When we upgraded the test server to 11.2GA, sometimes, we saw the test server status is "No COMM", it is hung and can't be come up, we have to reboot the test server or power-cycled.
11.2.1 engineering load would be helpful if the Test Server is recycling due to jumbo message buffers exhausted, it also probably help the Test Server in the hung state. So we provided 11.2.1.15 engineering load to the customer, They don't observe any issue on 11.2.1.15 for now, it seems stable. We are still waiting the next update from the customer.