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Then the network needs at least one subnet; and the first subnet is created in the "subnet" pane. Give it a name, and select an IP range. It is recommended to use some RFC1918 adresses, which includes these network blocksis not in use elsewhere in NTNU. The current official use of RFC1918 is:

• 10.0.0.0/8 - Used within NTNU, and is thus not recommended used in openstack networks.
• 172.16.0.0/16 - Used as floating-IP's in skyhigh.hig.no; free in other clouds
• 172.17.0.0/16 - Used within NTNU in Gjøvik, and is thus not recommended used in openstack networks.
• 172.18.0.0/1215 - Free
• 172.20.0.0/14 - Free
• 172.24.0.0/13 - Free
• 192.168.0.0 - Partly used in NTNU Ålesund (subnets listed below). The rest is free.
  
  • 192.168.10.0/24
  • 192.168.30.0/24
  • 192.168.50.0/24
  • 192.168.90.0/24
  • 192.168.110.0/24
  • 192.168.114.0/24
  • 192.168.201.0/24
  • 192.168.212.0/24
  • 192.168.221.0/24
  • 192.168.222.0/
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• • 24
  • 192.168.223.0/24

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• • 192.168.224.0/24

The final part of the network configuration dialog is to define additional DHCP parameters for any hosts placed in this network. The defaults (shown in the picture) is sufficient, but the following can be defined if wanted:

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