N4064 is the core switch with all VLANs. Core switch has a LAG set to trunk to N2000 switch and the lag is a member of all VLANs. The ports the core are attached to on the N2000 are a LAG set to general. For reasons beyond me, if I change the LAG on the N2000 series to trunk, I loose all management access to the switch. No CLI or Web UI. Interface is not pingable. All other traffic appears to be flow as normal. The LAG is a member of all VLANs on the N2000. Any suggestions?