#! /usr/bin/perl -- -*-perl-*->

$LatencyLimit=500.0; # msecs.

$FAILFLAG='YES'; # Handle the case when ping returns nothing.
foreach $_ (`ping -c 10 -i 2  servername.net`) 
{
   $output=$output.$_;
   ($when)=/time=(\d+\.?\d)\sms/;
   if ($when  < $LatencyLimit && $when > 10.0) {$FAILFLAG='NO';}
}

if ($FAILFLAG eq 'YES')
 {
   open (EMAIL, "|`/usr/sbin/sendmail address1\@email.com address2\@momail.com`");
   print EMAIL
"From: My Name <mymail\@email.com>\
Subject: PING to servername.net fails.\
This is My Name <mymail\@email.com>.\

I'm having a network problem. My connection latency is over $LatencyLimit msecs. (or completely fails).\

This situation is so catastophic I had to reset my interface in order to restore normal operation.\
 \n";
   print EMAIL "$output";
   close(EMAIL);
 }