SNMP Proxy Error/Problem

[mindef]

Hello,
i have a problem with a snmp proxy and Zabbix. The company i work for has several vpn firewalls in different country's in the world and we are monitoring them with Zabbix through a snmp proxy configured with a community.
We also have a trigger configured with the nodata expression.
The problem is, when a vpn firewall goes offline or for a test is powered off, in Zabbix we see at the items of this firewall the error: SNMP error [(genError) A general failure occured]
When i look at latest data the items that were configured are not displaying here anymore. The triggers configured for these items are gone also. When this happens Zabbix isn't registering this firewall as offline. Because Zabbix thinks there are no triggers and everything is well and online.
When we turn on the firewall again, the snmp error does not go away by itself. I have to re-activate the items again manually. The nodata trigger only works when we turn off the firewall and the snmp error is not occurring YET. Sometimes the snmp error appears after 10 mins, sometimes after 1 minute. After that, the items/triggers are gone in latest data like i said before.

This is ofcourse a no-go situation for us and very unreliable. How can we solve this and is it possible to solve this? Thank you very much in advance.
Regards,
Arno

[jimbob]

Hello Arno,


It seems that a genError makes the poller regard this as NOTSUPPORTED inspects the items.status beeing ITEM_STATUS_NOTSUPPORTED or not.

if ITEM_STATUS_NOTSUPPORTED:
update item
set nextcheck to CONFIG_REFRESH_NOTSUPPORTED + now()
set lastclock to now()
for the current item
else:
it updates the item to ITEM_STATUS_NOTSUPPORTED + set the genError message for this item.
then it checks the item for host_available if it's not available it updates the host to be available.


By the way what version of zabbix are you using?

And could you post the relevant zabbix log information for this item/host.


But I might be wrong I just spend a little time looking at zabbix, maybe an active developer could answer this.

What does zabbix_server do when it's poller check_snmp encounters snmp genError. And what consequences does this have for the item involved and the triggers created for this item.


HTH.

[jimbob]

seems like someone has found this to be a problem earlier

https://support.zabbix.com/browse/ZBX-1003

If I have anything to say about it the second option proposed would be preferable .supported(0) .supported(1).

regards