[mrtg] Re: snmp v3 bug with low-speed interfaces
pavouk at pavouk.org
Mon Apr 17 20:27:26 MEST 2006
what version of MRTG do you use? Similar problem with ifspeed was fixed
before few months.
> On certain Cisco platforms, the ifHCInOctets counters are not populated
> for certain low-speed interfaces. This poses a dilemma for snmp v3
> users. The current scheme for snmp v2 relies on cfgmaker to determine
> if the ifHCInOctets counters exist, and if not changes the snmp version
> to "1" instead of 2. But snmp v3 provides not only different counters,
> but also different authentication methods, so a simple fallback to a
> different version of snmp is not sufficient.
> Possible approaches to fix this:
> 1. Check every query of ifHCInOctets for "NoSuchInstance" and fall back
> at run-time within MRTG_lib.pm
> 2. Create a separate flag in the interface config to query low-speed
> 3. change the line generated by cfgmaker to read something like:
> ifInOctets#Se0/1\:0&ifOutOctets#Se0/1:0:public at slowrouter::2:1:1:3
> Which fix should I work towards?
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