linux - The network setting for /etc/network/interfaces for static IP of a supernet address

I want to change my Ubuntu to static IP. My current IP setting is:

eth0      Link encap:Ethernet  HWaddr 00:0c:29:xx:xx:xx  
      inet addr:192.168.16.59  Bcast:192.168.31.255  Mask:255.255.240.0
      inet6 addr: fe80::20c:xx:xx:xx/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:234690 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1864 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:22953435 (22.9 MB)  TX bytes:205616 (205.6 KB)

what should I put as the network in /etc/network/interfaces (note the network mask of 255.255.240.0)?

Answer

If I'm understanding your question, to set a static IP, your network runs from 191.168.16.1 - 191.168.31.254, with the identity address at 192.168.16.0 and the broadcast at 192.168.31.255. I've never had to use the Network keyword, but I've never used a supernet address on a host. I've only seen them used for route aggregation.

 auto eth0
 iface eth0 inet static
 address 192.168.16.59
 network 192.168.16.0
 netmask 255.255.240.0
 broadcast 192.168.31.255
 gateway 192.168.0.1