Help in adding a new MIB - got confused

Hello all,

I'm going through a storm here!! I'm trying simply to add a new MIB to the
SNMP throughout the net-snmp. But, there are too many tutorials and help
docs specifying commands that I just got confused and lost.

I believe my problem is simple. But, as it is my first contact with SNMP it
turned to a huge problem to me!

Well, I'm developing a solution that needs to get the information about what
protocols the device (machine) is able to run. I found in the Internet the
CISCO-NBAR-PROTOCOL-DISCOVERY-MIB. Reading its description, it seems to do
what I need. So, I downloaded a file .my from the following address:
http://www.mibsearch.com/vendors/cisco/mibview/CISCO-NBAR-PROTOCOL-DISCOVERY-MIB

OK, the problem starts now.

I don't understand how to add this MIB to the SNMP system in order to access
the information throughout it. First, I copied the .my file to the
"net-snmp/agent/mibgroup" directory and to "net-snmp/mibs". I executed so
many commands (following many tutorials) that I'm not able to tell you which
ones I used :(

Using mib2c-mfd I generated some C extension files and I put it into:
"net-snmp/agent/mibgroup/CISCO-NBAR-PROTOCOL-DISCOVERY-MIB/cnpdSupportedProtocolsTable"
Then I compiled again the net-snmp with
"--with-mib-modules=cnpdSupportedProtocolsTable", also did make and make
install. It didn't show me any errors, so I assumed what I did was right.

I found in somewhere in the tutorials at net-snmp website the following
command:
# oidName -f -L
So, I tried to execute it in my case (in the agent/mibgroup/mibName/oidName
directory):
# ./cnpdSupportedProtocolsTable -f -L
And I get the following result:
Warning: Failed to connect to the agentx master agent ([NIL]):

I already added the line in the "/etc/snmp/snmpd.conf" file:
master agentx
But I get the same message.

Well... concluding... I don't know if I did the right procedure to add a new
MIB or not. I would like some directions. I really feel lost in the tutorial
pages of snmp because I'm really new in this context.

Currently, what I'm trying to do is to execute some command just to know if
the MIB was installed (added) successfully.

Thanks a lot for reading all this lines,
Ricardo.

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