As Anonymous Monk has already told you, the login phase is managed by the module and what you get from open2pty is not the login prompt but a shell on the remote device.

Anyway, usually, the following hack works: 

my $ssh = Net::OpenSSH->new("$username:$password\@$ip", timeout => 30)
+;
$ssh->error and die "unable to connect to remote host: ". $ssh->error;

my $out = $ssh->capture({stdin_data => "show ip arp\n"});

[download]
It just starts a remote shell, pipes the command through its stdin and captures the output.

If that doesn't work, you will have to revert to Expect. Running the following one-liner from the command line will allow you to interact with the remote shell as returned by open2pty so you can experiment with it and see what you should expect. 

perl -MNet::OpenSSH -e 'Net::OpenSSH->new(q(USER:PASSWD@HOST))->system
+({tty=>1})'

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In reply to Re: Problems with Net::OpenSSH by salva
in thread Problems with Net::OpenSSH by aeaton1843

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