[Xymon] A few patches to improve SNMP data collection

[Jeremy Laidman]

Brian

Thanks for your work on this. Hopefully your patches will make it to
mainline source.

A question about the patch for graphs.cfg. The RRD files I have named
ifmib.<ifname>.rrd all have InOctets and InUcastPkts. I think these are
created by Devmon. I would think that most deployments using SNMP with
Xymon use devmon for this, so there may be a lot of RRD files using the
pre-patched version of the [ifmib] section from graphs.cfg, and their
presentation would break if your patch was applied. I wonder if it's a
better idea to patch snmpmibs.cfg to use inOctets instead of ifInOctets,
etc, and maintain compatibility with devmon.

Cheers
Jeremy

On Thu, 1 Jul 2021 at 15:10, Brian Scott <Brian.Scott at bunyatech.com.au>
wrote:

> Hi,
>
> I've been poking about with SNMP data collection with xymon for the last
> few days and have a few patches that may be useful for the next release,
> or for others exploring SNMP processing.
>
> The one for snmpmibs.cfg is from a post by Jeremy Laidman a while back
> so may already be in source control. It just removes a unwanted '(' from
> a mib definition. Thanks.
>
> The graphs.cfg patch is for typing mistake in the graph definition for
> ifmib and ifmib1.
>
> The xymon-snmpcollect.c one is for a programming error in automatically
> finding the snmphosts.cfg file if not specified on the command line.
>
> Finally, the showgraph.c patch is an enhancement to create a new
> substitutable, @BLANK@, that outputs blanks to take up the same space as
> @RRDPARAM@ in the graph legend.
>
> I've done a bit of a write-up of what I've done/found which I'll send a
> link to in the next few days.
>
>
> Cheers,
>
> Brian Scott
>
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