[mrtg] target sum problem even with 64 bits counter...

[McDonald, Dan]

On Fri, 2008-10-10 at 07:02 -0700, jy.cadic wrote:
> hello,
> i've got a problem, let me explain it :
> 
> Target[global]: 7:plop at xx.xx.xx.126 + 7:plop at xx.xx.xx.35 +
> 7:plop at xx.xx.xx.22
> WithPeak[global]: ymwd
> Directory[global]:fwvip
> MaxBytes[global]: 900000000
> Title[global]: Trafic FW VIP 
> PageTop[global]:  Traffic Analysis for FW VIP A + B + C
> 
> all the three firewalls give me by mrtg a good graph. up to 457Mbit/s
> 
> but the sum give me the same symtpom of the counter32 problem , but with a
> limit near 600 Mbit/s...
> 
> any clue ?

Yes, mrtg has no logic to handle multiple roll-overs, even with 64 bit.
The best way to handle this is to create three separate rrdfiles, and
then create a stacked presentation in routers2.cgi.


-- 
Daniel J McDonald, CCIE #2495, CISSP #78281, CNX
Austin Energy
http://www.austinenergy.com

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