Plugin error: Remote cisco command via SSH not working

[Javier Castillo Alcibar]

Hello all,
 
I have some cisco routers that can only be managed using SSH. I wrote an
script, to do remotely some PING's from these routers, integrated in
nagios.

My problem is very strange:
	- if a execute this script from the command line by myself, it
works as expected.
	- if nagios process executes the script, it does not work. It
looks like ssh process didn't return anything....

I think it's a problem related with ttys.....but I'm not sure.

This is my (perl) script:

#!/usr/bin/perl
#
# Uso: usr/local/sbin/check_cisco_ping_ssh <host> <port> <user> <pass>
<ip> <warn-rate> <crit-rate>
#
use Net::SSH::Perl;

$router=$ARGV[0];
$port=$ARGV[1];
$user=$ARGV[2]; 
$pass=$ARGV[3]; 
$ip=$ARGV[4]; 
$warn=$ARGV[5]; 
$crit=$ARGV[6]; 

my $sesion_ssh = Net::SSH::Perl->new($router, protocol=>1,
cipher=>'DES', port=>$port); 
$sesion_ssh->login($user, $pass);

$command="ping $ip";

my($output, $output_error, $val_exit) = $sesion_ssh->cmd($command);

$output =~ /Success rate is (\d*) (.*)/;
$rate=$1;

if ( $rate <= $crit ) {
        print "PROBLEM: PING Rate=$rate%\n";
        exit 2;
}
if ( $rate <= $warn ) {
        print "WARNING: PING Rate=$rate%\n";
        exit 1;
}
if ( $rate <= 100 ) {
        print "OK: PING Rate=$rate%\n"; 
        exit 0;
}
exit 3;


Any help is welcome!!.

Thx in advance.
Regards
 
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