Уровень сигнала трансивера через SNMP в Cisco

#!/bin/bash
E_OPTERROR=65
verbose=0

get_type () {
        if [ -z "$1" ]           # Length of argument is 0?
        then
                exit $E_OPTERROR
        elif [ "$1" -eq "1" ]
        then truetype=other
        elif [ "$1" -eq "2" ]
        then truetype=unknown
        elif [ "$1" -eq "3" ]
        then truetype=voltsAC
        elif [ "$1" -eq "4" ]
        then truetype=voltsDC
        elif [ "$1" -eq "5" ]
        then truetype=amperes
        elif [ "$1" -eq "6" ]
        then truetype=watts
        elif [ "$1" -eq "7" ]
        then truetype=hertz
        elif [ "$1" -eq "8" ]
        then truetype=celsius
        elif [ "$1" -eq "9" ]
        then truetype=percentRH
        elif [ "$1" -eq "10" ]
        then truetype="rpm"
        elif [ "$1" -eq "11" ]
        then truetype=cmm
        elif [ "$1" -eq "12" ]
        then truetype=truthvalue
        elif [ "$1" -eq "13" ]
        then truetype=specialEnum
        elif [ "$1" -eq "14" ]
        then truetype=dBm
        else echo type=$1,error; exit $E_OPTERROR
        fi
        return 0
}

get_scale () {
        if [ -z "$1" ]     # Length of argument is 0?
        then
                exit $E_OPTERROR
        elif [ "$1" -eq "1" ]
        then truescale=yocto
        elif [ "$1" -eq "2" ]
        then truescale=zepto
        elif [ "$1" -eq "3" ]
        then truescale=atto
        elif [ "$1" -eq "4" ]
        then truescale=femto
        elif [ "$1" -eq "5" ]
        then truescale=pico
        elif [ "$1" -eq "6" ]
        then truescale=nano
        elif [ "$1" -eq "7" ]
        then truescale=micro
        elif [ "$1" -eq "8" ]
        then truescale=milli
        elif [ "$1" -eq "9" ]
        then truescale=""
        elif [ "$1" -eq "10" ]
        then truescale=kilo
        elif [ "$1" -eq "11" ]
        then truescale=mega
        elif [ "$1" -eq "12" ]
        then truescale=giga
        elif [ "$1" -eq "13" ]
        then truescale=tera
        elif [ "$1" -eq "14" ]
        then truescale=exa
        elif [ "$1" -eq "15" ]
        then truescale=peta
        elif [ "$1" -eq "16" ]
        then truescale=zetta
        elif [ "$1" -eq "17" ]
        then truescale=yotta
        else echo scale=$1,error; exit $E_OPTERROR
        fi
        return 0
}
#reading the options
while getopts ":c:h:i:v" Option
do
#echo $OPTIND
  case $Option in
    c     ) community=$OPTARG;;
    h     ) host=$OPTARG;;
    i     ) interface=$OPTARG;;
    v     ) echo "Verbose mode is set";verbose=1;;
    *     ) echo "Usage: `basename $0` -c community -h host -i interface"; exit $E_OPTERROR;;   # default options
  esac
done
shift $(($OPTIND - 1)) #moving on to the next provided option
if [ -z "$community" ] || [ -z $host ] || [ -z $interface ]  # if some of options is not submitted
then
          echo "Usage: `basename $0` -c community -h host -i interface"
            exit $E_OPTERROR        
fi
if [ $verbose -eq 1 ]
then
        echo "community is "$community""
        echo "host is "$host""
        echo "interface is "$interface""
fi
#looking for the index of sensor
if [ $verbose -eq 1 ]
then
                echo "executing snmpwalk"
fi
# step1: getiing information from device
walksnmp=`snmpwalk -v 2c -c $community $host  1.3.6.1.2.1.47.1.1.1.1.7 | grep $interface`
# step2: parse received string
if [ $verbose -eq 1 ]
then
        echo "parsing snmpwalk result"
fi
rx_string=`echo $walksnmp | grep -o -e "[0-9]* = STRING: "[ 0-9/a-zA-Z]*Receive[ 0-9/a-zA-Z]*""`
rx_sensor=`echo $walksnmp | grep -o -e "[0-9]* = STRING: "[ 0-9/a-zA-Z]*Receive[ 0-9/a-zA-Z]*"" | cut -f1 -d " "`
tx_string=`echo $walksnmp | grep -o -e "[0-9]* = STRING: "[ 0-9/a-zA-Z]*Transmit[ 0-9/a-zA-Z]*""`
tx_sensor=`echo $walksnmp | grep -o -e "[0-9]* = STRING: "[ 0-9/a-zA-Z]*Transmit[ 0-9/a-zA-Z]*"" | cut -f1 -d " "`
if [ $verbose -eq 1 ]
then
        echo "index of rx_sensor parsed to $rx_sensor"
        echo "index of tx_sensor parsed to $tx_sensor"
        echo "$rx_string"
        echo "$tx_string"
fi
#getting the sensor value
if [ $verbose -eq 1 ]
then
        echo "getting the sensor value"
fi
rx_value=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.4.$rx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
  rx_precision=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.3.$rx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
    rx_type=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.1.$rx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
    get_type $rx_type
    rx_type=$truetype
      rx_scale=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.2.$rx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
      get_scale $rx_scale
      rx_scale=$truescale
tx_value=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.4.$tx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
  tx_precision=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.3.$tx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
    tx_type=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.1.$tx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
    get_type $tx_type
    tx_type=$truetype
      tx_scale=`snmpget -v 2c -c $community $host 1.3.6.1.4.1.9.9.91.1.1.1.1.2.$rx_sensor | grep -o -e "INTEGER: [-+0-9]*" | cut -f2 -d" "`
      get_scale $tx_scale
      tx_scale=$truescale
let lengthrx=${#rx_value}-$rx_precision
let lengthtx=${#tx_value}-$tx_precision
echo RX=${rx_value:0:$lengthrx}.${rx_value:$lengthrx} $rx_scale$rx_type
echo TX=${tx_value:0:$lengthtx}.${tx_value:$lengthtx} $tx_scale$tx_type
exit 0