自己搭建自動化巡檢系統（三） 通過telnet實現遠程建立loopback

標籤：telnet   loopback   

我們在上一章完成了用代碼操作telnet，實現了遠端控制，分析前面的代碼會發現健壯性太低，需要進行最佳化，後續會通過開發一個互動式介面來完成人工介入操作網路的過程。本次實驗目的：實現自動化建立環回口

首先更新拓撲，拉出新的路由器和一台交換器

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import telnetlib

import time

def main():

         Host="192.168.10.100"

         username="yerik"

         password="1111"

         commends=[‘enable‘,‘2222‘,‘conft‘]#相關指令

        

         tn= telnetlib.Telnet(Host,port=23,timeout=10)

         tn.set_debuglevel(2)

 

         #login input username

        

         tn.read_until(‘Username:‘) # 期待回複

         tn.write(username+‘\n‘)

 

         #input password

         tn.read_until(‘Password:‘) # 期待回複

         tn.write(password+‘\n‘)

 

         tn.read_until(‘R1>‘)

         forcommend in commends:

                   tn.write("%s\n"% commend)

         ‘‘‘

         tn.read_until(‘R1#‘)

         tn.write(‘configure‘)

         time.sleep(1)

         tn.write(‘t‘)‘‘‘

 

         tn.read_until(‘R1(config)#‘)

         loopback= ‘int lo‘

         ipaddr= ‘ 255.255.255.255‘

         exit= ‘exit‘

         fori in range(1,5):

                   loopbackn=loopback+str(i)

                   time.sleep(1)

                   tn.write("%s\n"% loopbackn)

                   ipaddrn=‘ipadd ‘+str(i)+‘.‘+str(i)+‘.‘+str(i)+‘.‘+str(i)+ipaddr

                   time.sleep(1)

                   tn.write("%s\n"% ipaddrn)

                   time.sleep(1)

                   tn.write("%s\n"% exit)

         tn.close()

 

if __name__==‘__main__‘:

         main()

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發現已經建立成功了

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由於此時還沒有運行路由協議，請問有什麼辦法可以ping到這些環回口？使用ping中的嚴格來源站點路由技術，通過R2pingR1 在特權介面中，輸入ping

ping

Protocol [ip]:

Target IP address: 2.2.2.2

Repeat count [5]:

Datagram size [100]:

Timeout in seconds [2]:

Extended commands [n]: y

Source address or interface: 192.168.10.102

Type of service [0]:

Set DF bit in IP header? [no]:

Validate reply data? [no]:

Data pattern [0xABCD]:

Loose, Strict, Record, Timestamp, Verbose[none]:Strict

Source route: 192.168.10.101

Loose, Strict, Record, Timestamp,Verbose[SV]:

Sweep range of sizes [n]:

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2.2.2.2,timeout is 2 seconds:

Packet sent with a source address of192.168.10.102

Packet has IP options:  Total option bytes= 7, padded length=8

 Strict source route: <*>

  (192.168.10.101)

 

Reply to request 0 (20 ms).  Received packet has options

 Total option bytes= 8, padded length=8

 Strict source route:

  (192.168.10.101)

  <*>

 Endof list

 

Reply to request 1 (28 ms).  Received packet has options

 Total option bytes= 8, padded length=8

 Strict source route:

  (192.168.10.101)

  <*>

 Endof list

 

Reply to request 2 (24 ms).  Received packet has options

 Total option bytes= 8, padded length=8

 Strict source route:

  (192.168.10.101)

  <*>

 Endof list

 

Reply to request 3 (16 ms).  Received packet has options

 Total option bytes= 8, padded length=8

 Strict source route:

  (192.168.10.101)

  <*>

 End oflist

 

Reply to request 4 (28 ms).  Received packet has options

 Total option bytes= 8, padded length=8

 Strict source route:

  (192.168.10.101)

  <*>

 Endof list

 

Success rate is 100 percent (5/5),round-trip min/avg/max = 16/23/28 ms

現實可以ping通

本文出自 “yerik” 部落格，轉載請與作者聯絡！

自己搭建自動化巡檢系統（三） 通過telnet實現遠程建立loopback