I modify dhcp to static in /etc/network/interfaces (like below).

# The primary network interface

auto eth0

iface eth0 inet static

netmask 255.255.0.0

address 10.10.130.128

gateway 10.10.1.1

Then restart the interface.

$ sudo ifdown eth0; sudo ifup eth0

...

$ ifconfig

eth0      Link encap:Ethernet 

          inet addr:10.10.130.128  Bcast:10.10.255.255  Mask:255.255.0.0

So the new address kicks in.

But DHCP is still there?

$ ps aux | grep dhc

root    ... dhclient3 -e IF_METRIC=100 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases -1 eth0

Is that normal? If not, how to restart interface in static IP while stop DHCP at the same time?

Thanks a lot.