Okay!
I tried your command via my iPhone with VPN.
But force option wasn't accepted to MLNX-OS.
I think if there is a modification on default partition then MLNX-OS apply the modification to all othere partition.
If I change MTU to 4k on all of non-default partition & not default partition then my all ESXi host don't accept to change to vSwitch's
MTU to 4092. If I change default partition's MTU to 4k then all of my ESXi host accept change vSwitch's MTU to 4092.
All of ESXi host pinging to each others on default partition, but can' non-default partition.
That's a very curious status.
I'm also experienced your 4036, 5035, too.
But 2 previous generation switch works well with 4k MTU partition with ESXi host.
Sure! When disable default partition's IPoIB then another partition's IPoIB also disabled.
But I saw a IBTA eBook that show me a partition concept that include effective routing and security.
If current MLNX-OS can't support I don't concern about it.
2k MTU also show a reasonable performance and best practice for latency aspect.
Could you check it again?