blc6450vpt1>en
Password: 
blc6450vpt1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
blc6450vpt1(config)#interface ethernet 1
blc6450vpt1(config-if-eth)#

##</code><code>##

#!/usr/bin/perl
## modules to use
use strict;
use warnings;
use Net::Telnet;
use Data::Dumper;
#$|++;
#
## establish some global variables
my $HOSTNAME = "10.2.200.10";
my $HOSTPORT = "2033";
my $input_file  = 'input.log';
my $output_file = 'output.log';
my $option_file = 'option.log';
my $dump_file   = 'dump.log';

my $conn = new Net::Telnet ( 
	  Timeout                  => "3",
	  Errmode 		           => \&error_sub,
	  #Errmode 		           => "return",
      #Dump_Log                 => $dump_file,
      Input_log                => $input_file,
      #Option_log               => $option_file,
      #Output_log               => $output_file,
      Output_record_separator  => "",
      Prompt                   => '/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/'
      
);

# open connection to host $HOSTNAME and port $HOSTPORT
# and die if there is a problem
unless ($conn->open(Host => $HOSTNAME, Port => $HOSTPORT))
{
    die "Error opening socket:: ".$conn->errmsg();
}

print "Connected to ".$conn->host().", port ".$conn->port()."\n";
# Force the password prompt to be displayed by sending a ^M
$conn->print("
");
$conn->waitfor('/Password:/');
$conn->print("password\n");               
#Regex to match most IOS devices
$conn->waitfor('/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/');
$conn->cmd("term length 0\n");
$conn->waitfor('/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/');
$conn->cmd("term  width 120\n");
$conn->waitfor('/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/');
my @num = $conn->cmd(String => "show clock\n",
                           Prompt => '/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/');
print Dumper(\@num);
print STDERR Dumper(\@num);
my @output = ();
$conn->print("show version\n");
my (undef, $process_string) = $conn->waitfor('/(?m:^[\w.-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/');
print $process_string . "\n";
print STDERR $process_string;
print Dumper($process_string);

sub error_sub{
    my $error = shift;
    print "Made it to error method " . Dumper($error, \@_);
}

##</code><code>##

[prompt]$./Net_Telnet_console.pl 
Connected to 10.2.200.10, port 2033
Made it to error method $VAR1 = 'pattern match timed-out';
$VAR2 = [];
Made it to error method $VAR1 = 'command timed-out';
$VAR2 = [];
Made it to error method $VAR1 = 'pattern match timed-out';
$VAR2 = [];
Made it to error method $VAR1 = 'command timed-out';
$VAR2 = [];
Made it to error method $VAR1 = 'pattern match timed-out';
$VAR2 = [];
Made it to error method $VAR1 = 'command timed-out';
$VAR2 = [];
$VAR1 = [];
Made it to error method $VAR1 = 'pattern match timed-out';
$VAR2 = [];

##</code><code>##


Test]$ cat input.log 

Password: 
blc6450vpt1>term length 0
blc6450vpt1>term  width 120
blc6450vpt1>show clock
*13:35:28.043 PST Sat Aug 21 2010
blc6450vpt1>show version
......don't need to paste the rest