SNMP items stuck in error state

[IvanBayan]

Hello.
I applied template with SNMP checks to host, first i does not had correct MIB installed and items turns to 'Not supported'. I installed MIB, checked it with snmpget, restart zabbix, but items was in "Not supported" state. I deleted template from host and add it again, only after that items changed status to "Supported".
How i can tell zabbix to recheck items without delete/link template to host?
On dashboard i did not seen errors, even when items had "Not supported state", how i can control that all items linked to host is being checked? How i can configure zabbix to generate error if any items is not monitored?
PS
I used nagios before and not very familiar with zabbix, i tried to found answers in documentation but without result. Please suggest me documentation for first time.

[jan.garaj]

Unsupported items are rechecked automatically. See setting "Refresh unsupported items (in sec)"

https://www.zabbix.com/documentation/2.4/manual/web_interface/frontend_sections/administration/general

You can receive notification about unsupported items. Doc:

https://www.zabbix.com/documentation/2.4/manual/config/notifications/unsupported_item

[IvanBayan]

Thank you for you help. I found that problem was in snmp, i placed MIB in home directory and snmpget work fine, but zabbix still unable to resolve string OIDs to numerical and did not wrote about that in log. I tried to edit my post, but it was on premoderation.

Am i correctly understand, that zabbix proxy need snmp with configured MIBs too? Zabbix server send string OIDs instead of numerical to proxy?

[gleepwurp]

Hi Ivan,

you can actually use either the String OID or the numerical OID.

Although less obvious to determine what they mean, the numerical OIDs do not require the installation of MIBs anywhere, so you have less hassle in large environment.

Gleepwurp.

[IvanBayan]

I mean, that zabbix server theoretically can resolve string OIDs to numerical and send numerical OIDs to proxies.
Now if i want to use string OIDs i must download MIB's and configure snmp-utils on each proxy, not only on zabbix server.