Re: Wrong Type (should be Counter64): Counter32: 4278126933

On Wed, 2005-10-19 at 20:57 +0200, Turbo Fredriksson wrote:
> In another thread to day (private MIB definition problem)
> you talked about "using two 32-bit integer index values"...
> 
> Could you please explain what that means and how to accomplish
> it?

Sure -  it's probably easier to illustrate with 2-digit
(decimal) values, but applying the same concept to 32-bit
(binary) values should be fairly straightforward.  This
will be left as an  exercise for the student :-)


Assume that I have a table, indexed by 4-digit values (in the
range 0-9999).   The most natural way to represent an entry in
this table would be of the form:

	myTable.someColumn.1234


But unfortunately, VSNMP(*) can't handle the index value 1234.
It's just Too Darned Big.
     (*) Very Simple Network Management Protocol


Instead, I must define the table as taking *two* index values:
	hectoIndex, unitIndex
(each in the range 0-99).  So the same entry can now be
represented as:

	myTable.someColumn.12.34

The indexing "looks wrong" (particularly if this uses 32-bit
binary values), but a suitable front-end application can
recombine the two values, and display the results appropriately.



> Does it have any relevance here? I don't want it in the index,
> but in a table column.

Yup.
Exactly the same technique can be used for column values.
Split one (64-bit) value into two (32-bit) values, and
have the management application re-combine them.



> > You're probably better off looking at using an embedded
> > perl or C-based implementation.
> 
> I've seen the references to 'embedded perl', but I never followed
> through... Would it be easy to convert my current pass_persist
> perl script to an embedded one?

Pass - it's not something I've ever really looked at.

> Is there any documentation about this?

   http://www.net-snmp.org/tutorial/tutorial-5/toolkit/perl/index.html

and
 
   $ man snmpd.conf

   EMBEDDED PERL SUPPORT


Dave


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