@viragomann I have created an isolated lab for this. Slightly different ranges.
Source site = 172.16.43.0/24
Target site = 172.16.200.0/24
Isolated network on target side = 172.16.210.0/24
IPSEC Interface
FW rules any/any on IPV4.
Also enabled sloppy mode.
No joy.
4929c874-460c-4515-8f2c-aa337c71baac-image.png
I was tinkering with Outbound NAT rules for the interfaces to be able to route between each other which led to different results on a picture capture. Not sure if any specific outbound NAT would be required here:
48f545fb-1a9d-4de9-853c-1d6257f94cc4-image.png
273b324f-1ed5-4c5f-9f3f-14e71c51df30-image.png