Cold Standby SNMP

[dslaughter]

I have setup a cold standby server and restored from backup. One of the mibs that is installed is not working. I see the mib in Admin->Manage MIBs and the mib does exists in /usr/share/snmp/mibs. When I run the snmp command I get

/usr/local/nagios/libexec/check_snmp -v -H x.x.x.x -p 161 -o ENTITY-SENSOR-MIB::entPhySensorValue.100006001 -C <community> -P 2c -w 450 -c 500
/bin/snmpget -Le -t 3 -r 5 -m ALL -v 2c [context] [authpriv] x.x.x.x:161 ENTITY-SENSOR-MIB::entPhySensorValue.100006001
External command error: MIB search path: /root/.snmp/mibs:/usr/share/snmp/mibs
Cannot find module (ENTITY-SENSOR-MIB): At line 0 in (none)
ENTITY-SENSOR-MIB::entPhySensorValue.100006001: Unknown Object Identifier

Is there configuration outside of nagiosxi I need to do after the initial restore?

[ssax]

It should work if the mib is there, is that check failing if you run it from the CLI through an SSH session?

What is the output of this command?

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grep 'ENTITY-SENSOR-MIB DEF' /usr/share/snmp/mibs/*

What the permissions on the mib file?

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ls -l /usr/share/snmp/mibs/themibfile.ext

[dslaughter]

The output I posted is from an ssh session.

Here is the grep output.

[root@z2-nms-1 mibs]# grep -r 'ENTITY-SENSOR-MIB DEF' /usr/share/snmp/mibs/*
/usr/share/snmp/mibs/ARISTA-ENTITY-SENSOR-MIB.txt:ARISTA-ENTITY-SENSOR-MIB DEFINITIONS ::= BEGIN
/usr/share/snmp/mibs/ENTITY-SENSOR-MIB.mib:ENTITY-SENSOR-MIB DEFINITIONS ::= BEGIN
[root@z2-nms-1 mibs]#

Here is the permissions for the mib file.

[root@z2-nms-1 mibs]# ls -l /usr/share/snmp/mibs/ENTITY-SENSOR-MIB.mib
-rw-rw-r-- 1 root nagios 16710 Feb 17 16:22 /usr/share/snmp/mibs/ENTITY-SENSOR-MIB.mib
[root@z2-nms-1 mibs]#

[ssax]

Does this work?

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/usr/local/nagios/libexec/check_snmp -v -H x.x.x.x -p 161 -o ENTITY-SENSOR-MIB::entPhySensorValue.100006001 -C <community> -P 2c -w 450 -c 500 -m ENTITY-SENSOR-MIB

I downloaded to my system and then tested and it finds it properly.

I know it sounds dumb, but try doing this:

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service snmpd restart
service snmptrapd restart
snmpwalk -v 2c -c 'yourcommunity' 192.168.X.X:161 -m ENTITY-SENSOR-MIB ENTITY-SENSOR-MIB::entPhySensorValue.100006001

There is a mib index file that may not be updated and I think one of those will update it.

Then try the command again:

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/usr/local/nagios/libexec/check_snmp -v -H x.x.x.x -p 161 -o ENTITY-SENSOR-MIB::entPhySensorValue.100006001 -C <community> -P 2c -w 450 -c 500

[dslaughter]

Thank you for your assistance.

Still got the same results from the commands you sent.

This is a standby server that was restored using the production server backup. The check does work correctly on production. I think I missed something in snmp setup but cannot find it. Everything I have tried hasn't worked.

[dslaughter]

I forgot to mention the new standby is a clean install of centos7 and then did a restore using the backup file produced by nagiosxi in the local backup archives.

[benjaminsmith]

HI,

I forgot to mention the new standby is a clean install of centos7 and then did a restore using the backup file produced by nagiosxi in the local backup archives.

Honestly, not sure why this is not working for you. I'm going to reach out to a few Sean and the rest of the team and follow up shortly with you.

Best Regards,
Benjamin

[benjaminsmith]

Hi,

After discussing this with the team, we feel it would be best to open a ticket for the issue and we'll get a remote session setup to debug this further.

To open a support ticket, go to:
https://support.nagios.com/tickets/

and reference this post.

Thanks!
Benjamin