Created snmp item don't work

[starapartment]

Hi all ,
I'm new and noob in the world Zabbix.

[starapartment]

Sorry ,miss some contents , list full contents as below
Hi all ,
I'm new and noob in the world Zabbix.
I want monitor device and server through snmp .
But I can't find CPU system, user,idle usage in default item .
I try to add item in "Template OS Linux SNMPv2" , it didn't collect any data .
Have any one encounter or resole the question ?

[Atsushi]

Did you set snmpd so that OS value can be obtained from snmpd?

Open the list of items on the host and if there is a red mark on the far right, move the mouse pointer to that mark and check the message.
Please also check the log of Zabbix server.

[starapartment]

Hi Atsushi,
Thanks for your answer .
The target host snmp configure shoulde be fine and discover rule work.(please refer attach file last value of target.png)
item of configuration.host list the error 'No Such Instance currently exists at this OID'
(please refer attach file item error.png,item setting.png and oid check.png)
zabbix server log also show the error . (please refer attach file zabbix server log.png)

[Atsushi]

Try using the snmpget command.
Does it look like the following?

$ snmpget -v2c -c public localhost 1.3.6.1.4.1.2021.11.9
UCD-SNMP-MIB::ssCpuUser = No Such Instance currently exists at this OID
$

Please properly designate the OID until the end.

$ snmpget -v2c -c public localhost 1.3.6.1.4.1.2021.11.9.0
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 0
$

[starapartment]

Hi Atsushi,
Thanks for your support .
The value can get normal after designate 0 at end .