Some data sources return 0 from snmp[SOLVED]

[pompompom]

I have installed and configured cacti successfully.
Only one problem: I cannot get network statistics and disk partitions form snmp
Cacti said..

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Total: 0.020000, Delta: 0.020000, Executing SNMP get for num of indexes @ '.1.3.6.1.2.1.2.1.0' Index Count:
Total: 0.020000, Delta: 0.000000, Executing SNMP walk for list of indexes @ '.1.3.6.1.2.1.2.2.1.1' Index Count: 0
Total: 0.020000, Delta: 0.000000, No SNMP data returned

snmpwalk works fine

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snmpwalk -v3 -l authPriv -u myuser -a SHA512 -A "password" -x AES -X "password" cacti1.server  IF-MIB::ifDescr.2
IF-MIB::ifDescr.2 = STRING: eth0

System is Debian 11, both server and monitored client

[TheWitness]

Don't use the snmpd.conf strait from the distro. As a beginner, just use a one line snmpd.conf "ro public", then restart snmpd. That'll get you SNMP v2 access.

[pompompom]

Don't use the snmpd.conf strait from the distro. As a beginner, just use a one line snmpd.conf "ro public", then restart snmpd. That'll get you SNMP v2 access.

Thanks, but for security reason I prefer snmpv3.

I have tried using snmpv2 and...

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Total: 0.000000, Delta: 0.000000, Found data query XML file at '/usr/share/cacti/site/resource/snmp_queries/interface.xml'
Total: 0.000000, Delta: 0.000000, Running Data Query [4].
Total: 0.000000, Delta: 0.000000, Found Type = '3' [SNMP Query].
Total: 0.000000, Delta: 0.000000, XML file parsed ok.
Total: 2.510000, Delta: 2.500000, Executing SNMP get for num of indexes @ '.1.3.6.1.2.1.2.1.0' Index Count:
Total: 5.010000, Delta: 2.500000, Executing SNMP walk for list of indexes @ '.1.3.6.1.2.1.2.2.1.1' Index Count: 0
Total: 5.010000, Delta: 0.000000, No SNMP data returned

[pompompom]

I notice that using snmpv3 the oid is different

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snmpwalk -v3 -l authPriv -u myuser -a SHA512 -A "pass" -x AES -X "pass" cacti1 iso.3.6.1.2.1.31.1.1.1.1.2
iso.3.6.1.2.1.31.1.1.1.1.2 = STRING: "eth0"

I have tried snmpwalk v2c with the oid searched by cacti

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snmpwalk -v2c -c public cacti1 -On 1.3.6.1.2.1.2.2.1.1

return..

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.1.3.6.1.2.1.2.2.1.1 = No Such Object available on this agent at this OID

I forgot one thing, the monitored machine are kvm/qemu vm.

[TheWitness]

You'll figure it out eventually.

[pompompom]

I have found a solution, but my post disappear.

[TheWitness]

Good.

[pompompom]

The solution was to use MD5 instead of SHA when I create the user with snmp.