SNMP OIDs, MIBs, and Templates.

[jluvs2ride]

I am trying to understand the relationship between MIBs and OIDs IOT create SNMP based Templates.

I've done an SNMPWalk to a network connected device and captured the output to a txt file. I have the MIB file generated by this device, but I do not understand how to relate the objects in the MIB file to the OIDs.

So, for example I can see "Fan Status" in the MIB but I do not understand how to relate this to the appropriate OID.

Is there a tool, or a table that facilitates this? If so, can you describe how it is used?

Thanks.

[onallion]

You need to add the MIB to your MIB folder (in Centos it is /usr/share/snmp/mibs/). Once that's done, Snmpwalk will automatically use the mib to translate the OIDs.

Good luck

[jluvs2ride]

Thanks for your response.

Yeah, I've done that and captured the SNMPWalk output to a text file, but I'm just unclear as to how to interpret the results.

So if I want the fan speed for example, is there a way to determine which OID returns this value?

[onallion]

Well, a simple search for "fan" should get you started

[jluvs2ride]

Well, a simple search for "fan" should get you started

OK, I can find fan in the MIB, but not in the SNMPWalk. How do I get the OID from the MIB?

[onallion]

When you have the MIB in the proper folder and you snmpwalk, the result should be "translated". So you are supposed to be able to find "fan" there, unless something is wrong.

So for example here's my Snmpwalk for a device I have the MIB for:

IP-FORWARD-MIB::ipCidrRouteDest.0.0.0.0.0.0.0.0.0.

As you can see the OID is automatically translated. You don't need to know the actual OID, you can use the MIB in Zabbix. If you want the OID for some reason, you can use snmptranslate.

[jluvs2ride]

When you have the MIB in the proper folder and you snmpwalk, the result should be "translated". So you are supposed to be able to find "fan" there, unless something is wrong.

So for example here's my Snmpwalk for a device I have the MIB for:

IP-FORWARD-MIB::ipCidrRouteDest.0.0.0.0.0.0.0.0.0.

As you can see the OID is automatically translated. You don't need to know the actual OID, you can use the MIB in Zabbix. If you want the OID for some reason, you can use snmptranslate.

So, having the MIB file in the proper folder translates the OID to IP-FORWARD-MIB::ipCidrRouteDest.0.0.0.0.0.0.0.0.0.?

I suppose I need to find some training on SNMP.

One of the devices I want to monitor is a My Cloud EX2. I downloaded the MIB file and added it to directory. I found a program that loads the MB file and makes it a little clearer and gives you the OID, but all the OIDs I try give me errors. I'm assuming the MIB file is outdated and no one bothered to update it.

[onallion]

Possibly. If possible, always download the MIBs from the device itself (sometimes they are stored in a folder in the device's filesystem) or from the official website.

EDIT: Also, after adding new MIBS to the folder, always restart Zabbix Server/Proxy or it won't work

[jluvs2ride]

Thanks for your ongoing help with this.

Possibly. If possible, always download the MIBs from the device itself (sometimes they are stored in a folder in the device's filesystem) or from the official website.

EDIT: Also, after adding new MIBS to the folder, always restart Zabbix Server/Proxy or it won't work

Well, I did download the MIB directly from the device. I'll try again later after restarting the server, but I'm getting the error at the command line using the snmpget command that the OID is unrecognized.

[jluvs2ride]

Bizarre!

OK, now for some reason when I do an snmpwalk on my devices there is no human readable information in the OIDs.

It appears that something I have done has broken my snmp configuration.

[polpan]

Hi all, noob here, sorry, but does doing the snmpwalk will give me a filename .MIB?
thanks