编写Python脚本通过telnet配置路由设备

浅浅的花香味﹌ 2022-02-28 03:24 359阅读 0赞

# 编写Python脚本通过telnet配置路由设备 #

自己对于交换机方面不是很懂，但是发现python中有个库为telnetlib，就索性拿来用用。

参考telnetlib配置文档：[https://docs.python.org/3/library/telnetlib.html][https_docs.python.org_3_library_telnetlib.html]

## 一、所需环境 ##

python3

## 模拟环境一： ##

未运行脚本之前，有两个设备的ip分别为172.14.1.4和172.14.2.5，均没有到1.1.1.1和2.2.2.2的路由

### 编写两个配置文档： ###

conf.txt:

ip route 1.1.1.1 255.255.255.255 f0/0

ip.txt：

172.14.1.4

172.14.2.5

### python脚本文件 ###

#conf.py 文件
    
    import time
    
    from telnetlib import Telnet
    
    def cfg(addr,user,pwd,secret,conf):
    
     tn = Telnet(addr)
    
     tn.write(user+'\n')
    
     tn.write(pwd+'\n')
    
     tn.write('enable\n')
    
     tn.write(secret+'\n')
    
     tn.write('terminal length 0\n')
    
     time.sleep(1)
    
     tn.write('conf t\n')
    
     time.sleep(1)
    
     confp = open(conf,'r')
    
     for cmd in confp:
    
     tn.write(cmd)
    
     print(cmd)
    
     time.sleep(1) #建议每条命令都休眠一下，不然可能配置不了
    
     confp.close()
    
    if name == "main":
    
     fp = open('./ip.txt','r') #如果有多台主机要配置同样的命令的话，可以将主机IP都放在一个文档中
    
     for ip in fp:
    
     print("configuring "+ip.strip())
    
     conf = cfg(ip.strip(),'username','password','secret','./conf.txt')
    
     print(ip.strip()+' was finished!')
    
     print('done!')
    
     fp.close()

## 模拟环境二： ##

运用多线程对多个ip的交换机进行连接

需要把ip写入当前文件下的ip.txt中

### python脚本 ###

import telnetlib,threading
    
    ipfile = open('ip.txt')
    
    ipall = [ ip.strip('\n') for ip in ipfile.readlines() ]
    
    def get_mac(ip):
    
     try:
    
     tel = telnetlib.Telnet(ip)
    
     tel.read_until('Username:')
    
     tel.write('username'+'\n')
    
     tel.read_until('Password:')
    
     tel.write('password'+'\n')
    
     tel.read_until('>')
    
     tel.write('dis mac-add ' + mac +'\n')
    
     data = tel.read_until('>')
    
     if 'sticky' in data:
    
     print ('telnet '+ ip)
    
     print (data)
    
     print (ip,'done')
    
     except:print ('can not connect to %s' %ip)
    
    threads = []
    
    numbers = range(len(ipall))
    
    mac = input('input mac add ,like => aabb-ccdd-eeff \n >')
    
    for i in numbers:
    
     t = threading.Thread(target=get_mac,args=(ipall[i],))
    
     threads.append(t)
    
    
    
    if name == 'main':
    
     for i in numbers:
    
     threads[i].start()
    
    
    
    print ('all done')

[https_docs.python.org_3_library_telnetlib.html]: https://docs.python.org/3/library/telnetlib.html