Unknown-mme-ue-s1ap-id Official

If the eNodeB still holds a stale context and sends a message (e.g., a Handover Required or Uplink NAS Transport) using the old MME UE S1AP ID , the MME responds with unknown-mme-ue-s1ap-id .

Check for recent MME restarts or "MME Overload" alarms which might cause the core to shed active users to save resources. unknown-mme-ue-s1ap-id