NUC with Roon ROCK experiencing CRC errors on Meraki switch (ref#7RPS8H)

Support
1

Hi! What’s not quite right with Roon?

· None of the above quite fits

None of the above quite fits

· None of these quite match

Tell us what's going on

· my Meraki switch signals a Very high proportion of CRC errors on the port where the NUC with Roon Rock is connected. switching lan cable and port doesn’t make any difference. Q: has it anything to do with Roon and the last Rock update?

Tell us about your home network

· switch is Meraki 220

2

Hello @pj.nijhof

Thank you for reaching out and providing those details.

To answer your question directly: CRC (Cyclic Redundancy Check) errors indicate that your Meraki switch is receiving physically corrupted network frames from the NUC. Because this is a hardware and data-link layer issue, it is highly unlikely to be caused by the core Roon software, as these errors are generated on the L1 or L2 level of the OSI model, while the Roon software works on the L7. While a Roon OS (ROCK) update could theoretically involve changes to the underlying Linux network drivers, 99% of the time, CRC errors point to a physical network or negotiation issue.

Since you have already ruled out the cable and the switch port, here are the most likely culprits and next steps:

  1. Speed/Duplex Mismatch: Please check your Meraki dashboard for the specific port connected to the NUC. Ensure it is set to "Auto-negotiate". If the port is hardcoded to a specific speed/duplex (e.g., 1 Gbps / Full Duplex) and the NUC is attempting to auto-negotiate, it will cause a mismatch leading to these exact errors.
  2. Electromagnetic Interference (EMI): Are the NUC or the Ethernet cable placed very close to heavy power supplies, large amplifiers, or unshielded power cables? High EMI can corrupt data packets in transit, regardless of how new the ethernet cable is.
  3. NUC Hardware Degradation: It is possible that the physical Ethernet port or network controller on the NUC itself is failing.
Next troubleshooting step: If possible, try connecting an inexpensive USB-to-Ethernet adapter to one of the NUC's USB ports and connect that to the switch instead. If the CRC errors stop, it confirms the onboard Intel network interface on the NUC has a hardware fault.

Let us know what you find in the Meraki dashboard or if a USB adapter resolves the issue!