This read-only Counter64 counts the number of PPPoE Generic-Error tags received by this AC, a catch-all error signal sent by a peer when something in the discovery or session process failed in a way not covered by more specific tags. A rising count here without more specific error counters (like ServiceNameErrors) climbing alongside it suggests an unusual or unclassified failure mode is affecting subscriber connections. This is often the counter to check first for problems not otherwise categorized, before digging into vendor-specific error codes.