Migration to iSeries and masterkey

Hello,

 

I would like to have some information concerning the migration to Iseries. More precisely I will do a migration from 3600 11.5.3HF2 to Iseries 2600 12.1.1.

 

In the past with old platform (not iseries), I just used ucs with the command line "tmsh load sys ucs name no-license no-platform-check" without other command concerning masterkey. I see for the new platform there is a new migrate option.

 

My questions are the following:

 

1) The masterkey is mandatory? I've heard that i have to know it for this new plaform.

 

2) If it is not configured there is a default configuration?

 

3) If it is mandatory, why my last installation didn't fail?

 

4) If I have to know it, I have to generate a new masterkey?

 

Thank you very much for your help.

 

Best Regards,