Python script for Cisco devices

Question

I want to extract running config from Cisco devices, but not getting desiered output from the code

import the neccessary modules

import time, sys, getpass, paramiko

setup the variables used in the script

ip = '10.155.111.5'
username = ""
password = ""

establish an SSH session using local authentication to a cisco switch

remote_conn_pre = paramiko.SSHClient()
remote_conn_pre.set_missing_host_key_policy(paramiko.AutoAddPolicy())
remote_conn_pre.connect(ip, username=username, password=password,         
look_for_keys= False, allow_agent=False)
print "Interactive SSH session established to %s" %ip
remote_conn = remote_conn_pre.invoke_shell()
output = remote_conn.recv(1000)
print output

check current settings on SNMP

remote_conn.send("show run | in snmp")

display the updated port config

output = remote_conn.recv(3000)
print "-------------------AFTER-----------------------"
print '\n'.join(output)

close out ssh session

sys.exit("ALL Done!")

---

Getting following output

====================== RESTART: D:\user\SNMP.py ====================== Interactive SSH session established to 10.155.111.5

switch003# -------------------AFTER----------------------- s

>

Answer 1

I'm using python 3.6 on Windows, the below works for me and should work in 2.6 as well. Your router probably requires a password for enable mode as well, hence the error. Try the below and let me if it works. I also use a sleep timer as sometimes the connection to the remote is a bit slow.

import time, sys, getpass, paramiko

ip = input('Please enter the IpAddress of the host:')
username = input("Please enter username:")
password = getpass.getpass('Please enter a password:')

output = ""
# Create a new instance of an sshclient
client = paramiko.SSHClient()
# Set the missing host key policy to auto add the certificate
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname=ip, username=username, password=password)
remote_conn = client.invoke_shell()
print("Interactive session established with {0}\n".format(ip))
remote_conn.send('\n')
remote_conn.send('enable\n')
time.sleep(1)
en_password = password + '\n'
#Ensure you send the enable password
remote_conn.send(en_password)
time.sleep(1)
print("{0}:Getting to enable mode was a success....".format(ip))
remote_conn.send("term len 0\n")
time.sleep(1)
output = remote_conn.recv(50000)
#Flush the output
output = ""
#Send a command
remote_conn.send("sh run | i snmp\n")
#wait a couple of seconds
time.sleep(5)
output = remote_conn.recv(50000)
print(output)