Hi,
That's right The first KB article is not for SRX 3600 as it does not supoort seelctive traffic in packet mode since it is a High End SRX device.
On High End SRX device you will have to convert the complete device into packet mode as mentioned in the other two KB articles on my previous note.
Thanks,
Pulkit Bhandari
Please mark my response as Solution Accepted if it Helps, Kudos are Appreciated too. 