No Such Name (SNMP error # 2)

Dear Bill,

does a new sensor work for this particular interface? If so, could there have been any event which may have caused the router to change the OID for this interface?

Best Regards.

Try to force the snmp index on Cisco routers with : snmp-server ifindex persist

Changing the version of the SNMP protocol from v2c to v1 works for me.

hello i have problem to add a sensor for serial-interface in cisco 3825 main purpose for this sensor is discovering status of serial port

Please try How can I see all interfaces when adding an SNMP sensor for my Cisco device?

im sorry i wrong make a question ... i dont have problem with "No Such Name (SNMP error # 2)" my troble is when a auto-discovery my router prtg didnt find a serial interfaces

could you tell me how a shuld add a sensor for monitoring serial interface?

Have you tried the tips from the https://www.paessler.com/knowledgebase/en/topic/803-how-can-i-see-all-interfaces-when-adding-an-snmp-sensor-for-my-cisco-device article?

its not working, i try add a sensor:

1) add sensor 2) snmp library 3) cisco-interface 4) i see only numbers of interfacje and a dont know witch of them is serial for example ...

Have you enabled the 32bit counters -> Force-options in the device's Settings (in PRTG) before trying to add the sensor?

yes but still i have the same situation ... i have PRTG Network Monitor 8.1.2.1810 version of prtg

Then please try to use a SNMP Custom Sensor with an explicit OID.

i can't do that my OID is 1.3.6.1.2.1.2.2.1.8 this is a table kind, source. when i try add oid in this way i get "No Such Name (SNMP error # 2)"

Then it might not be possible to monitor this counter with PRTG in the moment.

This happened to me when I was trying to add Errors and Discards on a subinterface. Those counters are only available on the physical interface.