I frequently change my IP address for various reasons. So I created a .cmd to set it to a static IP and one to set it back to DHCP.
The interface name can be found @ Control Panel\Network and Internet\Network Connections and must match .CMD, in this example I will use "Local Area Connection" but you could switch it to Wi-Fi easily etc etc.
To set static IP: [IP ADDRESS] [SUBNET] [GATEWAY]
netsh interface ip set address name="Local Area Connection" static 192.168.2.42 255.255.255.0 192.168.2.254
To set back to DHCP:
netsh interface ip set address name="Local Area Connection" source=dhcp
To change DNS entry 1:
netsh interface ip set dns name="Local Area Connection" static 192.168.1.1
To change DNS entry 2:
netsh interface ip add dns name="Local Area Connection" 220.127.116.11 index=2
To set DNS back to DHCP:
DNS to DHCP
netsh interface ip set dnsservers name="Local Area Connection" source=dhcp
Disable or Enable Interface:
netsh interface set interface name="Wi-Fi" admin=enabled/disabled