In the Domain Name box, type a name for the new security domain.
In the device list, choose the devices that you want to be in the new security domain. You can use Shift+click and Ctrl+click to select multiple devices.
Click OK
Security Manager creates a new security domain containing the selected devices.
Note:
After creating a security domain, you must set the RWA community for the domain before you can use the security domain. For more information, see Setting security domain properties.