Re: SNMPv3: two request needed to get response(msgAuthoritativeEngineTime)?

2009/4/22 mike one <[email protected]>:
> I just thought that it can be adjusted with the aid of
> netsnmp tools inside, withot extra C-programming.

In principle - yes, it can.    There is an option '-Z' which
can be used to specify the engine boots/time values.

But the problem is that these are basically internal
"housekeeping" values - they are not reported back
by the command-line client commands.
   And not only would you need to craft a way to
retrieve these values initially, you would also need to
keep track of *when* the various commands were sent
(so that you could update the time field accordingly).


So in practise - no, I don't think this is realistic if
you are working with the  client commands.   They
are designed as "one-shot" requests, so will probe
for this information each time.


If you want to avoid these subsequent probes, you are
really looking at coding a suitable long-running application.
That would be much less work than trying to hack together
some method for passing this information to the individual
snmpget commands.

> Means this that I can not use Nagios as monitoring server
> for the switches via SNMPv3, because Nagios uses external
> scripts

Well, you *can* use individual snmpget requests for this.
But only at the cost of an extra probe each time.
(Ignore the fact that this appears to be a GET request - it's
actually processed as an engine probe).

Alternatively, you could have a long-running process to make
the requests, and invoke a one-shot command to communicate
with this.

But it might also be worth asking on the Nagios lists to see if
anyone there has run into a similar situation, and has some
ideas about how to solve it.

Dave

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