# show sndcp statistics verbose

Table 1. show sndcp statistics verbose Command Output Descriptions

Field | Description
--- | ---
SNDCP Data Statistics:
Un-Acknowledged mode:
SN-PDUs received | Description: This proprietary counter indicates the total number of SN-PDUs received by SNDCP. Triggers: Increments when an SN-PDU is received by SNDCP. Availability: per SGSN service
SN-PDU Bytes received | Description: This proprietary counter indicates the total number of SN-PDU bytes received by SNDCP. Triggers: Increments when an SN-PDU is received by SNDCP. Availability: per SGSN service
SN-PDUs dropped | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to various reasons. Triggers: Increments when SN-PDUs are dropped at SNDCP for various error cases as explained by the specific Drop reason counters below. Availability: per SGSN service
SN-PDU Bytes dropped | Description: This proprietary counter indicates the total number of SN-PDU bytes dropped at SNDCP due to various reasons. Triggers: Increments when SN-PDUs are dropped at SNDCP for various error cases as explained by the specific Drop reason counters below. Availability: per SGSN service
SN-PDU Drop Reason:
Invalid SAPI State | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to invalid SAPI state. Triggers: Increments when SN-PDUs are received in invalid SAPI state. Availability: per SGSN service
Invalid PDP Ctx | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to invalid PDP context. Triggers: Increments when SN-PDUs are received by a non-existent PDP Context or non-existent subscriber. Availability: per SGSN service
Decode Failure | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to decode failure. Triggers: Increments when Decode failures occur for SN-PDUs. Availability: per SGSN service
Reassembly Drops:
Discard State | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP in discard state. Triggers: Increments when SN-PDUs are dropped and an unexpected segment is received to enter discard state. SNDCP entity expects either a first segment or subsequent segment. Reception of last segment clears this state. Availability: per SGSN service
Rx First Seg State | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP in Receive First Segment state. Triggers: In receive first segment state, only first segment of N-PDU is expected. If subsequent segmented is received, it is dropped with this reason and enters discard state. Availability: per SGSN service
Rx Subsequent Seg State | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to reassembly failure. Triggers: In receive subsequent segment state, only subsequent segments of N-PDU are expected. If first segment is received, it is dropped with this reason and enters discard state. Availability: per SGSN service
New First Segment | Description: This proprietary counter indicates the total number of buffered SN-PDUs dropped at SNDCP due to reception of new N-PDU. Triggers: Increments when reception of new N-PDU drops buffered SN-PDUs, if any with this reason. Availability: per SGSN service
Reassembly Failure | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to reassembly failure. Triggers: Increments when SN-PDUs are dropped at SNDCP due to reassembly failure. Availability: per SGSN service
Reassembly Timeout | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to reassembly timeout. Triggers: Increments when the buffered segments are dropped and the last segment is not received before reassembly timer expiry. Availability: per SGSN service
DCOMP Error | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to DCOMP (Data Compression algorithm ID) error. Triggers: Increments when SN-PDUs are received with invalid DCOMP value or DCOMP value different from that negotiated between MS and SGSN. Availability: per SGSN service
PCOMP Error | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to PCOMP (Protocol Header Compression algorithm ID). Triggers: Increments when SN-PDUs are received with invalid PCOMP value or PCOMP value different from that negotiated between MS and SGSN. Availability: per SGSN service
PDP Ctx Modified | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to PDP modification. Triggers: Increments when buffered data segments (SN-PDUs) are dropped during PDP context modification. Availability: per SGSN service
PDP Ctx Deleted | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to PDP deletion. Triggers: Increments when buffered data segments (SN-PDUs) are dropped at SNDCP due to PDP context deletion. Availability: per SGSN service
Other Reasons | Description: This proprietary counter indicates the total number of SN-PDUs dropped at SNDCP due to any other reason than those mentioned above. Triggers: Increments when buffered data segments (SN-PDUs) are dropped at SNDCP due to other reasons than those mentioned above. Availability: per SGSN service