If you are experiencing below mention issue in the newly installed or Upgraded 6.0 host . please do follow this KB@ VMware KB: ESXi 6.0 network connectivity is lost with NETDEV WATCHDOG timeouts in the vmkernel.log
- ESXi 6.0 host network connectivity is lost randomly
- ESXi enters into a non-responding state and becomes unmanageable until reboot
- Network connectivity does not return until the ESXi 6.0 host is rebooted
- After rebooting, the issue is temporarily resolved for a period of time, but occurs again after a random interval unless the workaround (script) is implemented
- In the /var/log/vmkernel.log file, there is evidence of transmit timeouts. This is often logged by the NETDEV WATCHDOG service in ESXi.