diff --git a/xCAT-nbroot2/ifup b/xCAT-nbroot2/ifup
new file mode 100755
index 000000000..e5d7491e5
--- /dev/null
+++ b/xCAT-nbroot2/ifup
@@ -0,0 +1,4 @@
+if [ "${1%?}" = "usb" ]; then
+	/sbin/setupimmnic
+fi
+exit 0
diff --git a/xCAT-nbroot2/install b/xCAT-nbroot2/install
index a3a49a9d5..d26402c10 100755
--- a/xCAT-nbroot2/install
+++ b/xCAT-nbroot2/install
@@ -609,6 +609,7 @@ inst "$moddir/rsyslog.conf" "/etc/rsyslog.conf"
 inst "$moddir/99-imm.rules" "/etc/udev/rules.d/99-imm.rules"
 inst "$moddir/98-mlx.rules" "/etc/udev/rules.d/98-mlx.rules"
 inst "$moddir/setupimmnic" "/sbin/setupimmnic"
+inst "$moddir/ifup" "/bin/ifup"
 inst "$moddir/loadmlxeth" "/sbin/loadmlxeth"
 dracut_install /sbin/rpc.statd /usr/sbin/sm-notify /etc/netconfig rpcbind /etc/host.conf /usr/sbin/rpc.idmapd
 dracut_install ps free find #debug 
diff --git a/xCAT-nbroot2/setupimmnic b/xCAT-nbroot2/setupimmnic
index a8783e98c..6253727fb 100755
--- a/xCAT-nbroot2/setupimmnic
+++ b/xCAT-nbroot2/setupimmnic
@@ -1,3 +1,4 @@
 #!/bin/sh
 /sbin/ip link set usb0 up
-/sbin/ip addr add dev usb0 169.254.95.120/16
+/sbin/ip addr add dev usb0 169.254.95.120/24
+/sbin/ip route add 169.254.95.120/24 dev usb0