Using net-snmp with custom MIB.

larold · 10-13-2010, 04:13 PM

Here is what I am trying to do, and the problem I am having.

Blackberry Enterprise Server (BES) 5.0.2 was recently installed at our site. They asked me, the Linux and "monitoring" guy, to "monitor" it.

So I pulled down the MIB file from the Blackberry folks (They're called Resarch In Motion, FYI). Also, the SNMP server component of BES was enabled and configured by the Windows / Blackberry admins.

I can successfully use snmpget and snmpwalk to retrieve values from our BES server. Excellent.

The bad news is that I am not getting very useful descriptions of the OIDs being returned. Let me show you the difference in output when I do vs. when I don't use the -M and -m options:

Without vendor-specific MIB:
# snmpwalk -c COMMUNITY -v 2c SERVER 1.3.6.1.4.1.3530 -Of |head -4
.iso.org.dod.internet.private.enterprises.3530.5.1.0 = INTEGER: 5
.iso.org.dod.internet.private.enterprises.3530.5.2.0 = INTEGER: 0
.iso.org.dod.internet.private.enterprises.3530.5.3.0 = INTEGER: 16682
.iso.org.dod.internet.private.enterprises.3530.5.4.0 = INTEGER: 350608

WITH vendor-specific MIB:
# snmpwalk -M +./mibs -m +BLACKBERRYSERVERMIB-SMIV2 -c COMMUNITY -v 2c SERVER 1.3.6.1.4.1.3530 -Of |head -4
.iso.org.dod.internet.private.enterprises.rim.5.1.0 = INTEGER: 5
.iso.org.dod.internet.private.enterprises.rim.5.2.0 = INTEGER: 0
.iso.org.dod.internet.private.enterprises.rim.5.3.0 = INTEGER: 16682
.iso.org.dod.internet.private.enterprises.rim.5.4.0 = INTEGER: 350608

My question is this:

How do I get more of the numerical OID replaced with useful, descriptive text? I don't want to see 'rim.5.4.0', I want to see 'rim.something.text.moretext.evenmoretext'

I'm not super familiar with net-snmp so I'm not sure which of the following are valid:

- Learn about MIB formats in the RFC and manually dig through the 31,000+ entries to find things that could be useful
- Contact the vendor. Something is wrong with the MIB file
- Change the syntax of the command - it is not being invoked correctly to convert the entire OID to text.
- Something else I haven't thought of?

Thanks!!!

sem007 · 10-14-2010, 06:00 AM

Quote:

Originally Posted by larold

My question is this:

How do I get more of the numerical OID replaced with useful, descriptive text? I don't want to see 'rim.5.4.0', I want to see 'rim.something.text.moretext.evenmoretext'

Thanks!!!

It is depend on how you MIB developed.You can see description(text) if defined in MIB.

i.e

Code:

snmpwalk -v2c -c public Test-HOST hrMemory -Of
.iso.org.dod.internet.mgmt.mib-2.host.hrStorage.hrMemorySize.0 = INTEGER: 2096584 KBytes

if you want to see numeric value

Code:

 snmpwalk -v2c -c public Test-HOST hrMemory -On
.1.3.6.1.2.1.25.2.2.0 = INTEGER: 2096584 KBytes

let us know if you have any doubts
Regards,

larold · 10-14-2010, 10:23 AM

Quote:

Originally Posted by sem007

It is depend on how you MIB developed.You can see description(text) if defined in MIB.

i.e

Code:

snmpwalk -v2c -c public Test-HOST hrMemory -Of
.iso.org.dod.internet.mgmt.mib-2.host.hrStorage.hrMemorySize.0 = INTEGER: 2096584 KBytes

if you want to see numeric value

Code:

 snmpwalk -v2c -c public Test-HOST hrMemory -On
.1.3.6.1.2.1.25.2.2.0 = INTEGER: 2096584 KBytes

let us know if you have any doubts
Regards,

As you can see, I already included a -Of flag, and a portion of the OID still appears as numeric. Does this indicate a likely deficiency in the MIB file?

sem007 · 10-15-2010, 05:02 AM

Quote:

Originally Posted by larold

As you can see, I already included a -Of flag, and a portion of the OID still appears as numeric. Does this indicate a likely deficiency in the MIB file?

yes, it depend on MIBs.

In default snmpwalk command you can see result with numbers and text.
As i am trailing i am not able to paste examples.But you can verify snmpwalk result

Code:

snmpwalk -v2c -c community ip_address

Regards,