SNMP: Capturing SSL Statistics per Virtual Server

This question about gathering SSL statistics was recently raised: "Can we use SNMP to read the number of sessions and TPS to a Virtual Server on BigIP LTM? If so, which SNMP variable can we use fo...
Published Nov 14, 2007
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Jeff_Silverman_'s avatar
Jeff_Silverman_
Historic F5 Account
Jan 11, 2008
Here is a bash script to calculate TPS over time

 

 

This is from an article Nathan Bultman wrote:

 

 

! /bin/bash

 

 

This script calculates TPS for any host. This script assumes that the SNMP community name is public and that

 

it uses version 2C of SNMP.

 

HOST=$1

 

COMMUNITY="public"

 

 

TNCs="F5-BIGIP-SYSTEM-MIB::sysClientsslStatTotNativeConns.0"

 

TCCs="F5-BIGIP-SYSTEM-MIB::sysClientsslStatTotCompatConns.0"

 

interval=10 seconds

 

 

 

TNC1=`snmpget -Ov -Oe -Ot -Oq -v2c -c $COMMUNITY $HOST $TNCs`

 

TCC1=`snmpget -Ov -Oe -Ot -Oq -v2c -c $COMMUNITY $HOST $TCCs`

 

echo "sleeping... do not disturb"

 

sleep $interval

 

TNC2=`snmpget -Ov -Oe -Ot -Oq -v2c -c $COMMUNITY $HOST $TNCs`

 

TCC2=`snmpget -Ov -Oe -Ot -Oq -v2c -c $COMMUNITY $HOST $TCCs`

 

echo "TCC1=$TCC1 TCC2=$TCC2 TNC1=$TNC1 TNC2=$TNC2"

 

let TPS="(($TNC2-$TNC1)+($TCC2-$TCC1)) /$interval"

 

echo "`date` $TPS" >> TPS_over_time.txt

 

 

You can then import the TPS_over_time.txt file into gnuplot, openOffice, koffice, or MS-Excel and make a graph of TPS over time.