The RX User Side interface indicates an error condition using the rx_errout
signal.
If rx_errout is asserted, it usually indicates that the packet being
received contains an error. One possible error condition that must be examined
carefully is a missing SOP or EOP. In this event, the Interlaken IP core attempts to
recover the data by merging packets and closing them, presenting the data on the RX
LBUS with an rx_errout indication. You must ensure that the
transmitting device is sending proper SOP and EOP indications.
Ensure that the stat_rx_overflow_err signal is not asserted. If it
is asserted, the RX LBUS is not being clocked fast enough to empty the RX buffer.
The LBUS must have more bandwidth than the Interlaken interface.