check_port_switch

check_port

#!/bin/bash
OK=0
CRITICAL=2
STATE=0
PLUGIN_PATH="/usr/local/nagios/libexec/"
OID_sysDescr=SNMPv2-MIB::sysDescr.0
OID_hostname=SNMPv2-MIB::sysName.0
COMMUNITY=bimat
VERSION="1.1"
author="hafthanhf"
portdown="/tmp/pd_$host_ip"
admindown="/tmp/ad_$host_ip"
print_version() {
  echo "$SCRIPTNAME" version "$VERSION"
  echo "This nagios plugins comes with ABSOLUTELY NO WARRANTY."
  echo "You may redistribute copies of the plugins under the terms of the GNU General Public License v2."
  echo -e "Change log:\n Fix SuchIntance alert\n work on Cisco devices: 2960, 2960G, 3750, EX4200, EX3200 "
  echo "Writen by $author - hanoi 10/4/2014"
}

print_help() {
  echo "**** Check physical port on a network device  ****"
  echo -e " -H ADDRESS  - Hostname to query (default: 127.0.0.1)\n -h print this help \n -V Print version"
  echo "********************************"
  echo "Exp: ./check_port -H 10.255.0.xxx"
  echo "Befor using this plugin, you must shutdown all unuse port or it will make unnecessary alerts"
  echo "**********Tested devices: Cisco 2960, 2960G, 3750, 3750G*********"
}
# Arguments
while getopts H:hV OPT
do
  case "$OPT" in
    H) host_ip="$OPTARG" ;;
    h) print_help
       exit $STATE ;;
    V) print_version
       exit $STATE ;;
     *) print_help
	exit 0 ;;
   esac
done
############################
######---Main----###########
############################
COMMAND="snmpwalk -v 2c -c $COMMUNITY $host_ip"
#touch $portdown
#touch $admindown
#Get system infomation
#sysinfo=` $COMMAND  $OID_sysDescr | awk 'NR==1 {print $4}'`
#hostname=`$COMMAND  $OID_hostname | awk 'NR==1 {print $4}'`
#################  INFO   ############
###########################################
#echo "############ $LS ########"
#echo $sysinfo
pd=`$COMMAND  IF-MIB::ifOperStatus | grep down | grep -v ".51" |  awk -F '[. ]'  '{print $2}'`
echo "$pd" > /tmp/pd_$host_ip
#echo "Port admin down list:"
ad=`$COMMAND  IF-MIB::ifAdminStatus | grep down | awk -F  '[. ]' '{print $2}'` 
echo "$ad" > /tmp/ad_$host_ip
re=`diff  /tmp/pd_$host_ip /tmp/ad_$host_ip | grep "<" | awk '{print $2}'`
if [ "$re" = "" ]; then
echo "It seems to be OK!"
exit 0
else 
echo "Warning, these port down has recently down, plz check them: "
#x=`echo "$re" `
for i in $re 
do 
alias=`$COMMAND IF-MIB::ifAlias.$i | awk '{print $4 $5}'`
descr=`$COMMAND IF-MIB::ifDescr.$i | awk '{print $4 $5}'`
echo "$descr $alias"
done 
exit 2
fi

This script is writen as a nagios plugin to check switch's port state. Has been tested and work properly with some cisco and juniper devices.