Re: MIB writing and index in the middle of the OID

On Fri, Jan 31, 2014 at 2:18 PM, Florian Lohoff <[email protected]> wrote:

>
> Hi,
> i am trying to enable some of our applications with AgentX support.
> I got net-snmp married to libevent which works. Now i am trying
> to wrap my head around how to design the mib and the AgentX code.
>
> My immediate idea was something like
>
> ...enterprises.acme.apps.appname.$pid.stats.received.$peer
>
> Which made me think if its possible to put and index in the
> middle of the oid tree like this and how to write a MIB
> for something like this.
>
> From looking around i only found indexes at the end of the
> oid.
>

You are correct, indexes always come last.


> So that would be
>
> enterprises.acme.apps.appname.stats.received.$pid.$peer
>
> When walking something like enterprises.acme.apps.appname.stats i would
> always talk to all app instances because their stats are interleaved.
>

That is the unfortunate side effect.
So rather than walking, I would recommend doing a get on all the
columns you 'know' you are interest in (for the given pid/peer).

[I have enhanced all of my management applications to behave
this way simply to speed up retrieving bulk data on slow networks.]

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