# Configuring JCnfDemo

The first time you use JCnfDemo, configure the trunk. The parameters you enter are saved in the JCnfDemo configuration file (JCnfDemo.ini or .jcnfdemorc).

To configure JCnfDemo:

Step | Action
1 | Click Configuration > Board Configuration. The JCnfDemo [Trunk Configuration] dialog box displays:
2 | Complete the fields as described in the following table:
Field | Enter the...
--- | ---
Board identifier | Trunk board identifier as defined in the board keyword file.
Protocol | Line protocol.
Number of line(s) | Number of lines to start on the trunk interface.
3 | Click OK. The configuration file is updated.
4 | Close and restart JCnfDemo to apply the changes.