Thanks for your answer, but I already tryed with expect.. look at this :

When I use this :

        print ("login : @switch_details[4] \n");
                print ("password : @switch_details[3]\n");

        
           my $ssh = Net::SSH::Expect->new (
            host => @switch_details[1], 
            password=> @switch_details[3], 
            user => @switch_details[4], 
            raw_pty => 1
        );
        
        my $login_output = $ssh->login();
[download]

My login & password are good..

what happens when you try to run the same command from the command line?

$ ssh -vvv user@your.switch upload cfg_toTFTP ...
[download]

Hello, I finally found a way :)

sub Recup_dlink_DGS {
        my $ssh = Net::SSH::Expect->new (
        host     => @switch_details[1],
        user     => @switch_details[4],
        password => @switch_details[3],
        raw_pty  => 1,
        timeout  => 5);
        
        eval {
        my $login_output = $ssh->login();
        if ($login_output !~ /Welcome/) {
            die "=> Echec à l'identification \n=> $login_output";
        }
}
        
$ssh->exec("upload cfg_toTFTP $serveur_tftp @switch_details[2]");
        &controle_cfg;
        return 1;
}
[download]

Thanks, I would not find it without your help. Many thanks ;)

Have u got any fix for the question as i too getting same error

linux1642: Verifying server signature. linux1642: Waiting for NEWKEYS message. linux1642: Enabling incoming encryption/MAC/compression. linux1642: Send NEWKEYS, enable outgoing encryption/MAC/compression. linux1642: Sending request for user-authentication service. linux1642: Service accepted: ssh-userauth. linux1642: Trying empty user-authentication request. linux1642: Authentication methods that can continue: password,publickey,keyboard-interactive. linux1642: Next method to try is password. linux1642: Trying password authentication. linux1642: Authentication methods that can continue: password,publickey,keyboard-interactive. linux1642: Next method to try is password. linux1642: Trying password authentication. linux1642: Authentication methods that can continue: password,publickey,keyboard-interactive. linux1642: Next method to try is password. linux1642: Trying password authentication. Received disconnect message: Too many bad authentication attempts! at /usr/lib/perl5/site_perl/5.8.5/Net/SSH/Perl/AuthMgr.pm line 143

can any one help on this as most of times not connecting , but rarely connecting.