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SNMP query usbflash


I just searched hours for the solution of my problem, but couldn't find any good solution.

My goal:

I want to get the installed IOS version from a router via SNMP query. So I execute a .php script on a server, which has the privileges to send a SNMP query to the routers. I have 170 devices that have to be checked.

My problem:

In 150 of 170 cases the SNMP query returns the IOS file e.g. "c870-advsecurityk9-mz.124-15.T15.bin". I used the OID "", which represents the OID for ciscoFlashFileName. But in 20 of 170 cases it returns "

No Such Object available on this agent at this OID". In my oppinion the reason for this error message is that the IOS file is not saved in flash:, but in usbflash0:. The problem appeared just on Cisco 1921 routers.

My question:

Is there any possibility to get the installed IOS image via SNMP query from the usbflash?

I hope that you can understand my problem and my goal. If you don't, feel free to ask me for more information.

Kind regards,

Daniel Schmalen | regio iT

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