[SNMP4J] SNMP v2 - getTable()

[Frank Fock]

Hi Holger,

I would think that (3) is true. With SNMPv1 only GETNEXT
operations are performed to get the rows of a table.
With SNMPv2c GETBULK is used where more than one row
can be returned by the agent per response PDU.
In such a case, the response PDU may exceed an internal
limit of the command generator or (more likely) of the
agent (=command receiver). In such a case, the agent
should a response with a much elements as would fit
into in a PDU with maximum size. If such a response would
not be valid (i.e., contain less elements as the request),
then a tooBig error must be returned.

A simple timeout points to a bug in the agent.
To workaround the bug, you can reduce the maxRepetitions
parameter.

Best regards,
Frank

Holger Grütjen wrote:
> Hi,
> 
> When invoking the method TableUtils.getTable(target, oids, oid, oid1) for requesting six (or more) columns using SNMP v1 everything works fine, I finally get some rows as response.
> 
> But when I change to SNMP v2, then I get a timeout. This is NOT the case if I'm just requesting five columns or less, then everything works fine too.
> 
> Does anyone knows the reason for that?
> 
> 1) is there some kind of restriction for SNMP v2?
> 2) may this be a bug of SNMP4J?
> 3) may this be a bug of the device?
> 
> Regards,
> Holger
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