Monitor promiscuous interface

[plomby]

Hi,

I'm new to Cacti. I've installed a machine in order to monitor a network probe.
So basically, I have a probe that its interface are running in promiscuous mode. I'm using Cacti to monitor these interfaces.

For an unknown reason, I use gKrellm and see that traffic is over 2Gbps while in Cacti I see only ~100Mbps.

Does Cacti support monitoring Linux machines interface in promiscuous ?
And, if it does, should I install any plugins/hotfix etc..

Thanks,
Itay

[TheWitness]

You have to use 64 bit counters and mak sure the max value in the rrdfile is high enough.

TheWitness

[plomby]

Hi,

Can you please elaborate how I can use 64 bit counters and verify the maximum speed?

Thanks,
Itay.

[TheWitness]

When you enter the "Create Graphs" section of Device, or "New Graphs" from the Console menu, and view the Interfaces in your system, there is a dropdown to the lower right of the interface list. That Dropdown Includes a 64bit Graph Template. If you select that dropdown and the interfaces are disabled, you have 64bit Graphs.

The maximum value can be seen by running the "rrdtool tune" command on the corresponding interface rrdtool file.

It's a bit complicated at the moment. This should really be more automated as not everyone has the level of understanding on how to do these things.

TheWitness