Dealing with SNMP MIBS dependencies

[Marcel Pineda]

Hello all,

I am trying to load SNMP MIB files from Brocade, because I want to receive SNMP traps from those devices and by loading the MIB files, events will be properly formatted.

Vendor provides a package with 10 .mib files, and there are dependencies between them. 

https://techdocs.broadcom.com/us/en/fibre-channel-networking/fabric-os/fabric-os-mib/9-1-x/understan...

I went into 'MID Server > SNMP MIBs' and created 10 entries, one for each .mib file. Then I restarted MID server.

When I check MID server logs, I see errors like this:

2023-11-27 12:22:23 WARN (MIB Initializer) [SNMP_MIBs:85] MIB loader errors when loading MIB: BROCADE-MAPS-MIB
---line 22, column 10: couldn't find referenced MIB 'SW-MIB'

---line 293, column 3: undefined symbol 'swVfId'
---line 314, column 3: undefined symbol 'swVfId'

What is the best option to deal with these dependencies and ensure that MID server will load the MIB files in the right order?

Thanks in advance.

[Radhika Aluru]

Hello Marcel,

Please try to load one MIB file at a time rather than loading all the MIB files once. Try to find the independent mib file and start with that one and move on the dependent mib files.

[Marcel Pineda]

Hello Radhika, 

You mean that if I upload to SNMP MIBs in the right order, when the MID server gets restarted it will read the files based in that creation order?

Or do I have to load 1 MIB, restart MID server and then load the next one? I do not think this would work because when I move the group of SNMP MIBs from one SN instance to another (via Update Set), this won't be possible.

Thank you

[DaveHertel]

Due to the error, you need to also load MIBs that are missing (i.e. referenced from other MIBS).  In this case SW-MIB

Note the error line:   couldn't find referenced MIB 'SW-MIB'

All MIB dependencies must be loaded too.. which is painful but required.  You have to look at MID startup logs to find these error/dependencies, then add those missing MIBS... restart the mid... try again looking at logs..etc.

Hope this helps..

[Marcel Pineda]

Hi Dave, issue is that there is no way to inform to the MID server the order to load the MIB files. So I suppose it is done in alphabetical order, maybe? This does not mean it is the right order based on dependencies.
I tried adding all the 10 MIB files I had (main file and dependencies) at once, but then I saw in the logs that there were some errors due to the wrong loading order but there is no way to change this, as far as I know.