CMK version: 2.0.0p17 CRE OS version: CentOS 7 Error message: [agent] Version: 1.2.6p12, OS: linux, [snmp] Cannot fetch system description OID .1.3.6.1.2.1.1.1.0. Please check your SNMP configuration. Possible reason might be: Wrong credentials, wrong SNMP version, Firewall rules, etc.CRIT , execu…

Please post the top section of the output from cmk -D HOSTNAME.

Addresses: SOMEIP Tags: [Autodiscovery:NO], [address_family:ip-v4-only], [agent:all-agents], [criticality:prod], [hostgroups:non-hostgroup], [ip-v4:ip-v4], [networking:lan], [piggyback:auto-piggyback], [servicegroups:non-servicegroup], [site:housing], [snmp:snmp], [snm…

For the love of Cthulhu! Use code blocks, I beg you! :pray:

[image] JanHalek: Type of agent: TCP: SOMEIP:6556 SNMP (Community: ‘SECRET’, Bulk walk: no, Port: 161, Backend: Classic) There is still SNMP configured. Have you activated your changes?

Yes, I have :slight_smile: Thank you, Jan

Anyone with recommendations? :slight_smile:

I think i see the problem. , [snmp:snmp], [snmp_ds:no-snmp], [tcp:tcp] SNMP host should look like this for example , [snmp:snmp], [snmp_ds:snmp-v2] agent host has this tags , [snmp_ds:no-snmp], [tcp:tcp] In your case the extra [snmp:snmp] leads to the SNMP calls. Now the why. I think that in …