Ignore Frame Check Sequence (FCS) Errors

Linux Kernel Upstream Release Notes v6.5

Upon receiving packets, these packets go through a checksum validation process for the FCS field. If the validation fails, the received packets are dropped.

When the FCS feature is enabled (disabled by default), the device does not validate the FCS field even if the field is invalid. The registry key for enable/disable is IgnoreFCS.

It is not recommended to ignore FCS, as the field guarantees integrity of received Ethernet frames.

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