diff --git a/qemu/tests/cfg/multi_nics_stress.cfg b/qemu/tests/cfg/multi_nics_stress.cfg
index b92d4157fff37d4c2fbc1728f2c137d133c0e1fc..74799bbea23a7c9e29fd62f31801535da3776e59 100644
--- a/qemu/tests/cfg/multi_nics_stress.cfg
+++ b/qemu/tests/cfg/multi_nics_stress.cfg
@@ -23,4 +23,4 @@
         client_path_win = "c:\\"
         test_protocols = "TCP_STREAM TCP_MAERTS UDP_STREAM TCP_RR TCP_CRR UDP_RR"
     Linux:
-        dhcp_cmd = "for nic in `ls /sys/class/net|grep -v lo`;do arp -a|grep -v $nic && dhclient -v $nic;done"
+        dhcp_cmd = "for nic in `ls /sys/class/net|grep -v lo`;do arp -a|grep -v $nic && dhclient -r $nic && dhclient -v $nic;done"