Munin contributed plugins

#!/bin/sh

#

# Plugin to monitor total ARP entries

#

#  Parameters understood:

#

#      config   (required)

#      autoconf (optional)

#

#  Made by Sven Hartge (sven AT svenhartge DOT de)

#

#%# family=contrib

#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then

    # Search for arp

    which arp >/dev/null 2>/dev/null || (echo "no (can't find arp binary)" && exit 1)

    # ...or success

    echo yes

    exit 0

fi

if [ "$1" = "config" ]; then

        echo 'graph_title ARP entries'

        echo 'graph_args --base 1000 -l 0'

        echo 'graph_vlabel Entries'

        echo 'graph_category network'

	echo 'graph_scale no'

        echo 'graph_info This graph shows the number of ARP entries registered by the system.'

	echo 'entries.label ARP entries'

	echo 'entries.draw LINE2'

	echo 'entries.type GAUGE'

	echo 'entries.info Number of ARP entries'

	exit 0

fi

arp -an | awk 'BEGIN { regex="<incomplete>";} { if (!match($4,regex)) { a[$4] }} END{for(i in a){n++};print "entries.value " n}'

    # Search for arpwatch

	echo 'entries.draw STACK'

echo -n "entries.value "

arp -an | wc -l