...

• Scenario descriptions (components using ISTIO, and components not using ISTIO etc).
• Communication between components that are using ISTIO
• Communication between components that are using ISTIO and those that are not using ISTIO.
• Overall ONAP cert management and AAF.  This should consider how it is viewed from the ONAP users perspective
• ONAP project requirements

Experiment 

Coexistence of ISTIO CA and AAF CA  AND secure communication along with Authentication & Authorization is covered in this presentation: https://wikilf-onap.onapatlassian.orgnet/wiki/download/attachments/822571616231787/ISTIO-Envoy-MutualTLS_v2.pptx?api=v2

With respect to non-security related to ISTIO such as "Service registration/discovery" is overlapping technology with MSB.  We will need to ensure that existing ONAP projects & Projects that get enhanced to use ISTIO will work together.

...