New problem has just shown up. For over a year, we 'were' successfully using FreeBSD10.3 on our DELL R740xd systems, using DELL rNDC network boards with Intel X520 - 2 x 10GbE and SFP+ modules connected to a Cisco switch. The connection was set up as a 2 x 10GbE port LAGG with SFP+ modules at both ends. We had no problems with that previous setup. We are in the process (at last 
) of updating to FreeBSD 13.1-REL-p3. We are seeing intermittent LAGG failure where ONE of the two ports fails to restart AFTER A REBOOT. Once the LAGG is OK, it seems to stay that way until the next reboot. Physically disconnecting/reconnecting the 'failed' LAGG port while powered up allows the LAGG to reconnect properly. So the problem 'seems' to be something in the initial 'handshake' as the network initializes. We are still troubleshooting - there are 11 DELL R740xd systems with the same setup. Not sure yet if ALL or just specific systems are failing, or if the failure is one specific port of the LAGG. We have not found any updates to the Intel 'ix' driver. I found some information about an 'ixgbe' driver, but that looks like a dead 'rabbit trail'.
Any suggestions would be appreciated...
) of updating to FreeBSD 13.1-REL-p3. We are seeing intermittent LAGG failure where ONE of the two ports fails to restart AFTER A REBOOT. Once the LAGG is OK, it seems to stay that way until the next reboot. Physically disconnecting/reconnecting the 'failed' LAGG port while powered up allows the LAGG to reconnect properly. So the problem 'seems' to be something in the initial 'handshake' as the network initializes. We are still troubleshooting - there are 11 DELL R740xd systems with the same setup. Not sure yet if ALL or just specific systems are failing, or if the failure is one specific port of the LAGG. We have not found any updates to the Intel 'ix' driver. I found some information about an 'ixgbe' driver, but that looks like a dead 'rabbit trail'.Any suggestions would be appreciated...