Python backs up configuration of network devices via Telnet

This experiment uses the Telnetlib library
First, the topology


Second, the environment
Python 2, Cisco-router, Kali-linux

Third, the configuration
！！ Scripts and IP address files are in the same directory
3.1. IP Address

3.2. Python Backup Script

#backup.pyimport timefrom telnetlib import Telnetdef tel(addr,user,pwd,secret):        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‘)#将show run的内容一次性全部显示完        time.sleep(1)        tn.write(‘show run\n‘)        time.sleep(1)        rsp = tn.expect([],timeout=1)[2]        return rspif __name__ == "__main__":        fp = open(‘./ip.txt‘,‘r‘)        for ip in fp:          print("backing up "+ip.strip())          conf = tel(ip.strip(),‘cisco‘,‘cisco‘,‘cisco‘) #第一个cisco 是账户，第二个Cisco是密码，第三个Cisco是enable密码          print(ip.strip()+‘ was finished!‘)          print(conf)#这里是用于查看函数返回的内容，可以删除          fw = open(ip.strip(),‘w‘)#每台主机的配置以IP地址为文件名，建议先使用OS模块创建一个目录，然后将所有配置放到目录下          fw.write(conf)          fw.close()        print(‘done!‘)        fp.close()

The effect is as follows:

Python backs up configuration of network devices via Telnet