proc PortConfigProtocolIntNgpfHlt { portConfigParams } {
    # How to use this from a script:
    #    set portConfig1(-mode)                    config
    #    set portConfig1(-mtu)                     1500
    #    set portConfig1(-protocol_handle)         $deviceGroup1(topo1,groupHandle)
    #    set portConfig1(-ipv4_resolve_gateway)    1
    #    set portConfig1(-ipv4_manual_gateway_mac) 00.00.00.00.00.01
    #    set portConfig1(-gateway)                 1.1.1.11
    #    set portConfig1(-gateway_step)            0.0.0.0
    #    set portConfig1(-intf_ip_addr)            1.1.1.1
    #    set portConfig1(-intf_ip_addr_step)       0.0.0.1
    #    set portConfig1(-netmask)                 255.255.255.0
    #    set portConfig1(-src_mac_addr)            00:01:01:01:00:01
    #    set portConfig1(-src_mac_addr_step)       00:00:00:00:00:01
    #    set portConfig1(-vlan)                    1
    #    set portConfig1(-vlan_id)                 100
    #    set portConfig1(-vlan_user_priority)      3
    #    set portConfig1(-vlan_id_count)           5
    #    set portConfig1(-vlan_id_step)            1
    #    set portConfig1(-vlan_user_priority_step) 0
    # 
    #    set deviceGroup1Topo1 [PortConfigProtocolIntNgpfHlt ::portConfig1]

    upvar $portConfigParams params

    puts "\nPortConfigProtocolIntNgpfHlt ..."
    foreach {properties values} [array get params *] {
	set property [lindex [split $properties ,] end]
	append paramList "$property $values "
    }

    set interfaceConfigStatus [eval ::ixiangpf::interface_config $paramList]
    
    if {[keylget interfaceConfigStatus status] != $::SUCCESS} {
	puts "\nError PortConfigProtocolIntNgpfHlt:\n$interfaceConfigStatus\n"
	return 1
    }

    # keylget interfaceConfigStatus:
    #    ethernet_handle: /topology:2/deviceGroup:2/ethernet:1
    #    ipv4_handle: /topology:2/deviceGroup:2/ethernet:1/ipv4:1
    #    interface_handle: /topology:2/deviceGroup:2/ethernet:1/ipv4:1/item:1
    # interface object = ::ixNet::OBJ-/vport:1/interface:1

    return $interfaceConfigStatus
}