-for SLAVE_DEV in $(cat /sys/class/net/${DEVICE}/bonding/slaves); do
- echo "-${SLAVE_DEV}" > /sys/class/net/${DEVICE}/bonding/slaves
+for SLAVE_DEV in $(cat /sys/class/net/${DEVICE}/bonding/slaves 2>/dev/null); do
+ ip link set "${SLAVE_DEV}" nomaster