pySNMP: SNMPget example

[Ilya Etingof]

I'd suggest you to refer to "high-level" API documentation at
http://pysnmp.sourceforge.net/docs/3.x/ for getting used to
basic operations on SNMP objects (such as apiGetPdu(), apiSetVarBind()).

Also, note, that pysnmp s/w (the third branch) has been closely aligned
with the APIs introduced by SNMP RFCs, so reading these RFCs may be
helpful too.

If you got more specific questions, please, let me know.

-ilya

WIWA <wim_wauters at skynet.be> wrote:
> Thanks Ilya,

> This has been very helpful. I'm able to get data out of my 'device
> under test'.

> I must be honnest and say that I understand the sample code, but could
> not write or produce it myself.

> How do you know e.g that
> req.apiGetPdu().apiSetVarBind([('1.3.6.1.2.1.1.1.0', None)]) can be
> written? I've read through the documentation and could not find
> anything similar. Of course, I could overlook it.

> Isn't there a tutorial out there that summarizes pysnmpv3 and gives
> examples of snmpget, snmpset, snmpwalk, etc...

> Thanks in advance for helping me out.

> Regards,

> Wim





> Ilya Etingof <ilya at cray.glas.net> wrote in message news:<betnfr$dqj$1 at news.rol.ru>...
>> > 2) when using: 'from pysnmp import role' (found on
>> > http://pysnmp.sourceforge
>> > .net/examples/2.x/snmpget.html), I get the message 'ImportError:
>> 
>> You seems to use pysnmp 2.x API which differs from the latest 3.x branch
>> (though, a compatibility layer exists in 3.x distribution). That's why
>> I suggest you looking at the 3.x docs and examples at:
>> 
>> http://pysnmp.sourceforge.net/docs/3.x/index.html
>> 
>> > 3) A general question: how can I get a list of what I can type after
>> > the 'from
>> > pysnmp import ...'
>> 
>> dir(<module>) may help but in this case I'd better see an example.
>> 
>> > 4) How can I use: 'from snmpget import snmpget'. It does not accept
>> > this.
>> 
>> There is no such module as snmpget in pysnmp.
>> 
>> > 5) Anyone has a simple example for the following application: I have a
>> > cable
>> > modem (which has an SNMP agent inside). I want to make a script where
>> > I can
>> > do SNMPgets (and later SNMPSet and SNMPwalk). 
>> 
>> Python 1.5.2 (#3, Aug 25 1999, 19:14:24)  [GCC 2.8.1] on sunos5
>> Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>> >>> from pysnmp.proto import v1
>> >>> from pysnmp.proto.api import generic
>> >>> from pysnmp.mapping.udp import role
>> >>> req = v1.GetRequest()
>> >>> req.apiGetPdu().apiSetVarBind([('1.3.6.1.2.1.1.1.0', None)])
>> >>> tr = role.manager(('router-1.glas.net', 161))
>> >>> (answer, src) = tr.send_and_receive(req.encode())
>> >>> rsp = v1.GetResponse()
>> >>> rsp.decode(answer)
>> >>> vars = rsp.apiGetPdu().apiGetVarBind()
>> >>> print vars
>> [('.1.3.6.1.2.1.1.1.0', OctetString('Cisco Internetwork Operating System
>> Software\015\012IOS (tm) 5400 Software(C5400-JS-M), Version 12.2(11.8b), 
>> MAINTENANCE INTERIM SOFTWARE\015\012 Copyright (c) 1986-2002 by cisco 
>> Systems, Inc.\015\012 Compiled Tue 30-Jul-02 19:02 by pwade'))]
>> >>>
>>  
>> > 7) What is the difference between snmpget and getrequest in pysnmp? 
>> 
>> The only difference is the SNMP request object (GetRequest vs GetNextRequest)
>> you create when building SNMP message.
>> 
>> -ilya