Virtual Machines or ESX host network interruption with “Receive CRC errors” statistics increased rapidly

Products

• VMware vSphere ESXi

Issue/Introduction

You may see symptoms similar to:

• Virtual Machines or ESX host network interruption may occur

• ESX is not responding and residing VM's are disconnected.

To verify CRC issues:

• Run esxcli network nic stats get -n vmnic<#> shows CRC errors increased rapidly
  
  Receive CRC errors: <####>   <-----This number increased

 

Environment

vSphere ESXi 7.0

vSphere ESXi 8.0

Cause

• A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data.
• CRC error: FCS (Frame Check Sequence) field contains a 4-byte CRC value used for error checking.
• When a source host assembles a packet, it performs a CRC calculation on all fields in the packet except the Preamble, SFD (Start Frame Delimiter), and FCS using a predetermined algorithm.
• For an explanation of CRC operation please see
  • Cyclic Redundancy Check (CRC)/Checksum Considerations

Resolution

Please reach to respective hardware vendors(Physical Switch/Cable/Network Adapter) to troubleshoot further.

 

Additional Information

For more information about NIC errors, please refer to Troubleshooting NIC errors and other network traffic faults in ESXi