I'm basically fishing in the dark here, but maybe the following will work. Note how it's not passing a literal constant to ->cmd() anymore, it passes the (modifiable) elements of an array. It's the only spot I can think of; if that's not it, you probably have to contact the module author. 
use strict;
use Net::Telnet::Cisco;

open my $log, '>', 'logfile'
    or die "Cannnot open log file : $!\n";
open my $seed, '<', 'seedfile'
    or die "Cannot open seed file : $!\n";

my @commands =('show line aux 0');

while(<$seed>) {
    chomp;
    my $Telnet = Net::Telnet::Cisco->new(Host => $_)
        or die "Cannot open session to '$_': $!\n";
    $Telnet->login(Name => 'user', Password => 'pass')
        or die "Cannot log into device '$_': $!\n";
    print $log "$_\n", $Telnet->cmd($_), @commands;    
}

[download]

Makeshifts last the longest.

In reply to Re^5: Cisco Telnet by Aristotle
in thread Cisco Telnet by CongoGrey

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