On 11 January 2011 22:45, Homan, Dave <[email protected]> wrote:
> Can someone please clarify how (or if) table_dataset.c creates indices for
> new rows if the values are NOT specified in an SNMP SET request?
How is it possible to send such a request?
There must be some varbind within the SET request that is used to
trigger the creation of the row. This will typically be a 'RowStatus'
varbind.
So this varbind will include the desired index values - which are
then used to create the new row.
> Note that evalIndex
> is read-only – this appears to be common in MIBs when using numeric
> indices.
It shouldn't be read-only - it ought to be 'not-accessible'
And this doesn't just apply to numeric indices - *all* index objects
should be 'not-accessible'
> I can certainly set MAX-ACCESS of the evalIndex ‘read-create’ and
> simply supply the index value in the multivariable SET, but I kinda wanted
> to know how the big boys do it with a ‘read-only’ index.
Take the index values from the other varbinds in the SET request.
You shouldn't need to (or be able to) supply varbinds for the index
objects explicitly.
> I have been able to set all the other columnar objects (including the
> RowStatus column) using a multivariable snmpset (with no index value
> supplied).
Eh?
How can you even *refer* to a RowStatus instance without supplying an
index value for it?
> I also tried setting the RowStatus value to ‘active’, thinking this might
> trigger some row index activity in the table data set handler. When I try
> to get the value of the index, I get a “no such instance message”.
That's because you haven't yet created the new row.
Please re-read the description of RowStatus syntax - either from the
MIB definitions, or any SNMP book. Pay particular attention to the
values 'create-and-wait' and 'create-and-go'
Dave
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