Hi, The regexp that is evaluating the prompt doesn't include the characters ":" and "/" that are present in your router names. So you have to alter the regexp used for the prompt. If you create the Net::Telnet::Cisco object "$obj" you can see what regexp is used with   print $obj->prompt, "\n"; And alter it with   $obj->prompt('/(?m:^[\w.:\/-]+\s?(?:\(config[^\)]*\))?\s?[\$#>]\s?(?:\(enable\))?\s*$)/'); The regexp I used above includes your special characters. So that should work.