diff --git a/global_config.yaml b/global_config.yaml
index d47e11b..7e2105a 100644
--- a/global_config.yaml
+++ b/global_config.yaml
@@ -17,5 +17,6 @@
 iperf_deb_package_dir_path: '/opt/packages/'
 iperf_time: 60 # time in seconds to transmit for (iperf -t option)
 multiple_threads_number: 10
+multiple_threads_iperf_utility: "iperf3" # set "iperf" for v2, "iperf3" for v3
 ssh_timeout: 500
 skipped_nodes: []