Not sure about better ..

#!/usr/bin/perl
use warnings;
use strict;
use Data::Dumper;

my @AoH; my $rec;
my $re = join '|'
  ,'(?<k>ether)\s+(?<v>.*$)'
  ,'(?<k>media):\s+(?<v>\w+)'
  ,'(?<k>inet)\s+(?<v>\w+\.\w+\.\w+\.\w+)'
  ,'(?<k>status): (?<v>\w+)'
  ,'(?<k>broadcast)\s+(?<v>\w+\.\w+\.\w+\.\w+)'
  ,'(?<k>netmask)\s+(?<v>\w+)'
  ,'(?<k>mtu)\s+(?<v>\d+)'            
  ,'(?<k>prefixlen)\s+(?<v>\d+)';

open my $fh, '<', 'interface.txt' or die;  
while (<$fh>) {
  chomp;
  if (/^(\w+\d{1}):\s+flags=(.*?>)/){
    $rec = {};
    push @AoH, $rec;
    $rec->{'interface'} = $1;
    $rec->{'flags'} = $2;
  }
  while (/$re/g) {
    $rec->{$+{k}} = $+{v};
  } 
}
close $fh;
print Dumper \@AoH;
[download]