SNMP timeout problem

Hi

I am developing a simple C++ program with the latest release of NET SNMP
(5.5) and I am having a problem while connecting to some SNMP devices... but
it works well with almost all examples I tried.

The program tries to connect to the target via IP and returns a "snmp walk":
all oids list and values.

It works perfectly well with almost all devices I tried.

The problem I am observing is as follows:


struct snmp_session session;
snmp_sess_init(&session);
...
....
session.timeout = very long integer!!!

void* ss = snmp_sess_open(&session); // This executes ok
...
...
status = snmp_sess_synch_response(ss, pdu, &response);

At this time it returns STAT_TIMEOUT (
http://netsnmpj.sourceforge.net/docs/org/netsnmp/NetSNMP.html#STAT_TIMEOUT)
with the failing devices. No matter how big is "session.timeout" parameter.

The devices have SNMP enabled, SNMP v1 compliant, and no network problem at
all. In fact, some free snmp utilities are able to connect and obtain info.

Can anybody help? Any ideas?

Thank you very much
Best regards!!

David

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