LAN Interface Showing 5 Errors (OPNsense 25.1.7 Hardware) — How to Troubleshoot?

[Cipher]

Hi all,

I'm running OPNsense 25.1.7_4-amd64 (FreeBSD 14.2-RELEASE-p3, OpenSSL 3.0.16) on a hardware appliance (not virtualized).
Today I noticed that the LAN interface is showing 5 errors in the interface statistics.

The network seems to be functioning fine, but I would like to understand:

where these errors come from,

whether I should be worried about them,

and what steps I can take to troubleshoot the issue.

Questions:

What types of errors are reported under the LAN interface stats (CRC errors, packet drops, collisions, etc.)?

Is there a log or diagnostic view in OPNsense where I can see more detail about these errors?

Could they be caused by bad cables, switch ports, or NIC driver issues?

Is a small number of errors (5 errors) considered normal, or does it point to a potential problem?

What steps would you recommend to troubleshoot and hopefully eliminate the cause?

System Details:

OPNsense version: 25.1.7_4

FreeBSD: 14.2-RELEASE-p3

Appliance type: hardware

LAN NIC: Intel(R) I211 (Copper)

Thanks for any advice or experiences you can share!