New zabbix server getting SNMP errors

[Preston Taylor]

I migrated to a new zabbix server(5.0 to 6.0) by copying the database. After migration I've had this issue where random sets of SNMP items show this noSuchName error BUT they do not show it consistently, after every interval a new random set of items will have the error and other items will recover. These are all custom OIDS you won't find in any publicly available MIB but I can run 100+ SNMPGETs of these OIDs from my proxy without a single error and a pcap doesn't seem to show any errors in the polling either. Do I need to import MIB files? Other threads say no and it wouldn't make sense because they work *sometimes*. Any help at all would be appreciated, been troubleshooting this one for a while.

There are no correlating errors in proxy logs and in the server logs I see this

item "itemname" became not supported: SNMP error: (noSuchName) There is no such variable name in this MIB.

[LenR]

Try increasing your timeout value on the proxy. (What is it?) If they work sometimes, it shouldn't be a problem with the mibs file.

[Preston Taylor]

It was 5 seconds (Default?) I increased it to 30 on both server and proxy (and restarted both of course) and it hasn't appeared to make any difference. Still getting the error about the same amount. pcaps on the proxy show SNMP replies coming in <1ms.

[Preston Taylor]

So I disabled Bulk requests and that appears to have resolved it but for all the wrong reasons, I think there is an issue with the bulk processing. It seems as though if a single OID returns an error the entire bulk request is considered errored. I was able to locate a get-response in a pcap that showed the error but it only shows the error for a single OID out of 11 but ALL of them are marked as noSuchName in zabbix. Definitely incorrect behavior.

the old server (5.0) used bulk requests and did NOT have this problem. Is there a setting I can tweak somewhere for this or is this a change in code?

[idanam7761]

hey, i have the same issue. have you found a solution yet?