To enable ACF2/IMS security the IMS region need to be cold started or Warm started?

Document ID : KB000014203
Last Modified Date : 14/02/2018
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Question:

To enable ACF2/IMS security the IMS region need to be cold started or Warm started? 

Answer:

When enabling ACF2/IMS a cold start is only required if the NUC is changed. A warm start should be fine.