^Name        ^Base address ^Domain Name     ^
|externalnet | 10.128.24.0 | brightcomputing|
|ipminet     | 172.17.0.0  | ipmi.cluster   |
|internalnet | 172.18.0.0  | eth.cluster    |
|ibnet       | 172.20.0.0  | ib.cluster     |

During bright cluster manager installation, network information can be provided and automatically configured. "externalnet, ipminet and internalnet" were created during installation. 
Below is how "ibnet" was defined

<code>
 [bright1->network]% add ibnet
 [bright1->network*[ibnet*]]% set baseaddress 172.20.0.0
 [bright1->network*[ibnet*]]% set domainname ib.cluser
 [bright1->network*[ibnet*]]% set netmaskbits 24
 [bright1->network*[ibnet*]]% set mtu 2044
 [bright1->network*[ibnet*]]% set nodebooting yes
 [bright1->network*[ibnet*]]% set type internal
 [bright1->network*[ibnet*]]% commit
</code>

Important: Bright sets a range on the network to issue ip address. If you do not want this, add the following to the configuration

<code>
 [bright1->network*[ibnet*]]set dynamicrangestart 172.20.0.2 
 [bright1->network*[ibnet*]]set dynamicrangeend 172.20.0.30
 [bright1->network*[ibnet*]]commit
</code>