Python learning for Network Engineers | Part 12 | Open file for cisco configuration

𝗙𝗼𝗿 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗣𝘆𝘁𝗵𝗼𝗻 𝗙𝗼𝗿 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀 𝗖𝗼𝘂𝗿𝘀𝗲:
𝗘𝗻𝗿𝗼𝗹𝗹 𝗳𝗼𝗿 𝗯𝗲𝗹𝗼𝘄 𝗨𝗱𝗲𝗺𝘆 𝗖𝗹𝗮𝘀𝘀: 𝟐𝟎𝟐𝟐 𝐕𝐞𝐫𝐬𝐢𝐨𝐧
𝑫𝒊𝒔𝒄𝒐𝒖𝒏𝒕𝒆𝒅 𝑹𝒆𝒇𝒆𝒓𝒓𝒂𝒍 𝑳𝒊𝒏𝒌:
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This video demnstrates how to read a file to get list of devices .
Open file to read/write /append get the configuration of cisco.
Explains about 'with' statement.
import paramiko
import time
from getpass import getpass

username = 'admin'
password = 'admin'

DEVICE_LIST = open ('09_devices')
for RTR in DEVICE_LIST:
print ('\n #### Connecting to the device ' + RTR.strip() + '####\n' )
SESSION = paramiko.SSHClient()
SESSION.set_missing_host_key_policy(paramiko.AutoAddPolicy())
SESSION.connect(RTR,port=22,
username=username,
password=password,
look_for_keys=False,
allow_agent=False)

DEVICE_ACCESS = SESSION.invoke_shell()
COMMANDS = open ('09_config')
for LINES in COMMANDS:
DEVICE_ACCESS.send(str(LINES))

output = DEVICE_ACCESS.recv(65000)

SESSION.close

#PythonOpenfile
#PythonOpenReadWriteAppend
#PythonCiscoConfiguration

[chrissharp]

For starters, thank you so much for the videos. They have been extremely helpful.

Second: I spent about an hour running into the below error when trying to connect to devices from a list. In the next video it's explained that you need the .strip() in the SESSION.connect in the field denoting the device. The .strip() removes any leading or trailing spaces in the text file you're calling out with the devices in it. Hope this saves someone a bit of time. See my config below.

.PS C:\Users\xxxx\Desktop\Python> python textfileforconfig.py

#### Connecting to the device 10.106.1.11####

Traceback (most recent call last):
File "textfileforconfig.py", line 19, in <module>
allow_agent=False)
File line 334, in connect
to_try = list(self._families_and_addresses(hostname, port))
File line 204, in _families_and_addresses
hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM
File line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed




DEVICE_LIST = open ('test.txt')
for RTR in DEVICE_LIST:
print ('\n #### Connecting to the device ' + RTR.strip() + '####\n' )
SESSION = paramiko.SSHClient()

SESSION.connect(RTR.strip(), port=22,
username=username,
password=password,
look_for_keys=False,
allow_agent=False)

[NetworkEvolution]

𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗣𝘆𝘁𝗵𝗼𝗻 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗳𝗼𝗿 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀(𝟭𝟮𝟬+ 𝗩𝗶𝗱𝗲𝗼𝘀)
☸𝗣𝗹𝗲𝗮𝘀𝗲 𝗳𝗼𝗹𝗹𝗼𝘄 𝗯𝗲𝗹𝗼𝘄 𝗚𝗶𝘁𝗛𝘂𝗯 𝗣𝗮𝗴𝗲 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗹𝗮𝘁𝗲𝘀𝘁 𝗰𝗼𝗱𝗲𝘀:
𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗖𝗶𝘀𝗰𝗼 𝗡𝗫𝗔𝗣𝗜-𝗖𝗟𝗜 𝗣𝘆𝘁𝗵𝗼𝗻 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: 𝗡𝗲𝘅𝘂𝘀 𝟵𝗸 :𝗣𝗮𝗿𝘀𝗲 𝗷𝘀𝗼𝗻 𝗫𝗠𝗟 𝗖𝗼𝗻𝗳𝗶𝗴𝘂𝗿𝗮𝘁𝗶𝗼𝗻 𝗗𝗮𝘁𝗮
𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗟𝗲𝗮𝗿𝗻 𝘁𝗼 𝗣𝗮𝗿𝘀𝗲 𝗖𝗶𝘀𝗰𝗼 𝗖𝗼𝗻𝗳𝗶𝗴𝘂𝗿𝗮𝘁𝗶𝗼𝗻 𝘂𝘀𝗶𝗻𝗴 𝗣𝘆𝘁𝗵𝗼𝗻 𝗥𝗲𝗴𝗘𝘅:𝗿𝗲 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹(𝟭𝟱+ 𝗩𝗶𝗱𝗲𝗼𝘀)
𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗖𝗶𝘀𝗰𝗼 𝗜𝗻𝘁𝗲𝗿𝗳𝗮𝗰𝗲 𝗖𝗼𝗻𝗳𝗶𝗴𝘂𝗿𝗮𝘁𝗶𝗼𝗻 𝗣𝗮𝗿𝘀𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗠𝘂𝗹𝘁𝗶𝘁𝗵𝗿𝗲𝗮𝗱𝗶𝗻𝗴 𝗣𝘆𝘁𝗵𝗼𝗻 𝗥𝗲𝗴𝗘𝘅 𝗦𝗰𝗿𝗶𝗽𝘁:𝗧𝗮𝗯𝘂𝗹𝗮𝘁𝗲 𝗧𝗮𝗯𝗹𝗲 𝗲𝘅𝗮𝗺𝗽𝗹𝗲(𝟰 𝗩𝗶𝗱𝗲𝗼𝘀)
𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗘𝗻𝗮𝗯𝗹𝗲 𝗣𝘆𝘁𝗵𝗼𝗻 𝗠𝘂𝗹𝘁𝗶𝘁𝗵𝗿𝗲𝗮𝗱𝗶𝗻𝗴 𝗶𝗻 𝗖𝗶𝘀𝗰𝗼 𝗖𝗼𝗻𝗳𝗶𝗴 𝗕𝗮𝗰𝗸𝘂𝗽 𝗦𝗰𝗿𝗶𝗽𝘁 𝗳𝗼𝗿 𝗣𝗮𝗿𝗮𝗹𝗹𝗲𝗹 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻:𝗧𝗵𝗿𝗲𝗮𝗱𝗶𝗻𝗴 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹(𝟰 𝗩𝗶𝗱𝗲𝗼𝘀)
𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁: 𝗔𝗻𝘀𝗶𝗯𝗹𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗙𝗼𝗿 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝘀 : 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝘁𝘂𝘁𝗼𝗿𝗶𝗮𝗹 𝘄𝗶𝘁𝗵 𝗖𝗶𝘀𝗰𝗼 𝗘𝘅𝗮𝗺𝗽𝗹𝗲𝘀(𝟯𝟬+ 𝗩𝗶𝗱𝗲𝗼𝘀)

[shaikbaji]

Very Informative Vedio Sir Thanks for en-lighting us

[shaikbaji]

Can you make a video on enabling different ports in different devices through telnet ??

[arshidrashid]

great work keep it up. Its really informative

[Born_for_a_reason]

Can you help m here
with open ('devices') as LIST:
for RTR in LIST:
print(RTR)


Traceback (most recent call last):
File "<pyshell#21>", line 1, in <module>
with open ('devices') as LIST:
FileNotFoundError: [Errno 2] No such file or directory: 'devices'

I m getting this error, its says no such dir but I have created devices text file and saved it

[prasaddesai]

Thank you for video series.
When i am running above code, getting socket.gaierror: [Errno-2] Name or service not know... Need your help to fix this error.