switchloopfile.py - Telnet error

[martinhoeegh]

I'm getting an error when I try to run your script and can not figure out what's going wrong

$ python pythonR1script5.py

Enter your remote account: david
Password: cisco
Configuring Router 192.168.1.101

Traceback (most recent call last):
  File "pythonR1script5.py", line 13, in <module>
    tn = telnetlib.Telnet(HOST)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/telnetlib.py", line 211, in __init__
    self.open(host, port, timeout)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/telnetlib.py", line 227, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 557, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

The code:

import getpass
import sys
import telnetlib

user = raw_input("Enter your remote account: ")
password = getpass.getpass()

f = open ('myrouters')

for line in f:
    print "Configuring Router " + (line)
    HOST = line
    tn = telnetlib.Telnet(HOST)

    tn.read_until("Username: ")
    tn.write(user + "\n")
    if password:
        tn.read_until("Password: ")
        tn.write(password + "\n")

    tn.write("conf t\n")

    for n in range (0,2):
        tn.write("interface loopback " + str(n) + "\n")
        tn.write("ip address 1.1." + str(n) + ".2 255.255.255.0\n")

    tn.write("end\n")
    tn.write("exit\n")

    print tn.read_all()

[dazzy099]

@davidbombal I am getting the similar problem and error when running the for loop script using myswitch file any suggestion ?

Traceback (most recent call last):
File "diffip.py", line 13, in
tn = telnetlib.Telnet(HOST)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/telnetlib.py", line 211, in init
self.open(host, port, timeout)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/telnetlib.py", line 227, in open
self.sock = socket.create_connection((host, port), timeout)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 557, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

[sudharshans-s]

Port timeout is happening, can you normally telnet to the switches.

[Luck019]

Try using
HOST = line.strip()

It is working for me

[Mandeep4code]

Hello,

I am new to Python coding and was following David's video on this script.
Even I am getting the same error.

Tried changing the HOST = line.strip() but in vain.

Below is my code:

import getpass
import sys
import telnetlib
import socket

fd = open("C:\Users\user\Desktop\PYTHON\HOME\IP_List.txt")

for line in fd:
user = "mandeep"
password = "cisco"
print "Configuring Routers: " + (line)
HOST = line
tn = telnetlib.Telnet(HOST)

tn.read_until("Username: ")
tn.write(user + "\n")
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")
	
tn.write("term len 0\n")
tn.write("sh ip int brief \n")
tn.write("exit\n")

print tn.read_all()
#print (output)

#with open("Health.csv", "wb") as f:
#f.write(output)

[DilrajSK]

@Mandeep4code Check if it working with a single Host first.

[inggreg]

Hello, Guys
Try using this form:

It is working for me.

   import getpass
   import telnetlib
   import sys

   user = raw_input("Enter your Telnet Username ")
   password = getpass.getpass()

   f = open('myrouters')
   all_ips = [x.rstrip() for x in f] 
   for line in all_ips:

	print ("Configuring Switch " + (line))
	HOST = line
	tn = telnetlib.Telnet(HOST)
	tn.read_until("Username: ")
	tn.write(user.encode('ascii') + "\n")

	if password:
		tn.read_until("Password: ")
		tn.write(password.encode('ascii') + "\n")

	tn.write("config t\n")

	for n in range (0,2):
		tn.write("interface loopback " + str(n) + "\n")
                tn.write("ip address 1.1." + str(n) + ".2 255.255.255.0\n")

	tn.write("end\n")
	tn.write("wr\n")
	tn.write("exit\n")
	print(tn.read_all().decode('ascii'))

[raajitengg]

I tried everything posted here still same error as martinhoeegh and dazzy099. I tried to manually telnet and it works. Even if I use the same code and with single ip address on the code without using the file open it works fine.
Can someone please help me

[SejoRikel]

try HOST=line.strip() it worked for me

[str8outtajerzy]

Has anyone ever figured this out? I am having the same problem.

[arezazadeh]

i had the same issue,

HOST = line.strip() works

[arezazadeh]

Has anyone ever figured this out? I am having the same problem.

HOST = line.strip() works

[arezazadeh]

does anyone know why we have to use .strip() to get it working?

[sagarCCIE]

To some one who landed to this page like how I did for the code that I was facing the issue.
In short :
HOST = line.strip() works

Here is the right script that works:
#!/usr/bin/env python

import getpass
import sys
import telnetlib

user = raw_input("Enter your username: ")
password = getpass.getpass()

f = open ('myswitches')

for line in f:
print "Configuring Switch " + (line)
HOST = line.strip()
tn = telnetlib.Telnet(HOST)

tn.read_until("Username: ")
tn.write(user + "\n")
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")

tn.write("conf t\n")

for n in range (2,26):
    tn.write("vlan " + str(n) + "\n")
    tn.write("name Python_VLAN_" + str(n) + "\n")

tn.write("end\n")
tn.write("exit\n")

print tn.read_all()

In case of further queries please write to me at networkjourneydotcom@gmail.com
Youtube channel for Network automations - https://www.youtube.com/playlist?list=PLtFe0r3PejgnDmMTbFupLxlXTMkFtZGwh

[xxCRONOxx]

Tried line.strip () and received the same error, copied the exact code from sagar and tested and same error

Traceback (most recent call last):
File "./teststuff", line 15, in
tn = telnetlib.Telnet(HOST)
File "/usr/lib/python2.7/telnetlib.py", line 211, in init
self.open(host, port, timeout)
File "/usr/lib/python2.7/telnetlib.py", line 227, in open
self.sock = socket.create_connection((host, port), timeout)
File "/usr/lib/python2.7/socket.py", line 557, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -3] Temporary failure in name resolution
root@UbuntuDockerGuest-1:~#

[arezazadeh]

Have you tried with a single host first?