Thanks for the reply. The Simple_Async_Application in your link uses one session/socket/SRC port per agent. I've compiled and run this sample successfully, but I haven't been able to modify it to use a single session/socket/SRC port.
I understand "don't hammer agents" but I don't understand your "one query per agent" limit - is this a limitation of the API? I'm new to this API, I might be missing key concepts... but I am confused by the "traditional vs single" distinction, and I'm curious what "subsessions" are. On Tue, Jan 5, 2021, 4:26 PM Craig Small <csm...@dropbear.xyz> wrote: > Hi, > Wouldn't asynchronous queries do what you need? See > http://net-snmp.sourceforge.net/wiki/index.php/TUT:Simple_Async_Application > > I've written something similar but was using pysnmp and it seemed to do > the job. The trick is you also have to make sure you don't hammer the > agent; most agents are pretty awful and lock up if you hammer them too > much. For the reuse of the UDP port, you might need to go to socket level > ioctls and use SO_REUSEPORT. The danger is you can have only one and only > one query per agent. > > - Craig > > > On Sat, 2 Jan 2021 at 12:32, Ed Fair <quacksp...@gmail.com> wrote: > >> I'm trying to write an SNMP manager using the net-snmp API. The manager >> will use UDP in IPv4 and IPv6, and will be sending get-requests (and >> getbulk, and getnext) to 10000 agents (arbitrary number, but you get the >> idea - a relatively large number). Is there any way to do this using just >> a single session? >> >> I've compiled and experimented with the demo apps, they seem to use one >> session per agent. >> >> Creating 10000 separate sessions seems excessive (as I understand, this >> would consume 10000 sockets and 10000 distinct SRC PORTS from my host). >> >> Creating/using/closing 10000 sessions seems excessive as well. >> >> The reason I'm going here: my manager must interact with a firewall >> before sending any requests to any agents; a single firewall interaction >> identifying a single UDP source port would be much more desirable than >> 10000 firewall interactions identifying 10000 different UDP source ports. >> >> Thanks in advance for your comments. >> _______________________________________________ >> Net-snmp-coders mailing list >> Net-snmp-coders@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/net-snmp-coders >> >
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