Re: agentx: how do I register my traps

On Thu, Apr 12, 2012 at 3:17 PM, Stéphane Charette <
[email protected]> wrote:

> Just joined the list 30 seconds ago.  :)  I'm working with net-snmp and
> agentx. I have to register my enterprise OIDs for scalars and tables. For
> example:
>
> > netsnmp_register_read_only_scalar(...); // register my scalars
> > netsnmp_tdata_register(...); // register my table
>
> Until I make those calls in my agentx code, my OIDs don't show up in snmpd.
>
> My MIB file also has NOTIFICATION-TYPE definitions, such as:
>
> > myTrapTest NOTIFICATION-TYPE
> >     STATUS          current
> >     DESCRIPTION     "A sample trap."
> >     ::= { myNotifications 1 }
>
> I took a look at #include <net-snmp/agent/agent_trap.h> but this file
> seems to be about sending traps, not registering custom ones.
>
> My question: What do I call to register my trap definitions?
>

You need to 'register' variables/tables so that the master
agent knows which sub-agent to call/invoke (you versus the other guy)
when a particular OID is get/set, but...

You don't have to 'register' trap definitions, you simply have to
'send' the (correctly composed) notification (agentx-Notify-PDU).

... because here, _you_ are the one in control, and the master (in this
case) doesn't care where the notification is originating from or
what it contains.  It is simply re- formats what it gets and directs
your notifications to the configured NMSs.

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