Erroneous RX Frame

When an error condition is detected, the Triple Speed Ethernet MAC core validates the frame against the following precedence rules. Only the highest-priority error counter is incremented.

For any error listed below, the Triple Speed Ethernet MAC core performs the following actions:

Asserts rx_axis_mac_tuser to flag the frame as invalid.
Increments the ifInErrors statistic counter.

Table 1. RX Statistic Counter Precedence
Priority	Condition	Statistic Counter Incremented
1 (Highest)	Undersized (Received frame is < 64 bytes)	`etherStatsUndersizePkts`
2	Oversized (Received frame exceeds the configured `frm_length`)	`etherStatsOversizePkts`
3	FCS Error (Received frame has valid size but fails CRC)	`aFrameCheckSequenceErrors`
4 (Lowest)	Length Mismatch (Received frame has valid size, but Length/ Type field does not match actual payload)	`aRxFrameMismatchedLength`