(mpls ldp)
 (router-id) ([^\n]+)
 nsr
 graceful-restart
 backoff 5 10
 session protection
 (neighbor) ([^\n]+) password encrypted [^\n]+
 (neighbor) ([^\n]+) password encrypted [^\n]+
 (neighbor) ([^\n]+) password encrypted [^\n]+
 igp sync delay 10
 label
  allocate for LLAF
 !
 log
  neighbor
  nsr
 !
 interface ([^\n]+)
 !
 interface ([^\n]+)
 !
 !                

##</code><code>##

      while (@MASK_VARIABLES = $current_cfg =~ /$mask_tmp/s) {
         $MASK_VARIABLES = join(",",@MASK_VARIABLES);
         $MASK_SEEN{$hostname}{$mask} = "YES";
         $MASK_COUNT{$hostname}{$mask}++;
         #
         ($MASK_VARIABLES[1] =~ /\w+/) && do {
            print "$hostname,$MASK_VARIABLES\n";
         };
         #
         # remove identified cfg section from router configuration
         #
         $current_cfg =~ s/$mask_tmp//s;
      }