#! /usr/bin/python

import getpass
import sys
import telnetlib

HOST = "IP DEL ROUTER"
user = "USUARIO DEL ROUTER"
password = "CONTRASEÑA DEL ROUTER"
tn = telnetlib.Telnet(HOST)

tn.read_until("Login: ")
tn.write(user + "\n")
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")

tn.write("save_and_reboot\n")
tn.write("exit\n")

print tn.read_all()