use strict;
use Data::Dumper;
use Net::SNMP;

my ($session, $error) = Net::SNMP->session(
      -hostname  => shift || 'localhost',
      -community => shift || 'public',
      -port      => shift || 161 
);

if (!defined($session)) {
    printf("ERROR: %s.\n", $error);
    exit 1;
}

my $sysUpTime = '1.3.6.1.2.1.1.3.0';

my $result = $session->get_request(
      -varbindlist => [$sysUpTime]
);

if (!defined($result)) {
    printf("ERROR: %s.\n", $session->error);
    $session->close;
    exit 1;
}

printf("sysUpTime for host '%s' is %s\n",
       $session->hostname, $result->{$sysUpTime} );

#print Dumper($result);
$session->close;

exit 0;