Is there a way to query multiple variable at the same time?

Hello, there!

I'm working on a problem, how can I query multiple variables from a host at one time? Some NMS KPI value in my program have to be described as an expression like '(.1.3.6.1.2.1.2.2.1.10./.1.3.6.1.2.1.2.2.1.5.)*800' or '((.1.3.6.1.2.1.2.2.1.10.+.1.3.6.1.2.1.2.2.1.16.)/.1.3.6.1.2.1.2.2.1.5.)*800'. So these seperate variables must be fetched at the same time, otherwise the variable's value would be unusable.

I'm using net-snmp 5.4.2 lib. Any advice is appreciated and code example is more helpful. Thank you!

--------------
xiao ren
2008-06-24


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2008/6/24 xiao ren <reign99@21cn.com>:
> how can I query multiple variables from a host at one time?

By adding the relevant varbinds to the same request PDU.

> Any advice is appreciated

Just call "snmp_add_null_var()" several times to add each
of the necessary varbinds, before calling 'snmp_send()'
or 'snmp_synch_response()' to actually send the request.



> and code example is more helpful.

See apps/snmpget.c or apps/snmpstatus.c (or almost
any of the other command-line tools) for examples.

Dave

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2008/6/24 xiao ren <reign99@21cn.com>:
> Is there any way I can put in the expression directly by net-snmp api,
> or do I have to code seperately to identify algebra expression?

Sorry - that doesn't make sense.

Dave

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> From: net-snmp-users-bounces@lists.sourceforge.net
> [mailto:net-snmp-users-bounces@lists.sourceforge.net] On
> Behalf Of Dave Shield
> Sent: Tuesday, June 24, 2008 2:19 AM

> 2008/6/24 xiao ren <reign99@21cn.com>:
> > Is there any way I can put in the expression directly by
> net-snmp api,
> > or do I have to code seperately to identify algebra expression?
>
> Sorry - that doesn't make sense.

Fortunately I speak pidgin. The answer to the question is: No, you will need to code the algebra separately, as net-snmp only provides functions for data retrieval (well, it provides more than that, but for this problem only data retrieval).


HTH,

Mike

P.S. O.P., you should clarify your name. I can't help but read it "??", which I sincerely doubt is intended.

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