Hi, I'm trying to add a traffic sensor to monitor the bandwidth used in a couple of ports in a switch. When I run the Test with the Paessler SNMP Tester, with the OID needed, I get : 

Paessler SNMP Tester 5.2.3 Computername: JAPON Interface: 192.168.0.171
27/12/2016 9:59:56 (10 ms) : Device: 192.168.0.248
27/12/2016 9:59:56 (14 ms) : SNMP V2c
27/12/2016 9:59:56 (19 ms) : Custom OID 1.3.6.1.2.1.1.3.0
27/12/2016 9:59:56 (29 ms) : SNMP Datatype: ASN_TIMETICKS
27/12/2016 9:59:56 (34 ms) : -------
27/12/2016 9:59:56 (38 ms) : Value: 146053400
27/12/2016 9:59:56 (43 ms) : Done

If I read the uptime device I get:

Paessler SNMP Tester 5.2.3 Computername: JAPON Interface: 192.168.0.171
27/12/2016 10:18:36 (37 ms) : Device: 192.168.0.248
27/12/2016 10:18:36 (42 ms) : SNMP V2c
27/12/2016 10:18:36 (48 ms) : Uptime
27/12/2016 10:18:36 (58 ms) : SNMP Datatype: ASN_TIMETICKS
27/12/2016 10:18:36 (63 ms) : -------
27/12/2016 10:18:36 (77 ms) : DISMAN-EVENT-MIB::sysUpTimeInstance = 146165800 ( 16 days )
27/12/2016 10:18:36 (97 ms) : SNMP Datatype: SNMP_EXCEPTION_NOSUCHOBJECT
27/12/2016 10:18:36 (107 ms) : HOST-RESOURCES-MIB::hrSystemUptime.0 = No such object (SNMP error # 222) ( 0 seconds )
27/12/2016 10:18:36 (118 ms) : Done

I think I am receiving data via SNMP, but when I try to add the sensor, I get the message "SNMPERR_BAD_ASN1_BUILD (SNMP error # -11)"

I am using the same community string in both softwares (PRTG and SNMP Tester).

Can you help me to solve this issue?

Thank you.

Regards, Pablo Verón.

Article Comments

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Hello Pablo,
thank you for your KB-Post.

Your troubleshooting steps are correct, the sensor should be working since the SNMP Tester does get a valid reply. Please confirm, does an "SNMP Custom" sensor deployed on this OID work?

1.3.6.1.2.1.1.3.0

The SNMPERR_BAD_ASN1_BUILD (SNMP error # -11) is an underlying error caused by the SNMP Components. Which PRTG version are you running? Please update your PRTG deployment to the latest available version (this can be done via auto-update) and let us know whenever the issue persists after the update.

Best Regards,
Luciano Lingnau [Paessler Support]


Dec, 2016 - Permalink