Wrong network data

[sugdyzhekov]

Hi,

We have two servers with CentOS 5 which use for traffic load balancing. One template with network load items was attached to these servers. One of these servers report incorrect data (looks like uses x10).

Where should I look the reason of such situation?

Screenshot attached.

[tchjts1]

What version of Zabbix are you using?

Show your item configuration. You should also have the "store value" set to Delta (speed per second)

[sugdyzhekov]

Zabbix 2.0.2 (latest stable)

Screenshot attached

[sugdyzhekov]

yes, data stored as delta

[sugdyzhekov]

I found the reason of such result..

I wrote next bash script to check that Zabbix does not have bug:

#!/bin/bash

set -e

IFACE=$1
DURATION_LIMIT=$2
TMP='/tmp/netdata'
DURATION=0

while [ $DURATION -le $DURATION_LIMIT ]; do
        DURATION=$(($DURATION + 1))
        CURRENT_BYTES=`ifconfig $IFACE | grep 'TX bytes' | awk '{print $6}' | cut -d':' -f2`
        if [ -e $TMP ];then
                echo -n "$DURATION) "
                BEFORE_BYTES=$(tail -n1 $TMP)
                DIFF=$(( $CURRENT_BYTES - $BEFORE_BYTES))
                MBIT=$( echo "scale=3; $DIFF / 1048576 * 8" | bc -q 2>/dev/null )
                echo "$MBIT mbit/s"
                sleep 1;
        fi
        echo $CURRENT_BYTES >> $TMP
done
rm $TMP

As result i got the same wrong data. I have check interface and found that it lost statistics data in some period (sec). After that i checked logs and found some strange errors about net driver. It was found in RedHat bug system as solved, so i'm going to update system to latest release or change hardware.

Thank you for your attention.

[tchjts1]

Thanks for posting the follow-up!