diff --git a/xCAT/postscripts/confignetwork b/xCAT/postscripts/confignetwork
index 39fce3b8d..47f0e75c5 100755
--- a/xCAT/postscripts/confignetwork
+++ b/xCAT/postscripts/confignetwork
@@ -524,7 +524,10 @@ function configure_nicdevice {
         nic_pair=`echo "$nics_pair" |sed -n "${num}p"`
         echo "configure nic and its device : $nic_pair"
         ipaddrs=$(find_nic_ips $nic_dev)
-        next_nic=$(echo "$nics_pair"|awk /${nic_dev}$/'{ print $1}')
+        # if a device is middle device, it may have no IP, for example, configure eth0->vlan.1->br0, vlan1.1 is middle device
+        # is_mid_device is to label if ${nic_dev} is middle device
+        # if $is_mid_device has value, the ${nic_dev} is middle device, or else, it is not middle device
+        is_mid_device=$(echo "$nics_pair"|awk /${nic_dev}$/'{ print $1}')
         #ignore bmc interfaces. They're allowed in the nics table to generate DNS/hostname records, but they
         #can't be configured here (it's done in bmcsetup
         if [ x"$nic_dev_type" = "xbmc" ]; then
@@ -582,7 +585,7 @@ function configure_nicdevice {
             if [ "$networkmanager_active" = "0" ]; then
                 create_vlan_interface ifname=$vlanname vlanid=$vlanid
             elif [ "$networkmanager_active" = "1" ]; then
-                create_vlan_interface_nmcli ifname=$vlanname vlanid=$vlanid ipaddrs=$ipaddrs next_nic=$next_nic
+                create_vlan_interface_nmcli ifname=$vlanname vlanid=$vlanid ipaddrs=$ipaddrs next_nic=$is_mid_device
             fi
             if [ $? -ne 0 ]; then
                 log_error "configure VLAN failed."
@@ -593,7 +596,7 @@ function configure_nicdevice {
             if [ "$networkmanager_active" = "0" ]; then
                 create_bond_interface ifname=$nic_dev slave_ports=$base_nic_for_bond slave_type=$base_nic_type
             elif [ "$networkmanager_active" = "1" ]; then
-                create_bond_interface_nmcli bondname=$nic_dev slave_ports=$base_nic_for_bond slave_type=$base_nic_type _ipaddr=$ipaddrs next_nic=$next_nic
+                create_bond_interface_nmcli bondname=$nic_dev slave_ports=$base_nic_for_bond slave_type=$base_nic_type _ipaddr=$ipaddrs next_nic=$is_mid_device
             fi
             if [ $? -ne 0 ]; then
                 log_error "configure bond $nic_dev failed."
@@ -628,7 +631,7 @@ errorcode=0
 utolcmd="sed -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/"
 
 #back up all network interface configure files
-nwdirbak="/tmp/"
+nwdirbak=$nwdir".xcatbak"
 ls $nwdirbak > /dev/null 2>/dev/null
 if [ $? -ne 0 ]; then
     log_info "back up $nwdir to $nwdirbak"
diff --git a/xCAT/postscripts/nicutils.sh b/xCAT/postscripts/nicutils.sh
index cd52a76b1..70088a4a4 100755
--- a/xCAT/postscripts/nicutils.sh
+++ b/xCAT/postscripts/nicutils.sh
@@ -2123,7 +2123,7 @@ function create_bond_interface_nmcli {
         if [ $? -eq 0 ] ; then
             is_connection_activate_intime $xcat_slave_con 1
             if [ $? -eq 1 ]; then
-                $nmcli con down $xcat_con_name 
+                $nmcli con down $xcat_slave_con
                 ip link set dev $ifslave down
                 wait_for_ifstate $ifslave DOWN 40 1
             fi