esxcli network nic down -n vmnicXVMware ESXi
The issue is caused by a communication failure on a specific physical uplink. When the ESXi host reboots, the teaming policy when active-active may select the faulty NIC as the active path for the vmk0 interface.
Workaround:
For standard switches:
Host > Configure > Networking > Virtual Switches
Permanent Fix:
Reach out to your physical network team to check why traffic is not passing through the faulty vmnicX.
The following steps can be followed:
Other Reference articles: After rebooting or updating ESXi, the host loses network connection