title: Raspberry Pi configured for static IP also gets a DHCP IP
body: <p>I've configured my Raspberry Pi for static IP. My <code>/etc/network/interfaces</code> looks like this:</p>
  
  <pre><code>auto lo
  iface lo inet loopback
  
  auto eth0
  allow-hotplug eth0
  iface eth0 inet static
  address 192.168.1.2
  netmask 255.255.255.0
  network 192.168.1.0
  broadcast 192.168.1.255
  gateway 192.168.1.1
  </code></pre>
  
  <p>Yet for some strange reason, every time I reboot my Pi or my router, my Pi gets the requested IP (192.168.1.2) but ALSO a DHCP address (192.168.1.18). So my Pi has two addresses.</p>
  
  <p>Of course, this isn't necessarily a problem, I just think it's strange. Am I doing something wrong? Or not enough? My router is almost completely locked down for management, but I can enter static IPs for devices - is this necessary, if I configure the Pi to do it?</p>
  
  <p>The dynamic address isn't apparent in <code>ifconfig</code>:</p>
  
  <pre><code>eth0      Link encap:Ethernet  HWaddr b8:27:eb:5d:87:71
            inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:236957 errors:0 dropped:34 overruns:0 frame:0
            TX packets:260738 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000
            RX bytes:35215632 (33.5 MiB)  TX bytes:70023369 (66.7 MiB)
  
  lo        Link encap:Local Loopback
            inet addr:127.0.0.1  Mask:255.0.0.0
            UP LOOPBACK RUNNING  MTU:65536  Metric:1
            RX packets:27258 errors:0 dropped:0 overruns:0 frame:0
            TX packets:27258 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:3397312 (3.2 MiB)  TX bytes:3397312 (3.2 MiB)
  </code></pre>
  
  <p>yet I can ping, ssh and everything on .18 as well.</p>