network snmp check

Snmp is an network monitoring system. Many types of network equipment can be configured to provide snmp information, such as :

• Uptime
• Network Interface Descriptions and Types
• Input and Output errors per interface
• Routing Information
• TCP and UDP connection information
• and much more
  

a sample of snmptrap alarm script :

#!/bin/sh

TRAPHOST=10.4.8.56
TRAPCOMMUNITY=public
TRAPTIME=`date +%s`

usage()
{
   echo " server alarm sender"
   echo "usage:    $0     "
   echo ""
}

case $# in 
  5)
      PROG=$1
      PID=$2
      LEVEL=$3
      FUNC=$4
      MSG=$5
      ;;
   *)
      usage
      exit 1
esac      

if [ $# -eq 5 ] ; then
/usr/local/bin/snmptrap -v 2c $TRAPHOST $TRAPCOMMUNITY '' \
        server.alarm.0.$LEVEL          \
        alarmHost     s "`hostname` " \
        alarmTime     t "$TRAPTIME"   \

replace the bold TRAPHOST IP address and "server" with the expected IP and hostname.