Rx FIFO (first-in-first-out) sync errors indicate that the receive
FIFOs used by the BIF-RX circuit either got out of sync with the start of
frames or with each other.
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These errors mean that two frames have been discarded. However, those
frames did not necessarily contain any user data (it is possible that these
frames were fillers known as Null BFrames). When these errors occur
infrequently, the errors are simply counted. If the errors happen too often, a
hardware error is generated because a circuit failure can cause them.
Make sure you use the latest firmware. If the errors continue, replace