proc StartAllProtocolsHlt { {platform legacy} } {
    # platform: legacy or ngpf

    if {$platform == "legacy"} {
	set params "::ixia::test_control -action start_all_protocols"
    } 

    if {$platform == "ngpf"} {
	set params "::ixiangpf::test_control -action start_all_protocols"
    } 

    puts "\nStartAllProtocolsHlt: $platform"
    set startProtocolStatus [eval $params]
    if {[keylget startProtocolStatus status] != $::SUCCESS} {
	puts "\nError StartAllProtocolsHlt:  $startProtocolStatus\n"
	return 1
    }

    return 0
}