eG Monitoring
 

Measures reported by CtxNsSnmpTest

The CtxNsSnmpTest enables administrators to monitor the SNMP traffic processed by the Citrix ADC appliance, so they can promptly capture:

  • Sudden and significant surges in the SNMP traffic;

  • Drops in SNMP requests;

  • Abnormal SNMP messages;

  • Errors in SNMP traffic

  • SNMP packets dropped and the reasons for the same;

Outputs of the test: One set of results for the Citrix ADC VPX/MPX appliance being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Pkts_received Indicates the number of SNMP packets received during the last measurement period. Number

Track the variations in the values of these measures across time to promptly capture steady / sporadic rise in SNMP traffic.

Pkts_sent Indicates the number of SNMP packets transmitted during the last measurement period. Number

Track the variations in the values of these measures across time to promptly capture steady / sporadic rise in SNMP traffic.

Get_req_recv Indicates the number of SNMP Get-Request PDUs that have been accepted and processed during the last measurement period. Number

 

Get_next_req_recv Indicates the number of SNMP Get-Next PDUs that have been accepted and processed during the last measurement period. Number

 

Get_bulk_req_recv Indicates the number of SNMP Get-Bulk PDUs that have been accepted and processed during the last measurement period. Number

 

Responses_sent Indicates the number of SNMP Get-Response PDUs that have been generated by the NetScaler during the last measurement period. Number

 

Traps_mgs_sent Indicates the number of SNMP Trap PDUs that have been generated by the NetScaler during the last measurement period. Number

 

Req_dropped Indicates the number of SNMP requests dropped during the last measurement period. Number

Ideally, the value of this measure should be 0.

Asn_Ber_errs_in_req Indicates the number of ASN.1 or BER errors encountered when decoding received SNMP Messages during the last measurement period. Number

ASN.1 is a flexible notation that allows one to define a variety data types, from simple types such as integers and bit strings to structured types such as sets and sequences, as well as complex types defined in terms of others. BER describes how to represent or encode values of each ASN.1 type as a string of eight-bit octets.

Unsup_snmp_version Indicates the number of SNMP messages received, which were for an unsupported SNMP version during the last measurement period. Number

Ideally, the value of this measure should be 0.

Unknown_com_name Indicates the number of SNMP messages received, which used an SNMP community name not known to the NetScaler during the last measurement period. Number

Ideally, the value of this measure should be 0.

No_permis_on_com Indicates the number of SNMP messages received during the last measurement period that represented an SNMP operation which was not allowed by the SNMP community named in the Message. Number

Ideally, the value of this measure should be 0.

Unsupport_sec_level Indicates the number of SNMP packets that were dropped during the last measurement period because they requested a security level that is unknown to the NetScaler appliance or otherwise unavailable. Number

Ideally, the value of this measure should be 0.

Not_in_time_window Indicates the number of he SNMP packets that are dropped during the last measurement period because they appeared outside the Window of the authoritative SNMP engine. Number

Ideally, the value of this measure should be 0.

Unknown_user_name Indicates the number of SNMP packets that are dropped during the last measurement period because they referenced a user that is not known to the SNMP engine. Number

Ideally, the value of this measure should be 0.

Unknown_engine_id Indicates the number of SNMP packets that are dropped during the last measurement period because they referenced an SNMP engine ID that is not known to the NetScaler appliance. Number

Ideally, the value of this measure should be 0.

Wrong_digest_value Indicates the number of SNMP packets that were dropped during the last measurement period because they do not contain the expected digest value. Number

Ideally, the value of this measure should be 0.

Decryption_errors Indicates the number of SNMP packets that were dropped during the last measurement period because they cannot be decrypted. Number

Ideally, the value of this measure should be 0.