This read-only Counter counts packets discarded because another station on the FDDI ring had already set the frame's E (error) bit before it reached this port. Admins use this counter to identify frames that were already flagged as errored upstream, helping distinguish problems originating elsewhere on the ring from local reception issues. A high sfddiRxEbits count alongside low local error counters suggests the fault lies with another station upstream on the ring, not this port's hardware.