Greets,

I am trying to right a series of scripts to map out all of our *nix hosts on our intranet, in order to ease administration. One part of that script requires that I ping each address. Problem is, if the subnet doesn't exist, I don't want to ping 255 addresses only to find nothing.

I wrote a perl script to ping the broadcast address (using Net::Ping) but it comes back that the address doesn't exist (even though a command line ping does).

Am I doing something incorrectly here, or does Net::Ping not work for pinging broadcast addresses? I have tried w/ and w/o ICMP, again, to no avail.

For information purposes, here is the script: 

#! /usr/local/bin/perl -w

use strict;
use Net::Ping;

my $IPBlk;
my $FirstOctets = "10.0";
my $ThirdOctet;

for ($ThirdOctet = 1; $ThirdOctet <= 25; $ThirdOctet++) {
    $IPBlk = "$FirstOctets." . "$ThirdOctet";
    my $sbnt = "$IPBlk" . ".0";
    my $p = Net::Ping->new();
    if ($p->ping("$sbnt") ) {
        print "host exists\n";
    } else {
        print "Host does not exist\n";
    }
    print "$?\n";
}

[download]

Many thanks in advance,

Joe

In reply to Using Net::Ping for broadcast address by birdbrane

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