[mrtg] MRTG-RRD anomaly!!

Mon Sep 29 06:09:32 CEST 2008

Hi,

We have created MRTG(with RRD support) configuration for two interfaces and
one for the aggregation of those two interfaces.

MRTG of two interfaces are working well but the aggregation graph sometimes
is showing wrong graph. It seems it is just forgetting to sum up the graphs.

i.e. 

interface 1  current in: 64.93Mb   out:18.04Mb

interface 2 current in:59.33 Mb  out:3.12Mb

int1+int2  current in :11.32 Mb    out:  21.17Mb

Interestingly, only IN traffic of aggregation is affected, not OUT traffic.

The configuration files are as follows:

HtmlDir: /var/www/mrtg

ImageDir: /var/www/mrtg

LogDir: /var/lib/mrtg

ThreshDir: /var/lib/mrtg

EnableIPv6: no

Options[]:growright,bits

LogFormat:rrdtool

#Interface 1

Title[s]: S Traffic Analysis

Target[s]: 29:public at 192.168.1.1

setENV[s]:MRTG_INT_IP="202.18.133.34" MRTG_INT__DESCR="POS 0/0/2/0"

MaxBytes[s]: 2000000000

#Interface2

Title[t]: T Traffic Analysis

Target[t]: 34:public at 192.168.1.1

setENV[t]:MRTG_INT_IP="203.22.98.46" MRTG_INT__DESCR="POS 0/0/2/1"

MaxBytes[t]: 2000000000

#Interface1+interface 2

Title[submarine]: SUBMARINE Traffic Analysis

Target[submarine]: 29:public at 192.168.1.1 + 34:public at 192.168.1.1

setENV[submarine]:MRTG_INT_IP="" MRTG_INT__DESCR=""

MaxBytes1[submarine]: 40000000000

MaxBytes2[submarine]: 40000000000

There are 3 separate config files.

We have generated log files using  - -logging and - - debug command. - -
debug command is with "log,base,snpo"  parameters and found no error.

Have anyone faced this problem?

Please advise.

Thanks and regards,

Firdous Saleheen

Engineer

Mango Teleservices Limited

82,Mohakhali C/A,(12th floor),

Dhaka-1212.

E-mail - saleheen.firdous at mango.com.bd

Telephone- +880 37 71800500, +880 37 71800501

Cell- +8801730068832

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