check snmp ports status

get-port-status-snmp.sh

#!/bin/bash

if [ -z "$2" ]; then
	echo Usage: "$0" hostname community
	exit 4
fi

srv="$1"
com="$2"
snmp="snmpget -v 2c -c $2 -Cf -Ov -OQ $srv"

numports=`$snmp IF-MIB::ifNumber.0`

for i in `seq 1 $numports`; do
	name=`$snmp IF-MIB::ifAlias.$i`
	if [ "$name" = "No Such Instance currently exists at this OID" ]; then
		continue
	fi

	iftype=`$snmp IF-MIB::ifType.$i`

	if [ "$iftype" = "other" ] || [ "$iftype" = propVirtual ] || [ "$iftype" = softwareLoopback ]; then
		continue
	fi 
	
	status=`$snmp IF-MIB::ifOperStatus.$i`
	port=`$snmp IF-MIB::ifDescr.$i`
	if [ -z "$name" ]; then
		if ! [ $status = 'down' ]; then
			badoutput="$badoutput, $port is $status and should be down"
		fi
		continue
	else
		fulloutput="$fulloutput, $port:$name is $status"
		if ! [ $status = 'up' ]; then
			badoutput="$badoutput, $port:$name is $status"
		fi
	fi
done

fo=`echo "$fulloutput"|sed 's/^, //;s/RMON Port //g'`
bo=`echo "$badoutput"|sed 's/^, //;s/RMON Port //g'`

if [ -z "$badoutput" ]; then
	echo "OK; $fo"
	exit 0
else
	echo "CRITICAL; $bo"
	exit 2
fi