Hey,

I run Linux VM with net-snmp on it

here is the output of custom variable that I have added

[root@linxuph53 ~]# snmpwalk -v 1 127.0.0.1 -c public .1.3.6.1.4.1.2021.8

UCD-SNMP-MIB::extIndex.1 = INTEGER: 1
UCD-SNMP-MIB::extNames.1 = STRING: sessionsweb
UCD-SNMP-MIB::extCommand.1 = STRING: /bin/sh
UCD-SNMP-MIB::extResult.1 = INTEGER: 0
UCD-SNMP-MIB::extOutput.1 = STRING: 70
UCD-SNMP-MIB::extErrFix.1 = INTEGER: noError(0)
UCD-SNMP-MIB::extErrFixCmd.1 = STRING:

this is the value that interest me:
UCD-SNMP-MIB::extOutput.1 = STRING: 70

however when I try to create a custom SNMP Sensor adding this line: 1.3.6.1.4.1.2021.8 in OID value in settings I'm getting this error

No Such Name (SNMP error # 2)

any ideas?

thanks, Dmitry

Article Comments

Hello,

does the OID work in our SNMP Tester? If not, does it if you add a .1 to it?

best regards.


Feb, 2012 - Permalink

Yes, I tested it with SNMP Tester and got the same message - 

----------------------- New Test -----------------------
Paessler SNMP Tester 3.2
Device: 192.168.2.25

2/9/2012 4:32:05 PM (13 ms) : Start using SNMP V1
2/9/2012 4:32:05 PM (19 ms) : -------
2/9/2012 4:32:05 PM (22 ms) : Value: No Such Name (SNMP error # 2)
2/9/2012 4:32:05 PM (26 ms) : Done

I also added .1 to the end and it didn't help, however if I query from any Linux machine

snmpwalk -v 1 <IP> -c public .1.3.6.1.4.1.2021.8

does give me output

UCD-SNMP-MIB::extIndex.1 = INTEGER: 1
UCD-SNMP-MIB::extNames.1 = STRING: sessionsweb
UCD-SNMP-MIB::extCommand.1 = STRING: /bin/sh
UCD-SNMP-MIB::extResult.1 = INTEGER: 0
UCD-SNMP-MIB::extOutput.1 = STRING: 70
UCD-SNMP-MIB::extErrFix.1 = INTEGER: noError(0)
UCD-SNMP-MIB::extErrFixCmd.1 = STRING:

this is in my config list

# Make at least  snmpwalk -v 1 localhost -c public system fast again.
# name           incl/excl     subtree         mask(optional)
#view    systemview    included   .1.3.6.1.2.1.1
#view    systemview    included   .1.3.6.1.2.1.25.1.1
view     systemview    included   .1

maybe I need expose 1.3.6.1.4.1.2021.8 here in a VIEW here?


Feb, 2012 - Permalink

.1.3.6.1.4.1.2021.8 is only the base OID (basically a table OID). You need the oids of the counters below:

 extTable	1.3.6.1.4.1.2021.8
 extEntry	1.3.6.1.4.1.2021.8.1
 extIndex	1.3.6.1.4.1.2021.8.1.1
 extResult	1.3.6.1.4.1.2021.8.1.100
 extOutput	1.3.6.1.4.1.2021.8.1.101
 extErrFix	1.3.6.1.4.1.2021.8.1.102
 extErrFixCmd	1.3.6.1.4.1.2021.8.1.103
 extNames	1.3.6.1.4.1.2021.8.1.2
 extCommand	1.3.6.1.4.1.2021.8.1.3

From http://www.oidview.com/mibs/2021/UCD-SNMP-MIB.html

Please try those individual OIDs


Feb, 2012 - Permalink

It does work on my Linux machine

[root@linxuph53]# snmpwalk -v 1 localhost -c public .1.3.6.1.4.1.2021.8.1.101 UCD-SNMP-MIB::extOutput.1 = STRING: 210

but it doesn't work on SNMPTester, I tried all the OIDs you mentioned - and got the same error, system doesn't see it.

What else can I do? From any Linux machine in network, I can query the SNMP tree 2021.8 without any issues but SNMPTester - says

/10/2012 12:17:05 PM (22 ms) : Value: 2 (No Such Name (SNMP error # 2))


Feb, 2012 - Permalink

Maybe it's blocked then from PRTG/the Tester.


Feb, 2012 - Permalink