Would love some ideas on how to monitor switch port duplex

[logic_bomb421]

So like the title says, I'm trying to monitor switch port duplex mode. I figured this would be doable using SNMP, however, what I didn't take into account were the older switches we need to monitor duplex on. Currently we're trying to monitor 3COM 4200G 48-port switches. The do appear to support SNMP, but whenever I reference most OIDs, I get errors. We'll take the default port monitoring command/service that comes with Nagios 4.0.7. Right now, I have configured:

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define command{
     command_name   check_snmp
     command_line   $USER1$/check_snmp -H $HOSTADDRESS$ $ARG1$ $ARG2$ $ARG3$ $ARG4$
     }

and

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define service{
     use                   generic-service
     host_name             NAME OF SWITCH
     service_description   Port 1 Link Status
     check_command         check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB
     }

What this returns in Nagios is really confusing:

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External command error: MIB search path: $HOME/.snmp/mibs:/usr/share/mibs/site:/usr/share/snmp/mibs:/usr/share/mibs/iana:/usr/share/mibs/ietf:/usr/share/mibs/netsnmp
Cannot find module (SNMPv2-SMI): At line 0 in (none)
ifOperStatus.1: Unknown Object Identifier (Sub-id not found: (top) -> ifOperStatus)

Has anyone seen this before?

Also, if someone knows of a better way to monitor port duplex, I'm all ears. I was hoping 3COM copied Cisco (Cisco has a portDuplex OID), but, alas, they did not.

Thank you!

[tmcdonald]

It looks like your SNMPv2-SMI MIB is missing. Please run the following command and post the output:

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find / -name SNMPv2-SMI.txt

[logic_bomb421]

Alright, when I run

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find / -name SNMPv2-SMI.txt

my terminal lags for a second like it's thinking and then returns nothing and gives me the root::/# cursor.

[tmcdonald]

Yea, looks like you probably have no MIBs at all. Try running the following:

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yum install -y net-snmp-utils

I believe this should give you the standard MIBs, located by default in /usr/share/snmp/mibs/.

[logic_bomb421]

So neither the yum or apt-get commands found anything for net-snmp-utils, however I did manage to find http://www.net-snmp.org/, and I downloaded and installed the latest LTS version. Now the find command returns /net-snmp-5.7.2.1/mibs/SNMPv2-SMI.txt.

[tmcdonald]

Try placing /net-snmp-5.7.2.1/mibs/SNMPv2-SMI.txt into /usr/share/snmp/mibs/ so it's in the default path the system will look for MIBs.

[logic_bomb421]

Okay, after moving my SNMPv2 text file to the directory you specified, Nagios is now returning the unknown status error:

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External command error: ifOperStatus.1: Unknown Object Identifier (Sub-id not found: (top) -> ifOperStatus) 

[tmcdonald]

Go ahead and copy over all of the MIBs from /net-snmp-5.7.2.1/mibs/ to /usr/share/snmp/mibs/ since it seems the one I had you move originally relies on some others.