Nagios Support Forum

I am using MRTG with SNMP v3 on Cisco UCS systems with 10 GB virtual interfaces. Using MTRG with V3 on physical interfaces has been detected and works fine. The problem with these vNICs is that they have not been detected correctly, they were detected as 1 GB interfaces not 10 GB. Additionaly, they are reporting CRITICAL alerts at 80 Mbp/s which is incorrect, it should be 10 times that.

Using V3 should use the 64-bit counters automatically.

MaxBytes was detected at 12500000 (which is the setting for 1 GB)

I have run cfgmaker manually and it does not detect the port correctly.

I have edited the MRTG file and added 7 0s so that it should be the correct bandwidth and I have removed the rrd files.

Regardless of the settings in mrtg.cfg it is still triggering on settings that reflect 1 GB bandwidth. I am missing something...

In the setting for the services (in the CCM) what do you have in the $ARG2$ $ARG3$ $ARG4$ fields?

I checked today and after changing to the correct MaxBytes in the mrtg.cfg and removing the rrd files it is still triggering on the 1 GB values.

$ARG2$ 50,50
$ARG3$ 80,80
$ARG4$ M

Possible Solution:

I edited the mrtg.cfg file and entered the correct MaxBytes 1250000000, removed the vNIC rrd files and then edited the "M" in the CCM to "G" on a live port that was triggering on the 1 GB values. Immediately it seems to be working. Thanks Scott for getting me to think about the CCM values. I will verify this tomorrow as I will be changed around 100 of these today so I will post the results for confirmation.

That's what I was going to recommend if it was set to M....

this should work

Just to wrap this up. Making the changes suggested here solved the problem....thanks.