monitor Cisco CPU utilisation with SNMP

[ramil85]

i've activated SNMP protocol on cisco switch. And from cisco site i found object id for cpu:
http://www.cisco.com/c/en/us/support/do ... -snmp.html

from my linux i can receive below results

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ramil@HP:~$ snmpwalk -v2c -c public 172.16.110.1 .1.3.6.1.4.1.9.9.109.1.1.1.1.5
SNMPv2-SMI::enterprises.9.9.109.1.1.1.1.5.1 = Gauge32: 0

but when i try to monitor it from nagios 3.x web
with configurations in /etc/nagios/objects/switch.cfg

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define service{
    use   generic-service
    host_name switch1
    service_description       5 min CPU Average
    check_command           check_snmp!-C public -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5
}

i cant see anything on web interface.
Could you help me with this configuration?!

Thanks in advance.

[jdalrymple]

When you say

i cant see anything on web interface.

Do you mean you can't see the service showing up at all, or do you mean that the service shows up but there is no data returning from the service check?

If the former, have you reloaded the Nagios config?

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/etc/init.d/nagios reload

If the latter, can you post the results you do get back? There should be an error included.

[ramil85]

Do you mean you can't see the service showing up at all, or do you mean that the service shows up but there is no data returning from the service check?

i mean it shows up but there is no data returning from the service check.

If the former, have you reloaded the Nagios config?

i restart it

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/etc/init.d/nagios restart

If the latter, can you post the results you do get back? There should be an error included.

yes

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External command error. Timeout: No Response from 172.16.110.1:161

but this switch is available. PING on web interface is green.

[jdalrymple]

Looks good,

I guess to troubleshoot it further we should make sure it runs properly when executed from the command line using the check_snmp plugin instead of snmpwalk:

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/usr/lib64/nagios/plugins/check_snmp -H 172.16.110.1 -C public -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5

If that doesn't work let's throw the version in:

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/usr/lib64/nagios/plugins/check_snmp -H 172.16.110.1 -C public -P 2c -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5

For reference it looks like you have a yum package of Nagios so I adjusted the plugins path using best guess, check_snmp may actually be located somewhere besides where I specified.

Let us know if that helps.

[ramil85]

I guess to troubleshoot it further we should make sure it runs properly when executed from the command line using the check_snmp plugin instead of snmpwalk:

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/usr/lib64/nagios/plugins/check_snmp -H 172.16.110.1 -C public -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5

this command return:

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External command error: Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.

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/usr/lib64/nagios/plugins/check_snmp -H 172.16.110.1 -C public -P 2c -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5

this command return:

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SNMP OK - = No Such Instatnce currently exists at this OID

[jdalrymple]

OOoops, sorry I didn't tranaslate the walk output to a proper get. Change your service definition to the following - note the additional ".1" at the end of check_command. I bet that fixes it.

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define service{
    use   generic-service
    host_name switch1
    service_description       5 min CPU Average
    check_command           check_snmp!-C public -o .1.3.6.1.4.1.9.9.109.1.1.1.1.5.1
}

[ramil85]

Thanks.
it works now.