#!/usr/bin/env python
#load this script using the start-on-boot parameter in
#order to back up the switch each time the switch reloads
import telnetlib
import os
import re
import time
import string
import sys
HOST = '127.0.0.1'
PORT = 23
LOGIN_STRING = "Login:"
PASSWORD_STRING = "Password:"
TERMINAL_LEN_ZERO = "terminal length 0\n"
TERMINAL_MONITOR = "terminal monitor\n"
ENABLE_STRING = "enable\n"
CONFIG_STRING = "configure\n"
USERNAME = 'admin'
PASSWORD = 'password'
ENABLE_PASSWORD = ''
TIMEOUT = 3
def do_terminal_settings(tn):
15 Python Scripting for Dell Networking N-Series | Version 1.0.1
 tn.write(TERMINAL_MONITOR)
 tn.read_until("#")
 tn.write(TERMINAL_LEN_ZERO)
 tn.read_until("#")
def do_login(tn):
 tn.read_until(LOGIN_STRING, TIMEOUT)
 tn.write(USERNAME + "\n")
 tn.read_until(PASSWORD_STRING, TIMEOUT)
 tn.write(PASSWORD + "\n")
 tn.read_until(">", TIMEOUT)
 tn.write(ENABLE_STRING)
 tn.read_until("#", TIMEOUT)
#Replace the “xx.xx.xx.xx” below with the TFTP server IP address
def do_config(tn):
 tn.read_until("#", TIMEOUT)
 tn.write("copy running-config tftp://xx.xx.xx.xx/running-configuration\n");
 tn.read_until("(y/n)", TIMEOUT)
 tn.write("y");
 tn.read_until("#", TIMEOUT)

def main():
 telnet = telnetlib.Telnet(HOST,PORT)
 do_login(telnet)
 do_terminal_settings(telnet)
 do_config(telnet)
 telnet.close()
 sys.exit(0)
main()