> This is the first time I'm answering a question ;-). > Experts please correct me if I'm wrong.
Sorry, John. Although most of what you say is strictly correct, it gives a somewhat misleading impression of the role of the 'netsnmp_session'. Despite my current sabbatical from the lists, I can't let this pass uncorrected. Yes - UDP-based protocols such as SNMP don't typically use the same sort of "transport session" as you'd see in telnet, ssh, etc. But the Net-SNMP idea of a "session" is *not* restricted to the AgentX master<->subagent communication. Instead, the clue lies in your second comment: > 2. Each PDU is supposed to have authorization information, if any. It's this "administrative" information that the SNMP session is concerned with. Rather than create the PDU and add the authorization (or community) settings to it directly, the typical model is to create a 'netsnmp_session' structure and use *that* to hold the various bits of admin information (including the address of the remote agent). Then when it comes to sending the actual request, 'snmp_send' is given both the PDU and the session structure, and will fill in any missing PDU header fields from the session structure. And if there are a series of requests to be sent to the same agent, then the same session structure can be used for each of them. So it's representing "logical session", rather than an actual network connection - a "level 7 session" rather than TCP's "level 4/5 session", if that makes sense. > There's a memo draft > http://www.potaroo.net/ietf/idref/draft-hardaker-snmp-session-sm/ > that attempts to address this. That's something of a red herring here, I think. Yes, it probably touches on some of the same ideas, but in terms of Gemma's original question, it's not really relevant, The Net-SNMP use of sessions is purely concerned with bundling assorted administrative information. Dave ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Net-snmp-users mailing list [EMAIL PROTECTED] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
