why only 1 nic for each
Hi, first of all, why not use DVS for management, vMotion and vSAN? So much easier to manage. I would assign a different VMK for each service. And in the dvPortgroup teaming policy, add the correct vmnic as active and the other one in standby mode (Configure NIC Teaming, Failover, and Load Balancing on a Distributed Port Group or Distributed Port). Also, use NIOC to prioritize vSAN traffic over management.
Check the DVS MTU configuration. Try vmkping from all vsan vmkernels to all vsan vmkernels with 9000 packets. Try disabling TSO and then try sending 9124 MTU packets. Some switches need that MTU overhead like Dell PowerConnect (Enable or Disable TSO on an ESXi Host ), and please check the switch physical ports, if you have dropped packets or another problem.
Check if vsan VMkernel has only that service enabled, and make sure that vmotion and management only have their services enabled.
A helpful test will be to run the vSAN Network Proactive Test (Proactive Tests )
For the vSAN Cluster Partition alert, please take a look at these articles:
Please let me know! Regards