On Mon, Jun 14, 2021 at 12:13 PM Gessner, Spencer J. via Net-snmp-users <
net-snmp-users@lists.sourceforge.net> wrote:
>
> I run into the following issue when trying to get/set certain objects. For
> example:
>
> >> snmpget -v 2c -c public poe-b34-ex01
> POWER-ETHERNET-MIB::pethPsePortAdminEnable.0.1
> POWER-ETHERNET-MIB::pethPsePortAdminEnable.0.1: Unknown Object Identifier
> (Index out of range: 0 (pethPsePortGroupIndex))
>
This is saying that value 0 for pethPsePortGroupIndex is invalid according
to the MIB:
pethPsePortGroupIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
0 is not inside the range 1..2147483647.
>
> But if I use the input option “r” it works:
>
> >> snmpget -v 2c -c public -Ir poe-b34-ex01
> POWER-ETHERNET-MIB::pethPsePortAdminEnable.0.1
> POWER-ETHERNET-MIB::pethPsePortAdminEnable.0.1 = INTEGER: true(1)
>
> That is a good solution, but I am working with software that is part of
> the EPICS control system and it does not accept the “r” option.
>
> My question is why is the “r” option needed in the first place? Is there
> something wrong with the MIB file?
>
There is something wrong with the vendor's implementation. They are
storing 0 in a place where the MIB says that 0 is not a valid value. "-Ir"
says that net-snmp should allow the use of values that violate the
restrictions of the MIB.
I am not familiar with EPICS, but perhaps it has a configuration to allow
the use of values that violate the restrictions of the MIB. Alternately,
you could see if the vendor could fix the bug in their implementation (and
of course upgrade the software on your devices).
Bill
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