16471 Grundlæggende programmering
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Primtal opgave svar
Python and networking
Materials
- Python Network Programming for Network Engineers (Python 3) (Oreilly Video based)
- GNS3 see - Chapter 1 - part 2 to 6
- Link to: Cisco 7200 IOS
- Chapter 3 - Telnet
- Chapter 4 - SSH
- Chapter 5 - NAPALM - Mutivendor automation API
- GNS3 see - Chapter 1 - part 2 to 6
Telnet
To use this module, you need to be able to telnet to one or more Cisco devices.
Example of basic setup for Telnet and SSH
hostname R1
!
username cisco password 0 cisco
!
ip domain-name merhot.dk
!
crypto key generate rsa general-keys modulus 1024
!
aaa new-model
aaa authentication login default local
aaa authentication login CONSOLE none
aaa authorization exec default local
aaa session-id common
!
enable secret cisco
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
ip ssh time-out 60
ip ssh authentication-retries 2
ip ssh source-interface Loopback0
ip ssh logging events
!
line vty 0 15
transport input ssh telnet
!
line con 0
login authentication CONSOLEPython 3 telnet example
import getpass
import sys
import telnetlib
host = "192.168.239.129"
user = input("Username: ")
password = input("Password: ")
tn = telnetlib.Telnet(host)
tn.read_until(b"Username: ")
tn.write(user.encode('ascii') + b"\n")
if password:
tn.read_until(b"Password: ")
tn.write(password.encode('ascii') + b"\n")
tn.write(b"enable\n")
tn.write(b"cisco\n")
tn.write(b"conf t\n")
tn.write(b"int loop 0\n")
tn.write(b"ip address 1.1.1.1 255.255.255.255\n")
tn.write(b"int loop 1\n")
tn.write(b"ip address 1.1.1.2 255.255.255.255\n")
tn.write(b"end\n")
tn.write(b"exit\n")
print(tn.read_all())
SSH
To use this module, you need to be able to ssh to one or more Cisco devices.