Re: MIB desgin problem.
Dave Shield <[email protected]>
| Newsgroups | gmane.network.net-snmp.user |
|---|---|
| Message-ID | <[email protected]> |
[ First - *please* don't mail me privately, without copying
any responses to the mailing list. I don't have the time
or inclination to offer private, unpaid, SNMP consultancy.
Keep discussions to the list, where others can both learn
and offer advice. Thanks. ]
2009/4/28 Noppadol Sotanakul <[email protected]>:
> I have verified my MIB with www.simpleweb.org. I've got a warning about the
> MIB as follows:
>
> warning: index of row `interfaceEntry' can exceed OID size limit by 397 subidentifier(s)
> warning: index of row `serverEntry' can exceed OID size limit by 142 subidentifier(s)
>
> What do they mean? Are they caused from too much items in the MIB?
No - they are triggered by the definitions of the MIB objects used to
index these two tables.
You haven't said anything about the structure of these two tables,
but I suspect that they are probably indexed by string values.
The length of an OID is limited to 128 sub-identifiers (RFC 2578, section 3.5)
so this means that the value of an index string must be shorter
than this (taking into account the length of the OID of the MIB column
objects themselves)
Your MIB object definitions for the column objects allow values longer
than this (probably up to 256 or 512 characters, at a guess). So
the SMI syntax checker is warning you to be careful.
> I would like to know how I can get those numbers (397, 142), how to
> calculate them.
max length of string value + length of column OID - 128
Dave
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