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Using Netmiko to work with Interfaces

These example scripts use the Netmiko Python library to interact with a device through CLI

These Python scripts leverages Netmiko to:

  • Create Loopback 103
  • Retrieve details about Loopback 103
  • Delete Loopback 103

This script has been tested with Python 3.6, however may work with other versions.

DevNet Sandbox

This script targets the IOS XE DevNet Always On Sandbox that leverages a CSR1000v as a target.

To execute this script against a different device, create a new device dictionary in device_info.py for your device. Then import this new dictionary instead of ios_xe1 in the scripts.

Requirements

Python

  • netmiko

Getting Started

  • Clone the Python Examples and change into the directory.

    git clone https://github.com/CiscoDevNet/python_code_samples_network.git
cd python_code_samples_network
cd netmiko-interface-example

  • Create and activate a virtualenv

    Windows - recommendation to use git-bash terminal
py -3 -m venv venv
source venv/Scripts/activate

MacOS or Linux
python3.6 -m venv venv
source venv/bin/activate

  • Install the requirements

    pip install -r requirements.txt

  • Run the scripts

    # Run the get script to retrieve interface
$ python netmiko-get-interface.py

# Output - Interface not there yet...                                                ^
% Invalid input detected at '^' marker.

There was an error, Loopback103 might not exist.

# Run the create script to create interface
$ python netmiko-create-interface.py

# Output - what was configured
The following configuration was sent:
config term
Enter configuration commands, one per line.  End with CNTL/Z.
csr1000v(config)#interface Loopback103
csr1000v(config-if)#description Demo interface by CLI and netmiko
csr1000v(config-if)#ip address 192.168.103.1 255.255.255.0
csr1000v(config-if)#no shut
csr1000v(config-if)#end
csr1000v#

# Run the get script again
$ python netmiko-get-interface.py

# Output - there it is!
Building configuration...

Current configuration : 116 bytes
!
interface Loopback103
 description Demo interface by CLI and netmiko
 ip address 192.168.103.1 255.255.255.0
end

The interface Loopback103 has ip address 192.168.103.1/255.255.255.0

# Run the delete script to remove the interface
$ python netmiko-delete-interface.py

# Output - what was sent to remove the interface
The following configuration was sent:
config term
Enter configuration commands, one per line.  End with CNTL/Z.
csr1000v(config)#no interface Loopback103
csr1000v(config)#end
csr1000v#