DA....Sorry for being a right pain in the back side...

I know we have been over this before, but I've decided to read the log files line at a time rather than slurping the whole thing, and then splitting it into an array in memory.

So, the following is my full code and data. 
#! c:/perl/bin/perl.exe
#
#
use strict;
use warnings;

# $/="*\n"; 

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


while (<DATA>) 
{
    $pc_name = $1, next if (/port-channel (\d+)$/); #line 14
    $Rec->{$pc_name}->{$1} = $2 if (m|(fc\d+/\d+)\s+\[(\w+)\]|); #line
+ 15    
    
    $key = $1, next if (/interface port-channel (\d+)$/); # line 17
    $hash->{$key}->{$1} = $2 if (/switchport description To (\w+) ([\d
+\.]+)/); #line 18
}

for my $data (keys %{$Rec}) 
{
   print "\nPort-Channel $data : \n";
   for my $data2 (keys %{$Rec->{$data}})
   {
      print "\t$data2\n";
   }      
}

for my $data (keys %{$hash}) 
{
   print "\nInterface Port-Channel $data : \n";
   for my $data2 (keys %{$hash->{$data}})
   {
      print "\t$data2\n";
   }      
}
     

__DATA__
port-channel 1
    Administrative channel mode is on
    Operational channel mode is on
    Last membership update succeeded
    First operational port is fc1/5
    2 ports in total, 2 ports up
    Ports:   fc2/5    [up]  
             fc1/5    [up] *

port-channel 3
    Administrative channel mode is on
    Operational channel mode is on
    Last membership update succeeded
    First operational port is fc1/1
    1 port in total, 1 port up
    Ports:   fc1/1    [up] *

interface port-channel 1
  switchport trunk allowed vsan 1000
  switchport trunk allowed vsan add 1050
  switchport description To CCC219 10.33.81.56
  switchport mode E

interface port-channel 3
  switchport trunk allowed vsan 1000
  switchport trunk allowed vsan add 1010
  switchport trunk allowed vsan add 1050
  switchport trunk allowed vsan add 1900
  switchport description To CCC215 10.33.81.52
  switchport mode E

[download]
My question is: why is it if I comment lines 14 and 15, then lines 17 and 18 will work, and vise versa. But if I uncomment all of the four lines, then I get this error: 
Use of uninitialized value in hash element at C:\Perl\test\mds1.pl
<DATA> line 21.
Use of uninitialized value in hash element at C:\Perl\test\mds1.pl
<DATA> line 29.

Port-Channel 1 :
        fc2/5
        fc1/5

Port-Channel 3 :
        fc1/1

Interface Port-Channel  :
        CCC215
        CCC219

C:\Perl\test>

[download]
Grateful for all your help my fellow Monks.

Blackadder

In reply to Why is it "While Regex"ing,...Things do NOT seem to work! by blackadder

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