By: JP

JP — Sun, 22 Jun 2008 01:18:58 +0000

Little script I wrote to check network bandwidth on our AIX servers via SNMP for Nagios, and then graph the results with PNP4 nagios every 5 minutes. Need to know the adapter # you are monitoring, do an snmpwalk usually to get the info…i.e. snmpwalk -v 1 -c public IP-address |more will give you IF-MIB::ifDescr.1 = STRING: en2, en2 number is from ifDescr which is 1, then just run the script as check_band.sh IP-address 1

#!/bin/bash

bytesin1=0
bytesout1=0
bytesin2=0
bytesout2=0
time1=0
time2=0

snmpget -Cf -c public -v 1 $1 .1.3.6.1.2.1.1.3.0 .1.3.6.1.2.1.2.2.1.16.$2 .1.3.6.1.2.1.2.2.1.10.$2 > /tmp/$1.bandinfo.txt

bytesin1=”`grep InOctets /tmp/$1.bandinfo.txt | awk ‘{print $4}’`”
bytesout1=”`grep OutOctets /tmp/$1.bandinfo.txt | awk ‘{print $4}’`”
time1=”`grep Time /tmp/$1.bandinfo.txt | awk ‘{print $4}’ | sed ’s/.$.*$/\1/’ |sed ’s/$.*$./\1/’`”

`/bin/sleep 6`

snmpget -Cf -c public -v 1 $1 .1.3.6.1.2.1.1.3.0 .1.3.6.1.2.1.2.2.1.16.$2 .1.3.6.1.2.1.2.2.1.10.$2 > /tmp/$1.bandinfo2.txt

bytesin2=”`grep InOctets /tmp/$1.bandinfo2.txt | awk ‘{print $4}’`”
bytesout2=”`grep OutOctets /tmp/$1.bandinfo2.txt | awk ‘{print $4}’`”
time2=”`grep Time /tmp/$1.bandinfo2.txt | awk ‘{print $4}’ | sed ’s/.$.*$/\1/’ |sed ’s/$.*$./\1/’`”

bytesindiff=$(($bytesin2 - $bytesin1))
bytesoutdiff=$(($bytesout2 - $bytesout1))
timediff=$((($time2 - $time1)/100))

KBpsIN=$(($bytesindiff/($timediff*1024)))
KBpsOUT=$(($bytesoutdiff/($timediff*1024)))

perf=”| KBps_in=$KBpsIN;;;; KBps_out=$KBpsOUT;;;;”

if [ "$KBpsIN" -lt 0 ]; then
echo “Bandwidth loop — no info”
exit -1
fi
if [ "$KBpsOUT" -lt 0 ]; then
echo “Bandwidth loop — no info”
exit -1
else
echo “IN: $KBpsIN KBps, OUT: $KBpsOUT KBps $perf ”
exit 0
fi

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By: JP