Yes, I have posted the wrong code!!!! It really has been very long day/night.

Your code works, but how can I combine 2 loops into one? What I mean is this

#! c:/perl/bin/perl.exe

use strict;

my ($Rec2, $pc_name);
my ($hash,$key);

open (LST,"c:/showtech".$ARGV[0].".txt") || die "$!\n";

while(<LST>) 
{  
    $key = $1, next if (/interface port-channel (\d+)$/);
    $hash->{$key}->{$1} = $2 if (/switchport description To (\w+) ([\d
+\.]+)/);
}
close LST;

open (LST,"c:/showtech".$ARGV[0].".txt") || die "$!\n";
while(<LST>) 
{
    $pc_name = $1, next if (/(port-channel \d+)$/);
    $Rec2->{$pc_name}->{$1} = $2 if (m|(fc\d+/\d+)\s+\[(\w+)\]|);
}
for my $data (keys %{$Rec2})
{
    print "\n$data \n";
}   

for my $data (keys %{$hash})
{
    print "$data\n";
}
[download]

I am sure I don't have to open the file twice. but not sure on how to do it. If I merge both loops then only one loop works!