Repeating GPF

Just a quick update from my side on this, problem is not resolved yet, but there is some progress with Netgear support. After first describing my network topology to netgear and allowing netgear tech support ssh access to my ultra 6 device, they quickly decided to RMA my box. Even though the RAM test and disk test is fine and I've tried factory defaulting without success. Well, RMA took some time as usual, they still haven't picked up my old device (I opted for the advance exchange rma procedure, not free). Now the new box they sent me has been running for 3-4 weeks, and them boom, same thing happened again, well almost same thing, there is no "general protection fault" message in the log, but it did crash badly with lots of errors and call trace in the log. So I'm in contact with support again and they again want ssh access to my box. In the mean time I'm following this thread: https://www.readynas.com/forum/viewtopic.php?t=69606&p=386216 which seems to be related. I do have 100mbps switch connected to my box ( in addition to a 1gbps on the other port). But it seems a bit strange that having 100mbps switch should cause such problems... Well, still waiting a resolve for these issues, been almost 8 months since this issue first appeared for me. At least I feel Netgear is taking it seriously now. Also a bit comforting to see others on here with exactly the same symptoms, then it is even more likely that Netgear looks at this seriously.