Troubleshooting
Problem
Virtual Machines can randomly disconnect from the network when a vswitch is configured with multiple vNICs that originate on the same physical Network Interface Controller (NIC). This is true for any version of VMWare ESXi and any NIC that supports a virtual NIC configuration in firmware: for example, vNIC on Emulex or NIC Partitioning (NPAR) on QLogic.
Resolving The Problem
Source
RETAIN Tip: Not Used
Symptom
Virtual Machines can randomly disconnect from the network when a vswitch is configured with multiple vNICs that originate on the same physical Network Interface Controller (NIC).
This is true for any version of VMWare ESXi and any NIC that supports a virtual NIC configuration in firmware: for example, vNIC on Emulex or NIC Partitioning (NPAR) on QLogic.
Affected Configurations
The system is configured with at least one of the following:
- Lenovo Custom Image for ESXi 5.1.0, any model any Update
- Lenovo Custom Image for ESXi 5.5.0, any model any Update
- Lenovo Custom Image for ESXi 6.0.0, any model anyy Update
- VMware ESXi 5.1, any Update
- VMware ESXi 5.5, any model, any Update
- VMware ESXi 6.0, any model any Update
This tip is not system specific.
This tip is not option specific.
The system has the symptom described above.
Note: This does not imply that the network
operating system will work under all combinations of hardware and
software.
Please see the compatibility page for more information:
http://www.ibm.com/systems/info/x86servers/serverproven/compat/us/
Workaround
Do not configure vSwitches with multiple vNICs that originate on the same physical NIC.
Additional Information
Dividing physical NICs into different parts with NIC firmware is only helpful and supported in ESXi when multiple vSwitches are being used in ESXi.
Document Location
Worldwide
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Document Information
Modified date:
30 January 2019
UID
ibm1MIGR-5098917