How to enable/disable DHCP of eth0

try this code in android 5.1

ifconfig eth0 up dhcpcd eth0 

OR (static)

ifconfig eth0 192.168.70.65 netmask 255.255.255.0 up 

and now

ndc network create 100 ndc network interface add 100 eth0 ndc network route add 100 eth0 192.168.70.0/24 (gateway) ndc network route add 100 eth0 0.0.0.0/0 192.168.2.40 192.168.2.50 ndc resolver setnetdns 100 localdomain 192.168.2.40 192.168.2.50 (dns1 dns2) ndc network default set 100 

try this way (My Android device worked)

DHCP IP

ifconfig eth0 dhcp 

OR

setprop dhcp.eth0 

OR

dhcpcd -k eth0 dhcpcd -n eth0 

OR

netcfg eth0 dhcp 

OR

getprop dhcp.eth0 

and Static IP

ifconfig eth0 192.168.70.145 netmask 255.255.255.0 up route add default gw 192.168.70.254 dev eth0 

or

su -c ifconfig eth0 192.168.70.145 netmask 255.255.255.0 up route add default gw 192.168.70.254 dev eth0 

Enable Ethernet

ifconfig eth0 up 

Disable Ethernet

ifconfig eth0 down 

and check wlan0 static or dynamic? my device when wlan0 is static force once set eth0 static and after set static change to dynamic

check the device ip:

ip addr 

********** try this android 5.1 ****************** eth0 dhcp

ifconfig eth0 down ifconfig eth0 up dhcpcd -k eth0 dhcpcd -n eth0 netcfg eth0 dhcp