SNMP setup

thanks for the the response that1guy15. Your explanations make light of alot of reading.

Further clarification if you can do so.
"Each component or value with in a mib is called a OID. they are given a specific SNMP address and name so that snmp capable devices can collect this info."

I have downloaded and installed the MIBs from CISCO. Theses are alot of ".my" files. Are these files MIBs for a specific device or collectively a list of all of the potential OIDs for every device and its possible monitorable attributes? Specifically, do I need to load all of these or a specific file depending on the device or what I want to monitor, e.g. switch, router or interface, cpu utilization.

I hope this makes sense.

that1guy15,

Good article. The "SNMP TRAPS" section made more clear some items I saw in the NMS today.

Cool! im glade that helped clear up some stuff. If your ? was answered dont forget to close it out and assign points.
Have a good new years!

that1guy15,

Please see the additional question from above...

"Each component or value with in a mib is called a OID. they are given a specific SNMP address and name so that snmp capable devices can collect this info."

I have downloaded and installed the MIBs from CISCO. Theses are alot of ".my" files. Are these files MIBs for a specific device or collectively a list of all of the potential OIDs for every device and its possible monitorable attributes? Specifically, do I need to load all of these or a specific file depending on the device or what I want to monitor, e.g. switch, router or interface, cpu utilization.

I hope this makes sense. Thank you for the help.

Sorry i did not see your first comment only the second...
Yeah! Cisco has a ton of mibs. the are split up by feature and service being used for SNMP. This is just an example but BGP OIDs would be under one mib and VoIP OIDs would be under another MIB. So if you wanted to monitor both then you would need the two MIBs that relate to those OIDs.
You might have already stumbled across this site but the Cisco SNMP object Navigator is a great tool to figure out what mibs have each feature.
http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en
Also here is a good read on using MIB browsers to dig into MIBs. Using a MIB browser helps you determine what all OIDs a MIB has inside. If you are going to be working closley with SNMP then you will need to know how to use this tool. This article goes a little bit indepth but it gives the general point.
 http://www.unleashnetworks.com/resources/articles/88-how-to-effectively-use-a-mib-browser.html

Also here is a good starting off point for Cisco MIBs
http://tools.cisco.com/ITDIT/MIBS/servlet/index 

Thank you that1guy15.

Although I have stumbeled across the object Navigator from CISCO, it never hurts to mention it as you have done. So thank you for pointing it out.

The second link is quite helpful, great catch.
"A MIB Module is just a file that contains definitions of related MIB objects"..."A plain MIB file looks like the image on the right."
Is their a standard file extension for the MIB modules, e.g. ".my or txt". I realize they are in the SMI format, but did'nt know if the extension mattered to the NMS or browser or if it was standard?

Thanks.

 

Thank you that1guy15, I did miss this link.
http://tools.cisco.com/ITDIT/MIBS/servlet/index

If you can clarify the previos question then I will close-out the question and assign the points to you.

All mibs i have seen have a file extention of .mib. I have worked with several Linux NMS systems that will accept MIBs withoug an extension but for the most part they always have .mib

Thanks and Happy New Years to you too!