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Knowledge Base

Intel 82571 NICs intermittently lose connectivity with ESX 4.x (1010313)

Last Updated: 4/7/2021Categories: How toTotal Views: 25502Language:
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Details

Intel 82571 based physical network interfaces using the Intel e1000e driver may lose connectivity on ESX or ESXi 4.x

Loss of connectivity may occur if you use this network interface:

To configure a VMkernel network to access an iSCSI storage or a NAS storage

To add a connection an iSCSI Target.

To add a connection to an NFS datastore.

To start an I/O operation to an iSCSI LUN or NFS Datastore.

As an uplink for a virtual switch.

The VMkernel.log file, located at /var/log/vmkernel, may contain the warning:

cpu8:4220)WARNING: LinNet: netdev_watchdog: NETDEV WATCHDOG: vmnic2: transmit timed out

Solution

This issue may occur if the Message Signaled Interrupt (MSI) mode is enabled for the e1000e driver and this mode is not supported in a server platform. This driver supports these three interrupt modes:

Legacy

MSI

MSI-X

ESX 4.0 added support for Message Signaled Interrupts in network and storage drivers. The default interrupt mode for the e1000e driver under ESX 4.x is MSI (1).

To configure the e1000e driver to use Legacy (0) Interrupt mode:

Caution: Perfrom these steps only on the e1000e driver. If you perform these steps on other network drivers, network cards may not appear after a reboot. If a network card does not appear after making this change, revert it.

Open a console to the ESX or ESXi host. For more information, see Unable to connect to an ESX host using Secure Shell (SSH) (1003807) or Using Tech Support Mode in ESXi 4.1 (1017910).

To configure the e1000e module option IntMode and use Legacy (0) interrupts for a 4-port NIC, run the command:

esxcfg-module -s IntMode=0,0,0,0 e1000e

Note: A mode number must be specified for each NIC port. In case of 2 quad port NICs, specify the mode 0 for all 8 ports with the command:

esxcfg-module -s IntMode=0,0,0,0,0,0,0,0 e1000e

On ESX host, run this command to rebuild initrd:

esxcfg-boot -b

Note: This step is not applicable to ESXi hosts.

Reboot the ESX/ESXi host for the changes to effect.

If network cards do not appear after making this change, revert it.

If the issue persists, see ESX/ESXi hosts has intermittent or no network connectivity (1004109).

To revert the change:

Open a console to the ESX or ESXi host. For more information, see Unable to connect to an ESX host using Secure Shell (SSH) (1003807) or Using Tech Support Mode in ESXi 4.1 (1017910).

Run this command to remove the e1000e module options:

esxcfg-module -s "" e1000e

Run this command to rebuild initrd:

esxcfg-boot -b

Reboot the ESX host for the changes to effect.

Additional Information

For translated versions of this article, see:

日本語: Intel 82571 NIC と ESX 4.x との接続が断続的に失われる (2083543)

简体中文: Intel 82571 网卡间歇性地丢失与 ESX 4.x 的连接 (2087888)

Detectable by VMware SkylineTM

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Attachments

Additional Resources

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

KB
•
VMware High Availability (HA) の無効化 (1008025)

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•
静止スナップショットを取得またはカスタム静止スクリプトを使用すると、負荷がかかった仮想マシンがフリーズすることがある (5962168)

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Related Products:

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