Yes they are on the same LANs. We started to figure out that cables which we are connecting G1 with G1 ports are profinet net cables with 4 leads specification shows that they are 100mb not 1000mb to for transferring data.
The issue has been solved by changing port speed to 100mb on both ports, but still question why in Auto speed is not working.
On next project we need to change our design, because I don’t like to play with ports settings. always some issues is coming across