll(~/(?<=Received = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    packetsLost = (((command_output.findAll(~/(?<=Lost = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    roundtripMinimum = (((command_output.findAll(~/(?<=Minimum = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    roundtripMaximum = (((command_output.findAll(~/(?<=Maximum = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    roundtripAverage = (((command_output.findAll(~/(?<=Average = )\d+/)).toString()).replaceAll(/\[(\d+)\]/, '$1')).toInteger()
    
    println 'packetsSent=' + packetsSent
    println 'packetsReceived=' + packetsReceived
    println 'packetsLost=' + packetsLost
    println 'roundtripMinimum=' + roundtripMinimum
    println 'roundtripMaximum=' + roundtripMaximum
    println 'roundtripAverage=' + roundtripAverage
        
    return 0
    }
    

catch (Exception e) {
    println "Unexpected Exception : " + e
    return 1
}