I have been asking for basically the same question re IEEE802.3ad dyn agg lacp issue month ago. No luck.
Moreover more than hundred posts via email chain with intel support. No luck.
They don't know the answer
One Q: do you have the heavy traffic load once the adapter goes off-line?
We have the same issue with our Commvault Mediaagent that use Intel Gigabit ET Quad Port server Adapter in a LACP team of 4 NICs.
It happens when traffic is getting high.
Proset Version 188.8.131.52
Driver version 184.108.40.206
OS: Windows 2012 with latest patches
I think it has something to do with the settings
Check Time or Load Balance Refresh Rate, maybe somebody from Intel could reply?
Just installed driver version 18.6 but still the same issues.
Nics are disconnect at random.
Any resolution on this issue? Having the same issues with the I350 ET Dual Port. Disconnects/Freezes during high traffic and Server 2008 also throwing out Event ID 2012 SRV in event log all day during peak traffic. Installed the latest drivers two weeks ago. Event Log Warnings 11, 13, 14, 27, but normally overnight and not during the work hours.
We will check on this.
Please provide the exact switch model and config.