Subagent does not register its context

What do I need to put into my configuration file(s)?

I'm running net-snmp 5.4.1. I want to register an OID for a subagent 
with a particular context (because I need to register the same OID 
for other subagents with other contexts). It works for snmpv1, but of 
course my application requires it to work for snmpv3.

After trying everything -- I am very new to SNMP -- I finally got the 
Master Agent to forward the request to the subagent when I copied the 
createUser line from snmpd.conf to subagent1.conf. It works, but with 
a blank context.

I set the context in my subagent by using this code (which came from 
a Solaris demo_module_6):

         myreg = netsnmp_create_handler_registration(
                         "elementName",
                         get_elementCallback,
                         element_oid,
                         OID_LENGTH(element_oid),
                         HANDLER_CAN_RONLY);

         myreg->contextName = "myContext";

         netsnmp_register_read_only_instance(myreg);

but the subagent message to the Master Agent does not include the 
context string, so of course the Master Agent is unable to recognize 
that a GET should be forwarded to my subagent. Instead it decides 
VACM_NOSUCHCONTEXT. What do I need to configure to make this happen? 
The following command, as I said, works with v1 or with no context:

snmpget -r 1 -mALL -v 3 -u myuser -n "context" -l authNoPriv -A 
"my_password" localhost .elementName

Richard Freedman


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