topic Re: SNMP extension V2 and Bulk requests in Extensions

SNMP extension V2 and bulk requests

olivier_coliber — Thu, 18 May 2023 09:34:29 GMT

Hi,

I have some snmp v2c devices to monitor.

I tryed to poll them with snmp generic extension.

In ruxitagent_extensionsmodule_xxx.log i found messages like this :

{"extensions":[{"id":"snmp","extension":"com.dynatrace.extension.snmp-generic-device","tasks":[{"task":"-7234474320797872862","configurationId":"750b27da-1633-3d8f-bd40-0c0d9afa1fe5","compositionStatus":"DEVICE_CONNECTION_ERROR","message":"DEVICE_CONNECTION_ERROR: (host=10.63.207.117): connection problem due to wrong community name or network problems.: Query caused a network error with the need to reconnect (host=10.63.207.117): read udp 10.117.72.54:36721->10.63.207.117:161: i/o timeout: GetBulk returned an error: request timeout (after 3 retries) [status code=27] [status code=38] [status code=38]; "}

But when i poll this device with snmpwalk from ActiveGate, it work's, I retrieve interfaces status... etc.

There is no configuration mistakes (same community, same IP, same ActiveGate).

Is this could be come from plugin GetBulk request? My device coud be not compliant with these requests? In this case ,someone knows how to force extension to use Get Next request?

Thanks

Olivier

Re: SNMP extension V2 and Bulk requests

ChadTurner — Wed, 18 Jan 2023 21:00:07 GMT

@olivier_coliber are you still having this issue?

Re: SNMP extension V2 and Bulk requests

GardenGroom — Mon, 17 Apr 2023 13:40:25 GMT

Hello there,

diggin' out that topic as i got similar problems:

activated the generic snmp devices plugin and added a configuration with a bunch of devices to monitor.

Running into errors as the log tells me the same things like Oliver described, bulk requests on a specific OID runs into timeout on a devices, which causes the devices from the whole configuration to get inactivated (the icons are greyed out and no data is available, sometimes it works, sometimes not).

My workaround was creating configuration per devices, so no other devices would be affected because one isn't reachable, but i'm sure it's not the way it was intended to use.

Re: SNMP extension V2 and Bulk requests

Mike_L — Fri, 19 May 2023 10:40:50 GMT

If it is working sometimes and sometimes not I’d open a support ticket for it if I were you.

Re: SNMP extension V2 and bulk requests

Mike_L — Fri, 19 May 2023 10:41:51 GMT

SNMP extensions always use GetBulk. Maybe try to execute such a request manually and see if it works on your device?

Re: SNMP extension V2 and Bulk requests

GardenGroom — Fri, 19 May 2023 10:44:38 GMT

Already done - seems to be a problem when you got more devices in a single configuration. Having only one device per configuration works better. Got the information it should be fixed in Q3/23.

Re: SNMP extension V2 and Bulk requests

Mike_L — Fri, 19 May 2023 10:48:15 GMT

By then we will automatically split up all endpoints within one monitoring configurations to different AGs in the group.

Until then, you can also try to increase the limit on the AG to high or (if you are on 265+) dedicated limits.