Wrong traffic data comes to Zabbix 2.0.2

[Zev]

Hi, colleagues.
I have a problem with Zabbix 2.0.2. It looks like this.

I want to get traffic graph from cisco cat 6509 from tengig interface. If traffic less then about 600Mbps - all OK. But if traffic came bigger - I have a falling down the Zabbig graffic to about 0.
Zenoss is the same monitoring system. And it create good graphik. So the problem is not with 6509.

If the traffic raise - Zabbix plot the value like [real traffic value]Mbps - [about 600Mbps]. So if real traffic is 900Mbps (i see it on server and on 6509 intarface), Zabbix plots the 300Mbps.

I think the problem is in the MAX value in same variable in MySQL. But I can't find this variable.

Before i use Zabbix 1.8.1 and all was OK. It plots right graphs. I can't have a success upgrade, so I remove all and install Zabbix 2.0.2 from null.

OS RHEL 6.1 (x86_64), MySQL 5.1.52.

Me sorry for my bad English and, i think,a noob question, but I can find any info about it, so i need yuor help.

[Udo]

If the traffic raise - Zabbix plot the value like [real traffic value]Mbps - [about 600Mbps]. So if real traffic is 900Mbps (i see it on server and on 6509 intarface), Zabbix plots the 300Mbps.

Assuming SNMP:

Probably you are experiencing a 32 bit counter overrun (count up to 4.294.967.295 and then return to zero). This might happen every minute or so and the result (above a critical trigger point) is a consistently wrong measurement with too low values (realvalue MOD 4.294.967.296) presented.

The only correct solution is to make sure your are using 64bit counters.

Best regards
Udo

[Zev]

Dear Udo, thanks for your answer. Now I have a vector.

So I will take some tests and google. When I get a results - I will write them here.

[Zev]

It works. Big thanks to Udo.

The solution is to use 64 bit SNMP OIDs to device interfaces with capability lager then 650Mbps.

Cisco confirms it ( http://www.cisco.com/en/US/tech/tk64...800b69ac.shtml )

So. I chande the standart template, using this OIDs:
.1.3.6.1.2.1.31.1.1.1.6 IF-MIB::ifHCInOctets
.1.3.6.1.2.1.31.1.1.1.10 IF-MIB::ifHCOutOctets

And rescan my 6509 VSS with the new descovery template.





But I cant understand why I use the 32 bit SNMP OIDs in Zabbix v.1.8.1 and have right graphs with traffic, more than 800-900Mbps.
And why 32 bit counters drops info (650Mbps = 650.000.000 so it less, then 2^32 = 4.294.967.295).

But that is another question.