I'm using imx6 sabreliteauto with Yocto Linux kernel 3.10.17 and recipe is core-image-x11. The udhcp is used for the getting the dhcp of the eth0 interface at the boot. After booting , If I remove and reconnect the ethernet interface. The udhcp is not run again and no leases file are generated (as in dhclient). I have to manually run the udhcp again to update the dhcp of ethernet interface. How to run the udhcp in background ?