Question

Problem With Querying SNMP Server

Asked by: shakoush2001

Hi
I am trying to query a server for CPU snmp info.

snmpwalk -Dparse-mibs -c xxxxxx -v 2c xxxxxxxxxx .1.3.6.1.2.1.25.3.3.1


HOST-RESOURCES-MIB::hrProcessorEntry = No Such Object available on this agent at this OID


Anything that needs to be done on the target server ?

The target server is CentOS

Thanks

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Asked On
2009-02-11 at 01:40:35ID24132616
Topics

Linux Networking

,

Unix Operating Systems

,

Unix Networking

Participating Experts
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Comments
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Answers

 

by: shakoush2001Posted on 2009-02-11 at 03:32:44ID: 23610154

If do the snmpwalk on the same server I get:

[root@localhost src]# snmpwalk  -c public -v 2c xx.yy.zz.ss .1.3.6.1.2.1.25.3.3.1
HOST-RESOURCES-MIB::hrProcessorFrwID.768 = OID: SNMPv2-SMI::zeroDotZero
HOST-RESOURCES-MIB::hrProcessorFrwID.769 = OID: SNMPv2-SMI::zeroDotZero
HOST-RESOURCES-MIB::hrProcessorFrwID.770 = OID: SNMPv2-SMI::zeroDotZero
HOST-RESOURCES-MIB::hrProcessorFrwID.771 = OID: SNMPv2-SMI::zeroDotZero

 

by: gheistPosted on 2009-02-11 at 14:05:51ID: 23616988

Firsthand verify access lists in server's snmpd.conf
If they seem OK then it seems you have firewall blocking UDP in the middle.

 

by: shakoush2001Posted on 2009-02-22 at 23:19:36ID: 23708801

It turned out to be a bug in the latest version of snmp on centos 5.3.2, I had to download from source ..patch and install form source

 

by: gheistPosted on 2009-02-23 at 05:57:16ID: 23711103

You can install real version via "yum update". If it is not there - ask upstream for a fix.
Compiling is really last effort.

 

by: shakoush2001Posted on 2009-02-24 at 04:43:14ID: 23720782

Well, it is a known bug but there is no update not even in testing. For this particular bug on CenTOS

 

by: gheistPosted on 2009-02-27 at 01:52:20ID: 23754079

I could not find reference to bug you appeal to

 

by: shakoush2001Posted on 2009-02-27 at 01:52:55ID: 23754083

Just a min let me dig it out

 

by: shakoush2001Posted on 2009-02-27 at 01:55:23ID: 23754102

 

by: shakoush2001Posted on 2009-02-27 at 01:58:11ID: 23754120

 

by: gheistPosted on 2009-02-27 at 01:59:40ID: 23754126

Both fixes are not related to problem you encountered.

 

by: shakoush2001Posted on 2009-02-27 at 02:01:28ID: 23754138

 

by: shakoush2001Posted on 2009-02-27 at 02:04:18ID: 23754152

CHeck out it clearly states that it fixes the problem that CPU is not shown in snmp data :S




Description of problem:

RHEL 4 servers are correctly replying to the SNMP variable request
HOST-RESOURCES-MIB::hrProcessorLoad

The rpm is net-snmp-5.1.2-11.EL4.10

But for some reason RHEL 5 boxes are not displaying that variable

The rpms are

net-snmp-5.3.1-14.0.1.el5
net-snmp-libs-5.3.1-14.0.1.el5

How reproducible:
On a RHEL 5 system
# snmpwalk -c public -v 2c localhost HOST-RESOURCES-MIB::hrProcessorLoad
returns nothing.




Created an attachment (id=294204) [details]


this should do the trick



 

by: shakoush2001Posted on 2009-02-27 at 02:05:08ID: 23754159

Any other doubts ?

 

by: gheistPosted on 2009-02-27 at 02:09:13ID: 23754176

That's it, thank you for explanation.

20120131-EE-VQP-002

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