Re: Engine ID discovery

Tue, 06 Apr 2010 02:12:53 -0700

Dave Shield wrote: 
On 6 April 2010 07:04, sanjaykumar <[email protected]> wrote:
  
           I am going through the "Engine ID discovery" code.
Could someone explain me about this concept ??
    

In order to use SNMPv3, it's necessary to know the "engineID" of the
agent (or strictly speaking, the "authoritative SNMP engine" - which is
the agent for GET* and SET requests).

One way to do this is to specify the engine ID explicitly
(e.g. via the -e command line option).   A number of other
SNMP toolkits work this way.

But the Net-SNMP code attempts to probe the remote agent
to discover this value, by sending a request without the engineID
in place.    This request will fail, but the response that comes back
includes the engine ID (and possibly the boot count/uptime values
as well).
   The client can then re-send the request including this information,
and hopefully the request should then succeed.


Dave
Hi Dave,

I am trying to send the snmp-inform to different SNMP-Manager.
But initially Engine ID is unavailable.
So we are sending the inform with WRONG engine ID, once we receive the REPORT then we update the required data-structure
then RESENT the inform request and it is working fine.  Does it correct  approach ???????
or is there any standard violation ??

Or i need to discover the engine ID, first  by sending the GET request , Then send the inform request.

rgds,
Sanjay

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