def DisableSupressArpAllPortsPy(action='', ipType='ipv4'):
    # Description:
    #    This API will automatically disable or enable
    #    suppress ARP for duplicate gateway on all the
    #    ports with ipv4.

    # action = true or false

    # Code logic:
    #    - Verify if the multiValue -pattern is "counter"
    #    - If not, make it counter (so that we could create overlays to modify things.)
    #    - If it is counter, verify if there is any overlay.
    #    - If there are overlays, verify if the correct portName index exists.
    #    - If yes, then change its value true/false.
    #    - If no, create an overlay and set true/false for the portIndex number.

    root = ixNet.getRoot()
    ixNetGlobals = root+'globals'
    globalTopology = ixNetGlobals+'/topology'
    globalTopologyIp = globalTopology+'/'+ipType

    if ipType is 'ipv4':
        supressKey = '-suppressArpForDuplicateGateway'
    else:
        supressKey = '-suppressNsForDuplicateGateway'

    portNameList = ixNet.getAttribute(globalTopologyIp, '-rowNames')
    for portName in portNameList:
        multiValue = ixNet.getAttribute(globalTopologyIp, supressKey)

        try:
            portIndex = portNameList.index(portName)+1
        except:
            print '\nDisableSupressArpAllPorts Error: No such port configured:', portName
            return 1
        else:
            overlayDiscoveredFlag = 0
            overlayList = ixNet.getList(multiValue, 'overlay')
            if overlayList:
                for overlay in overlayList:
                    currentIndex = ixNet.getAttribute(overlay, '-index')
                    if portIndex == currentIndex:
                        overlayDiscoveredFlag = 1
                        print '\nEnableDisableSuppressArpAllPorts = %s' % action
                        ixNetResult = ixNet.setMultiAttribute(overlay,
                                                              '-value', action,
                                                              '-valueStep', action,
                                                              '-count', '1',
                                                              '-indexStep', '0'
                                                              )
                        if ixNetResult != '::ixNet::OK':
                            print '\EnableDisableSuppressArpAllPorts error:', ixNetResult

                        ixNet.commit()

                    if overlayDiscoveredFlag == 0:
                        # Getting here means no overlay index found for the $portIndex.
                        # Have to create an overlay with the proper -index number.
                        print '\nEnableDisableSuppressArpAllPorts: No overlay found for:', portName
                        print 'Creating an overlay ...'
                        currentOverlay = ixNet.add(multiValue, 'overlay')
                        ixNet.setMultiAttribute(currentOverlay,
                                           '-value', action,
                                           '-valueStep', action,
                                           '-count', '1',
                                           '-index', portIndex
                                           )
                        ixNet.commit()
            else:
                # Getting here means there is no overlays.
                # Change the multiValue pattern to counter so that we
                # are able to modify anything
                ixNet.setAttribute(multiValue, '-pattern', 'counter')
                ixNet.commit()
                ixNet.setAttribute(multiValue+'/counter', '-start', 'true')
                ixNet.commit()
                
                print '\nEnableDisableSuppressArpAllPorts: Creating overlay: %s -index %s -value %s' % (
                    portName, portIndex, action)
                # Create Overlays with proper index number based on the portIndex
                # in $root/globals/topology/ipv4 -rowNames indexes
                currentOverlay = ixNet.add(multiValue, 'overlay')
                ixNet.setMultiAttribute(currentOverlay,
                                        '-value', action,
                                        '-valueStep', action,
                                        '-count', '1',
                                        '-index', portIndex
                                        )
                ixNet.commit()
    return 0