When dealing with high speed (Gig and higher) interfaces, does anyone know
what OID MRTG uses for it's interface stats?
We came across a bug in our in-house monitoring system, in that we were
always polling the standard in/out octet counters. However, these aren't
absolute values, and get recycled after a billion octets or so. On a gig
link that's busy, that doesn't take long.
So, we found that interface absolute values are contained in
'18.104.22.168.22.214.171.124.1.1.6', which is ifHCInOctets and
'126.96.36.199.188.8.131.52.1.1.10', ifHCIOutOctets. These are all SNMP Version 2c
So, is MRTG smart enough to poll the right one on gig interfaces?
Otherwise, as we found, if you poll the V1 OID's, your graphs will be
sckewed, and tend to now show the right information.