Ok I got it going somehow, now it uses temp files but it works :-) Here it is my first prog :-).

#!/usr/bin/perl -w

use Net::SNMP;
#use strict;
use warnings;
use diagnostics;
                                                                      
          
open IPFILE, "ipfile.txt" or die "Can't get IPs - $!\n";

    

                                                                      
          
my $community = 'public';
my $ifIndex   = '1.3.6.1.2.1.47.1.1.1.1.6';  #1.3.6.1.2.1.2.2.1.1     
+ 1.3.6.1.2.1.47.1.1.1.1.12
my $ifDescr   = '1.3.6.1.2.1.47.1.1.1.1.11';  #1.3.6.1.2.1.47.1.1.1.1.
+13
my $ifDescr2   = '1.3.6.1.2.1.47.1.1.1.1.2';  #1.3.6.1.2.1.47.1.1.1.1.
+13



          
while ( my $ip = <IPFILE> )
{
    chomp $ip;
    print "Got: $ip\n";                                               
+                   

    my ( $session, $error ) = Net::SNMP->session(
        -hostname  => $ip,
        -community => $community,
        -port      => 161
    );
    my $response;
                                                                      

    if ( defined( $response = $session->get_table($ifIndex) ) )
    {
        foreach my $index ( values  %{$response} ) #values
        {
        my $this_desc = "$ifDescr.$index";
            my $description;
            if ( defined( $description = $session->get_request($this_d
+esc) ) )
            {
           
            my @serial = values %{$description};
          open OUTPUT1, ">>serlist.txt";
          print OUTPUT1 @serial, "\n";
          close OUTPUT1;
    
        }
        }
        foreach my $index ( values  %{$response} ) #values
        {
        my $this_desc = "$ifDescr2.$index";
            my $description2;
            if ( defined( $description2 = $session->get_request($this_
+desc) ) )
            {
            my @desc = values %{$description2};
            open OUTPUT2, ">>desclist.txt";
            print OUTPUT2 @desc, "\n";
            close OUTPUT2;
           
            }
               
       
    }   
    
    
    open(OUT, "serlist.txt");
    open(OUT2, "desclist.txt");
    my @outlist;
    while (<OUT>)
        {
        my %hash;
        my @temp = split(/;/,$_);
        $hash{'file1'} = $temp[0];
        $hash{'file2'} = <OUT2>;
        
        #Return entfernen
        foreach (values %hash)
            {
            $_ =~ s/\n//g;
            }
        push(@outlist,\%hash);
        }
    close(OUT);


    open FINOUT, ">>finallist.txt";
    print FINOUT "$ip\n"; 
    foreach my $hashref (@outlist)
    {
        print FINOUT "$hashref->{'file1'};$hashref->{'file2'}\n";
    }
    print FINOUT "\n";    
    close FINOUT;
    }
    
    $session->close();
}
[download]

... maybe you have an idea to do it without those temps.

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