Why is rrd_maximum for traffic always 1,000,000 on DZS ONT

[vtchelp]

We are trying to graph traffic for DZS ONTs but the rrd_maximum for traffic_in and traffic_out always gets set to 1,000,000 even though the Speed shows 1000000000. Hight Speed shows 1. When there is more than 8M of traffic, the graphs show nan. Any help will be appreciated. Thank you.

[TheWitness]

If the ifHighSpeed is reporting improperly, reach out to the hardware vendor to request as to why this is happening. In the mean time, it's going to be more than likely you need to manually adjust the rrdtool max value for both the inbound and outbound data sources. The way you do that is pretty strait forward.

1. Locate the RRDfile name
2. Run the rrdtool info $rrdfile command to see what the current max-value is.
3. Run the rrdtool tune $rrdfile -a traffic_in:somevalue -a traffic_out:somevalue to increase the max value to what makes sense for the interface in question.

It must also be said that you should be using 64bit counters. Don't use 32bit graphs in 2025 unless you are monitoring poor old windows, where Microsoft has not invested in their snmpd package in over 20 years, because it's pointless (due to the underlying monitoring architecture not supporting 64bit numbers, yea no kidding, even in 2025!).

[vtchelp]

Before seeing the previous reply, we found that deleting rrd_maximum from the Data Query seems to make this work; see attached screenshot. We are not sure what the consequences of this are yet, but if it saves us from having to fix lots of rrd files, this is what we will try. Please let us know if this will cause problems or if there is a simple way of fixing lots of rrd files without running the rrdtool tune command on each one at a time. Thank you.

Cacti_rrd_maximum.png (151.4 KiB) Viewed 1050 times

[TheWitness]

Yea, if you have a vendor that provides an inaccurate ifSpeed or ifHighSpeed, all bet's are off.