@DJ Amazing we found this after such a long time of intense digging in packet dumps and testing. Thanks for posting the information on the switch so people can find this here in the forums.
I have though about this but don’t really see why we should “fix” NFS mount to use high source ports. I might be wrong here but from what I have seen in the packet dumps it seems like this is general behavior and changing this would need a fixup deep down in the NFS client libs code - something that we would need to maintain over a long time since I don’t see this change making it into the official code line. What do you think?