SNMP monitoring, Network total transfer in bytes with limited 32bits SNMP counters

[cyrus]

Hi,

I am having an issue with a template i am trying to do.

I found on several website that i am not alone with this issue but never found an answer.


The total incoming / outgoing network traffic of my device is on an SNMP ID.

I can get it with zabbix but as the counter is in 32 bits, it is limited to 4096 bits.

So when someone is downloading a 5 Gig file, the counter goes to 4096 and then back to zero and goes up to 1 gig.

The problem is when i set the data to "delta speed per second", the value is not "correct" as it is an average of the value per second depending of the snmp item.

When i set to Delta (simple change), it would work except that when the difference between 4096 (maximum value) the new value is a "minus" value.

So my graph never reach more than 4096.

I tried several calculated items but cannot get rid of "minus" values.

Is anyone found a way to calculate the total data transfer of an interface with 32 bits SNMP counters ?


Thanks in advance for your answers.

[nilie]

I don't know much about the device you are monitoring but at a minimum, it has to support :
- SNMP v2c or 3
- 64bit counters

so you can use ifHCInOctets (1.3.6.1.2.1.31.1.1.1.6) and ifHCOutOctets (1.3.6.1.2.1.31.1.1.1.10)

Hope that helps

[cyrus]

Thank you for your answer.

My problem is that the 64 bits counter does not exist on this device, it just reset to 0 when it reach it's max.