#! /usr/bin/perl

use strict ;
use warnings ;
use XML::Simple ;
#use Data::Dumper ;

my $xml = <<'EOD' ;
<network>
<node name="edge1">
<community>something</community>
<loopback>172.16.254.10</loopback>
</node>
<node name="edge2">
<community>anotherthing</community>
<loopback>10.6.21.10</loopback>
<loopback>10.12.71.14</loopback>
</node>
</network>
EOD

my $data = XMLin( $xml, forcearray => 1 ) ;
#print Dumper( $data ) ;

foreach my $key ( keys %{$data->{'node'}} )
{
    foreach my $loopback ( @{$data->{'node'}{$key}{'loopback'}} )
    {
        print "key = $key; loopback = $loopback\n" ;
    }
}