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ESXi 6.0 host loses network connectivity randomly (2124669)

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After installing or upgrading to ESXi 6.0, the host loses network connectivity randomly and goes to a Non Responding state. 

Note: For additional symptoms and log entries, see the Additional Information section.


This issue is resolved in ESXi 6.0 Update 1a, available at VMware Downloads.

Additional Information

You experience these additional symptoms:

  • In the /var/log/vmkernel.log file, there is evidence of transmit timeouts. This is often logged by the NETDEV WATCHDOG service in ESXi. You may see entries similar to:

YYYY-MM-DDT21:35:34.007Z cpu0:33245)WARNING: LinNet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic0: transmit timed out

YYYY-MM-DDT21:35:34.007Z cpu0:33245)WARNING: at vmkdrivers/src_92/vmklinux_92/vmware/linux_net.c:3707/netdev_watchdog() (inside vmklinux)

Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.

  • This issue can impact multiple network adapter types across multiple hardware vendors. The exact logging that occurs during a transmit timeout may vary from card to card.

See Also

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.


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  • 116 Ratings