Cacti graph in BITS where SNMP values are in BYTES !

[fcalleja]

Hi, I have setup some graphes on an Alcatel switch (Omniswitch 6850)

I used the default SNMPinterfaces statistics to setup some graphes.
But the data displayed in the graph are showed in bits/s where in fact the real data are bytes/s.

Fo example : the extracted data shows a trafic of 10MBit/s when in real it is 10Mbytes/s.

How to change it back to bytes ?

I tried to modify bit/s to bytes/s in graph but the graph auto-adapt the value to bytes, so instead of having 10Mbytes/s , I got around 1Mbytes/s.

Thanks for your supprt.
Franck.

[BSOD2600]

You can change the graph type to a bytes/sec display.

Graph Management -> select the graph title. Bottom right corner, Choose an action: -> Change graph template -> select the correct one from the list and click Yes.

[fcalleja]

This has already been done.

My problem is :

I have a customer that send on a 1G link and for more than 5 minutes, a constant trafic approaching 1G on that port.

An what I see in Cacti is a tranfer rate of 100Mbit/s, instead of around 1Gbit/s.

So I deduce from that fact that Cacti interpret the extracted SNMP as bit where it is byte, or that I select the wrong graph type for the extracted value. But I used the default script "interface.xml", so I do not know where thee is a fault.

So if I use the "Change graph template" function, where I have 100Mbit/s, after I get around 10 Mbytes/s.

And I would expect to see 100 Mbytes/s.

[BSOD2600]

ahhh

You're not using 64bit templates (and counters) are you? Read http://forums.cacti.net/viewtopic.php?t=24526

[fcalleja]

Hi,

I dont think so. I use the included "Data Query [SNMP - Interface Statistics] " which, if I edit interface.xml, use the

ifOutOctet OID : .1.3.6.1.2.1.2.2.1.16
ifInOctet OID : .1.3.6.1.2.1.2.2.1.10

And in the Alcatel MIBs documents I have, these are Counter32 values.

I'll try to create a Counter64 graph to see if there is any difference.

Thanks for your support.
Franck.

[fcalleja]

Same if I use counter64.

Here are 2 pictures :

- One from Cacti (5 minutes)
- One from the management system (10s but during 2 minutes)

Same 10G interface.

The one taken from supervision center is showing a rate around 80 Mbytes/20Mbytes of In/out, where Cacti show same rate but in bits/s