How to setup networks (use ethernet)

[Srrbli-23]

I use Cyclone V SoC that has an Arm Cortex-A9 core

I'm sure that my linux kernel and device tree are correct
But I can't get the board ip address when it power up

root@armhf:~# ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

It seems to lack dhcp service...

root@armhf:~# ls /etc/init.d/   
README			checkroot.sh  killprocs		     mountdevsubfs.sh	    procps    rmnologin  udev	       urandom
bootlogs		dbus	      kmod		     mountkernfs.sh	    rc	      sendsigs	 udev-finish
bootmisc.sh		halt	      motd		     mountnfs-bootclean.sh  rc.local  single	 umountfs
checkfs.sh		hostname.sh   mountall-bootclean.sh  mountnfs.sh	    rcS       skeleton	 umountnfs.sh
checkroot-bootclean.sh	hwclock.sh    mountall.sh	     networking		    reboot    ssh	 umountroot

Should I recompile rootfs again?
Thanks

[AyHa1810]

use my rootfs generator jk

You can simply install it in the environment using the following command:

# apt-get install isc-dhcp-server

Or you can add the isc-dhcp-server package in your multistrap*.conf file and then build the rootfs