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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