How to disable combining SNMP varbinds (getbulk)?

[sergio.cricca]

Beside of NetApp monitoring (I have the same problem with version 2.2.3 and SNMP bulk), I would like to add that I have same behavior while getting SNMP bulk values from MikroTik routers.
The problem is that I cannot access to the router interface(because it's ISP property) and I cannot check CPU usage via SNMP, when I cannot get SNMP values at all.

[asaveljevs]

Sergio, could you please describe a bit more how does the MikroTik problem manifest itself? As in NetApp, is it just the CPU that is wrong or there is some irregularity in the packets? You might wish to add information to https://support.zabbix.com/browse/ZBX-8185 where another user also talks about MikroTik.

[sergio.cricca]

about mikrotik monitoring:

I've created a Template with SNMP LLD for ALL network interfaces.
It is supposed to get standard values as in image (and create graphs based on LLD):


Working as expected since 2.0.1 (first time I set up this template).
After I upgraded to v 2.2.3 it started to loose data and my graphs have holes like this:


red = while running zabbix-server 2.2.3
green = after rollback to zabbix-server 2.2.2 (today)

I cannot debug CPU usage while those holes appear while using zabbix 2.2.3, because I cannot (obviously) get data via SNMP, and I don't have direct access to the router, BUT in the past I had problems with IPSec VPN on Mikrotik routers and cipher, caused by CPU usage, so reading posts about SNMP bulk in zabbix 2.2.3 I supposed this feature is stressing CPU too much to get all the data.

Any problem has been detected after rolling back to simple SNMP get as per version 2.2.2 .

I'll post this to ZBX-8185 too
Regards

[asaveljevs]

Sergio, as I already mentioned in ZBX-8185, your issue looks similar to ZBX-8191. If you could post some tcpdump between Zabbix and MikroTik, that would be great. Let's continue the discussion on the bug tracker.